kvm: mmu: Fix overflow on kvm mmu page limit calculation

[ Upstream commit bc8a3d8925a8fa09fa550e0da115d95851ce33c6 ]

KVM bases its memory usage limits on the total number of guest pages
across all memslots. However, those limits, and the calculations to
produce them, use 32 bit unsigned integers. This can result in overflow
if a VM has more guest pages that can be represented by a u32. As a
result of this overflow, KVM can use a low limit on the number of MMU
pages it will allocate. This makes KVM unable to map all of guest memory
at once, prompting spurious faults.

Tested: Ran all kvm-unit-tests on an Intel Haswell machine. This patch
introduced no new failures.

Signed-off-by: Ben Gardon <bgardon@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

IB/mlx5: Reset access mask when looping inside page fault handler

[ Upstream commit 1abe186ed8a6593069bc122da55fc684383fdc1c ]

If page-fault handler spans multiple MRs then the access mask needs to
be reset before each MR handling or otherwise write access will be
granted to mapped pages instead of read-only.

Cc: <stable@vger.kernel.org> # 3.19
Fixes: 7bdf65d411c1 ("IB/mlx5: Handle page faults")
Reported-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: stratix10: add the sysmgr-syscon property from the gmac's

[ Upstream commit 8efd6365417a044db03009724ecc1a9521524913 ]

The gmac ethernet driver uses the "altr,sysmgr-syscon" property to
configure phy settings for the gmac controller.

Add the "altr,sysmgr-syscon" property to all gmac nodes.

This patch fixes:

[    0.917530] socfpga-dwmac ff800000.ethernet: No sysmgr-syscon node found
[    0.924209] socfpga-dwmac ff800000.ethernet: Unable to parse OF data

Cc: stable@vger.kernel.org
Reported-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

usb: typec: tcpm: Try PD-2.0 if sink does not respond to 3.0 source-caps

[ Upstream commit 976daf9d1199932df80e7b04546d1a1bd4ed5ece ]

PD 2.0 sinks are supposed to accept src-capabilities with a 3.0 header and
simply ignore any src PDOs which the sink does not understand such as PPS
but some 2.0 sinks instead ignore the entire PD_DATA_SOURCE_CAP message,
causing contract negotiation to fail.

This commit fixes such sinks not working by re-trying the contract
negotiation with PD-2.0 source-caps messages if we don't have a contract
after PD_N_HARD_RESET_COUNT hard-reset attempts.

The problem fixed by this commit was noticed with a Type-C to VGA dongle.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Sanity check mmap length against object size

[ Upstream commit 000c4f90e3f0194eef218ff2c6a8fd8ca1de4313 ]

We assumed that vm_mmap() would reject an attempt to mmap past the end of
the filp (our object), but we were wrong.

Applications that tried to use the mmap beyond the end of the object
would be greeted by a SIGBUS. After this patch, those applications will
be told about the error on creating the mmap, rather than at a random
moment on later access.

Reported-by: Antonio Argenziano <antonio.argenziano@intel.com>
Testcase: igt/gem_mmap/bad-size
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Antonio Argenziano <antonio.argenziano@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190314075829.16838-1-chris@chris-wilson.co.uk
(cherry picked from commit 794a11cb67201ad1bb61af510bb8460280feb3f3)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Handle vm_mmap error during I915_GEM_MMAP ioctl with WC set

[ Upstream commit ebfb6977801da521d8d5d752d373a187e2a2b9b3 ]

Add err goto label and use it when VMA can't be established or changes
underneath.

v2:
- Dropping Fixes: as it's indeed impossible to race an object to the
  error address. (Chris)
v3:
- Use IS_ERR_VALUE (Chris)

Reported-by: Adam Zabrocki <adamza@microsoft.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Adam Zabrocki <adamza@microsoft.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> #v2
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190207085454.10598-2-joonas.lahtinen@linux.intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

CIFS: Fix leaking locked VFS cache pages in writeback retry

[ Upstream commit 165df9a080b6863ae286fa01780c13d87cd81076 ]

If we don't find a writable file handle when retrying writepages
we break of the loop and do not unlock and put pages neither from
wdata2 nor from the original wdata. Fix this by walking through
all the remaining pages and cleanup them properly.

Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

CIFS: Fix error paths in writeback code

[ Upstream commit 9a66396f1857cc1de06f4f4771797315e1a4ea56 ]

This patch aims to address writeback code problems related to error
paths. In particular it respects EINTR and related error codes and
stores and returns the first error occurred during writeback.

Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm: add __user attribute to ptr_to_compat()

[ Upstream commit e552f0851070fe4975d610a99910be4e9bf5d7bd ]

The ptr_to_compat() call takes a "void __user *", so cast
the compat drm calls that use it to avoid the following
warnings from sparse:

drivers/gpu/drm/drm_ioc32.c:188:39: warning: incorrect type in argument 1 (different address spaces)
drivers/gpu/drm/drm_ioc32.c:188:39:    expected void [noderef] <asn:1>*uptr
drivers/gpu/drm/drm_ioc32.c:188:39:    got void *[addressable] [assigned] handle
drivers/gpu/drm/drm_ioc32.c:529:41: warning: incorrect type in argument 1 (different address spaces)
drivers/gpu/drm/drm_ioc32.c:529:41:    expected void [noderef] <asn:1>*uptr
drivers/gpu/drm/drm_ioc32.c:529:41:    got void *[addressable] [assigned] handle

Cc: stable@vger.kernel.org
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190301120046.26961-1-ben.dooks@codethink.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>

PCI: qcom: Don't deassert reset GPIO during probe

[ Upstream commit 02b485e31d98265189b91f3e69c43df2ed50610c ]

Acquiring the reset GPIO low means that reset is being deasserted, this
is followed almost immediately with qcom_pcie_host_init() asserting it,
initializing it and then finally deasserting it again, for the link to
come up.

Some PCIe devices requires a minimum time between the initial deassert
and subsequent reset cycles. In a platform that boots with the reset
GPIO asserted this requirement is being violated by this deassert/assert
pulse.

Acquire the reset GPIO high to prevent this situation by matching the
state to the subsequent asserted state.

Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

PCI: qcom: Fix error handling in runtime PM support

[ Upstream commit 6e5da6f7d82474e94c2d4a38cf9ca4edbb3e03a0 ]

The driver does not cope with the fact that probe can fail in a number
of cases after enabling runtime PM on the device; this results in
warnings about "Unbalanced pm_runtime_enable". Furthermore if probe
fails after invoking qcom_pcie_host_init() the power-domain will be left
referenced.

As it is not possible for the error handling in qcom_pcie_host_init() to
handle errors happening after returning from that function the
pm_runtime_get_sync() is moved to qcom_pcie_probe() as well.

Fixes: 854b69efbdd2 ("PCI: qcom: add runtime pm support to pcie_port")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: init csum_list before possible free

[ Upstream commit e49be14b8d80e23bb7c53d78c21717a474ade76b ]

The scrub_ctx csum_list member must be initialized before scrub_free_ctx
is called. If the csum_list is not initialized beforehand, the
list_empty call in scrub_free_csums will result in a null deref if the
allocation fails in the for loop.

Fixes: a2de733c78fa ("btrfs: scrub")
CC: stable@vger.kernel.org # 3.0+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: scrub: fix circular locking dependency warning

[ Upstream commit 1cec3f27168d7835ff3d23ab371cd548440131bb ]

This fixes a longstanding lockdep warning triggered by
fstests/btrfs/011.

Circular locking dependency check reports warning[1], that's because the
btrfs_scrub_dev() calls the stack #0 below with, the fs_info::scrub_lock
held. The test case leading to this warning:

  $ mkfs.btrfs -f /dev/sdb
  $ mount /dev/sdb /btrfs
  $ btrfs scrub start -B /btrfs

In fact we have fs_info::scrub_workers_refcnt to track if the init and destroy
of the scrub workers are needed. So once we have incremented and decremented
the fs_info::scrub_workers_refcnt value in the thread, its ok to drop the
scrub_lock, and then actually do the btrfs_destroy_workqueue() part. So this
patch drops the scrub_lock before calling btrfs_destroy_workqueue().

  [359.258534] ======================================================
  [359.260305] WARNING: possible circular locking dependency detected
  [359.261938] 5.0.0-rc6-default #461 Not tainted
  [359.263135] ------------------------------------------------------
  [359.264672] btrfs/20975 is trying to acquire lock:
  [359.265927] 00000000d4d32bea ((wq_completion)"%s-%s""btrfs", name){+.+.}, at: flush_workqueue+0x87/0x540
  [359.268416]
  [359.268416] but task is already holding lock:
  [359.270061] 0000000053ea26a6 (&fs_info->scrub_lock){+.+.}, at: btrfs_scrub_dev+0x322/0x590 [btrfs]
  [359.272418]
  [359.272418] which lock already depends on the new lock.
  [359.272418]
  [359.274692]
  [359.274692] the existing dependency chain (in reverse order) is:
  [359.276671]
  [359.276671] -> #3 (&fs_info->scrub_lock){+.+.}:
  [359.278187]        __mutex_lock+0x86/0x9c0
  [359.279086]        btrfs_scrub_pause+0x31/0x100 [btrfs]
  [359.280421]        btrfs_commit_transaction+0x1e4/0x9e0 [btrfs]
  [359.281931]        close_ctree+0x30b/0x350 [btrfs]
  [359.283208]        generic_shutdown_super+0x64/0x100
  [359.284516]        kill_anon_super+0x14/0x30
  [359.285658]        btrfs_kill_super+0x12/0xa0 [btrfs]
  [359.286964]        deactivate_locked_super+0x29/0x60
  [359.288242]        cleanup_mnt+0x3b/0x70
  [359.289310]        task_work_run+0x98/0xc0
  [359.290428]        exit_to_usermode_loop+0x83/0x90
  [359.291445]        do_syscall_64+0x15b/0x180
  [359.292598]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
  [359.294011]
  [359.294011] -> #2 (sb_internal#2){.+.+}:
  [359.295432]        __sb_start_write+0x113/0x1d0
  [359.296394]        start_transaction+0x369/0x500 [btrfs]
  [359.297471]        btrfs_finish_ordered_io+0x2aa/0x7c0 [btrfs]
  [359.298629]        normal_work_helper+0xcd/0x530 [btrfs]
  [359.299698]        process_one_work+0x246/0x610
  [359.300898]        worker_thread+0x3c/0x390
  [359.302020]        kthread+0x116/0x130
  [359.303053]        ret_from_fork+0x24/0x30
  [359.304152]
  [359.304152] -> #1 ((work_completion)(&work->normal_work)){+.+.}:
  [359.306100]        process_one_work+0x21f/0x610
  [359.307302]        worker_thread+0x3c/0x390
  [359.308465]        kthread+0x116/0x130
  [359.309357]        ret_from_fork+0x24/0x30
  [359.310229]
  [359.310229] -> #0 ((wq_completion)"%s-%s""btrfs", name){+.+.}:
  [359.311812]        lock_acquire+0x90/0x180
  [359.312929]        flush_workqueue+0xaa/0x540
  [359.313845]        drain_workqueue+0xa1/0x180
  [359.314761]        destroy_workqueue+0x17/0x240
  [359.315754]        btrfs_destroy_workqueue+0x57/0x200 [btrfs]
  [359.317245]        scrub_workers_put+0x2c/0x60 [btrfs]
  [359.318585]        btrfs_scrub_dev+0x336/0x590 [btrfs]
  [359.319944]        btrfs_dev_replace_by_ioctl.cold.19+0x179/0x1bb [btrfs]
  [359.321622]        btrfs_ioctl+0x28a4/0x2e40 [btrfs]
  [359.322908]        do_vfs_ioctl+0xa2/0x6d0
  [359.324021]        ksys_ioctl+0x3a/0x70
  [359.325066]        __x64_sys_ioctl+0x16/0x20
  [359.326236]        do_syscall_64+0x54/0x180
  [359.327379]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
  [359.328772]
  [359.328772] other info that might help us debug this:
  [359.328772]
  [359.330990] Chain exists of:
  [359.330990]   (wq_completion)"%s-%s""btrfs", name --> sb_internal#2 --> &fs_info->scrub_lock
  [359.330990]
  [359.334376]  Possible unsafe locking scenario:
  [359.334376]
  [359.336020]        CPU0                    CPU1
  [359.337070]        ----                    ----
  [359.337821]   lock(&fs_info->scrub_lock);
  [359.338506]                                lock(sb_internal#2);
  [359.339506]                                lock(&fs_info->scrub_lock);
  [359.341461]   lock((wq_completion)"%s-%s""btrfs", name);
  [359.342437]
  [359.342437]  *** DEADLOCK ***
  [359.342437]
  [359.343745] 1 lock held by btrfs/20975:
  [359.344788]  #0: 0000000053ea26a6 (&fs_info->scrub_lock){+.+.}, at: btrfs_scrub_dev+0x322/0x590 [btrfs]
  [359.346778]
  [359.346778] stack backtrace:
  [359.347897] CPU: 0 PID: 20975 Comm: btrfs Not tainted 5.0.0-rc6-default #461
  [359.348983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.2-0-gf9626cc-prebuilt.qemu-project.org 04/01/2014
  [359.350501] Call Trace:
  [359.350931]  dump_stack+0x67/0x90
  [359.351676]  print_circular_bug.isra.37.cold.56+0x15c/0x195
  [359.353569]  check_prev_add.constprop.44+0x4f9/0x750
  [359.354849]  ? check_prev_add.constprop.44+0x286/0x750
  [359.356505]  __lock_acquire+0xb84/0xf10
  [359.357505]  lock_acquire+0x90/0x180
  [359.358271]  ? flush_workqueue+0x87/0x540
  [359.359098]  flush_workqueue+0xaa/0x540
  [359.359912]  ? flush_workqueue+0x87/0x540
  [359.360740]  ? drain_workqueue+0x1e/0x180
  [359.361565]  ? drain_workqueue+0xa1/0x180
  [359.362391]  drain_workqueue+0xa1/0x180
  [359.363193]  destroy_workqueue+0x17/0x240
  [359.364539]  btrfs_destroy_workqueue+0x57/0x200 [btrfs]
  [359.365673]  scrub_workers_put+0x2c/0x60 [btrfs]
  [359.366618]  btrfs_scrub_dev+0x336/0x590 [btrfs]
  [359.367594]  ? start_transaction+0xa1/0x500 [btrfs]
  [359.368679]  btrfs_dev_replace_by_ioctl.cold.19+0x179/0x1bb [btrfs]
  [359.369545]  btrfs_ioctl+0x28a4/0x2e40 [btrfs]
  [359.370186]  ? __lock_acquire+0x263/0xf10
  [359.370777]  ? kvm_clock_read+0x14/0x30
  [359.371392]  ? kvm_sched_clock_read+0x5/0x10
  [359.372248]  ? sched_clock+0x5/0x10
  [359.372786]  ? sched_clock_cpu+0xc/0xc0
  [359.373662]  ? do_vfs_ioctl+0xa2/0x6d0
  [359.374552]  do_vfs_ioctl+0xa2/0x6d0
  [359.375378]  ? do_sigaction+0xff/0x250
  [359.376233]  ksys_ioctl+0x3a/0x70
  [359.376954]  __x64_sys_ioctl+0x16/0x20
  [359.377772]  do_syscall_64+0x54/0x180
  [359.378841]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
  [359.380422] RIP: 0033:0x7f5429296a97

Backporting to older kernels: scrub_nocow_workers must be freed the same
way as the others.

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ update changelog ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: scrub: move scrub_setup_ctx allocation out of device_list_mutex

[ Upstream commit 0e94c4f45d14cf89d1f40c91b0a8517e791672a7 ]

The scrub context is allocated with GFP_KERNEL and called from
btrfs_scrub_dev under the fs_info::device_list_mutex. This is not safe
regarding reclaim that could try to flush filesystem data in order to
get the memory. And the device_list_mutex is held during superblock
commit, so this would cause a lockup.

Move the alocation and initialization before any changes that require
the mutex.

Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: scrub: pass fs_info to scrub_setup_ctx

[ Upstream commit 92f7ba434f51e8e9317f1d166105889aa230abd2 ]

We can pass fs_info directly as this is the only member of btrfs_device
that's bing used inside scrub_setup_ctx.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

mmc: renesas_sdhi: Fix card initialization failure in high speed mode

[ Upstream commit d30ae056adb81e1d2b8b953efa74735a020b8e3b ]

This fixes card initialization failure in high speed mode.

If U-Boot uses SDR or HS200/400 mode before starting Linux and Linux
DT does not enable SDR/HS200/HS400 mode, card initialization fails in
high speed mode.

It is necessary to initialize SCC registers during card initialization
phase. HW reset function is registered only for a port with either of
SDR/HS200/HS400 properties in device tree. If SDR/HS200/HS400 properties
are not present in device tree, SCC registers will not be reset. In SoC
that support SCC registers, HW reset function should be registered
regardless of the configuration of device tree.

Reproduction procedure:
- Use U-Boot that support MMC HS200/400 mode.
- Delete HS200/HS400 properties in device tree.
  (Delete mmc-hs200-1_8v and mmc-hs400-1_8v)
- MMC port works high speed mode and all commands fail.

Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Cc: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

powerpc/kvm: Save and restore host AMR/IAMR/UAMOR

[ Upstream commit c3c7470c75566a077c8dc71dcf8f1948b8ddfab4 ]

When the hash MMU is active the AMR, IAMR and UAMOR are used for
pkeys. The AMR is directly writable by user space, and the UAMOR masks
those writes, meaning both registers are effectively user register
state. The IAMR is used to create an execute only key.

Also we must maintain the value of at least the AMR when running in
process context, so that any memory accesses done by the kernel on
behalf of the process are correctly controlled by the AMR.

Although we are correctly switching all registers when going into a
guest, on returning to the host we just write 0 into all regs, except
on Power9 where we restore the IAMR correctly.

This could be observed by a user process if it writes the AMR, then
runs a guest and we then return immediately to it without
rescheduling. Because we have written 0 to the AMR that would have the
effect of granting read/write permission to pages that the process was
trying to protect.

In addition, when using the Radix MMU, the AMR can prevent inadvertent
kernel access to userspace data, writing 0 to the AMR disables that
protection.

So save and restore AMR, IAMR and UAMOR.

Fixes: cf43d3b26452 ("powerpc: Enable pkey subsystem")
Cc: stable@vger.kernel.org # v4.16+
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

spi: spi-gpio: fix SPI_CS_HIGH capability

[ Upstream commit b89fefda7d4e3a649129584d855be233c7465264 ]

spi-gpio is capable of dealing with active-high chip-selects.
Unfortunately, commit 4b859db2c606 ("spi: spi-gpio: add SPI_3WIRE
support") broke this by setting master->mode_bits, which overrides
the setting in the spi-bitbang code.  Fix this.

[Fixed a trivial conflict with SPI_3WIRE_HIZ support -- broonie]

Fixes: 4b859db2c606 ("spi: spi-gpio: add SPI_3WIRE support")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

x86/kvmclock: set offset for kvm unstable clock

[ Upstream commit b5179ec4187251a751832193693d6e474d3445ac ]

VMs may show incorrect uptime and dmesg printk offsets on hypervisors with
unstable clock. The problem is produced when VM is rebooted without exiting
from qemu.

The fix is to calculate clock offset not only for stable clock but for
unstable clock as well, and use kvm_sched_clock_read() which substracts
the offset for both clocks.

This is safe, because pvclock_clocksource_read() does the right thing and
makes sure that clock always goes forward, so once offset is calculated
with unstable clock, we won't get new reads that are smaller than offset,
and thus won't get negative results.

Thank you Jon DeVree for helping to reproduce this issue.

Fixes: 857baa87b642 ("sched/clock: Enable sched clock early")
Cc: stable@vger.kernel.org
Reported-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

iwlwifi: add new card for 9260 series

[ Upstream commit 3941310cf665b8a7965424d2a185c80782faa030 ]

Add one PCI ID for 9260 series.

CC: <stable@vger.kernel.org> # 4.14+
Signed-off-by: Ihab Zhaika <ihab.zhaika@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

iwlwifi: fix devices with PCI Device ID 0x34F0 and 11ac RF modules

[ Upstream commit ab27926d9e4ae23df4f4d98e31f067c8b486bb4f ]

The devices with PCI device ID 0x34F0 are part of the SoC and can be
combined with some different external RF modules.  The configuration
for these devices should reflect that, but are currently mixed up.  To
avoid confusion with discrete devices, add part of the firmware to be
used and the official name of the device to the cfg structs.

This is least reorganization possible (without messing things even
more) that could be done as a bugfix for this SoC.  Further
reorganization of this code will be done separately.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/nouveau: Don't WARN_ON VCPI allocation failures

[ Upstream commit b513a18cf1d705bd04efd91c417e79e4938be093 ]

This is much louder then we want. VCPI allocation failures are quite
normal, since they will happen if any part of the modesetting process is
interrupted by removing the DP MST topology in question. So just print a
debugging message on VCPI failures instead.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: f479c0ba4a17 ("drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream")
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

mt76: fix corrupted software generated tx CCMP PN

[ Upstream commit 906d2d3f874a54183df5a609fda180adf0462428 ]

Since ccmp_pn is u8 *, the second half needs to start at array index 4
instead of 0. Fixes a connection stall after a certain amount of traffic

Fixes: 23405236460b9 ("mt76: fix transmission of encrypted management frames")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>

iio: adc: exynos-adc: Use proper number of channels for Exynos4x12

[ Upstream commit 103cda6a3b8d2c10d5f8cd7abad118e9db8f4776 ]

Exynos4212 and Exynos4412 have only four ADC channels so using
"samsung,exynos-adc-v1" compatible (for eight channels ADCv1) on them is
wrong.  Add a new compatible for Exynos4x12.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

dt-bindings: iio: adc: exynos-adc: Add S5PV210 variant

[ Upstream commit a9b0a2a7c19316588421b94946c8e2e5a84ac14e ]

Add information about new compatible for S5PV210

Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

iio: adc: exynos-adc: Add S5PV210 variant

[ Upstream commit 882bf52fdeab47dbe991cc0e564b0b51c571d0a3 ]

S5PV210's ADC variant is almost the same as v1 except that it has 10
channels and doesn't require the pmu register

Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: VMX: Compare only a single byte for VMCS' "launched" in vCPU-run

[ Upstream commit 61c08aa9606d4e48a8a50639c956448a720174c3 ]

The vCPU-run asm blob does a manual comparison of a VMCS' launched
status to execute the correct VM-Enter instruction, i.e. VMLAUNCH vs.
VMRESUME.  The launched flag is a bool, which is a typedef of _Bool.
C99 does not define an exact size for _Bool, stating only that is must
be large enough to hold '0' and '1'.  Most, if not all, compilers use
a single byte for _Bool, including gcc[1].

Originally, 'launched' was of type 'int' and so the asm blob used 'cmpl'
to check the launch status.  When 'launched' was moved to be stored on a
per-VMCS basis, struct vcpu_vmx's "temporary" __launched flag was added
in order to avoid having to pass the current VMCS into the asm blob.
The new  '__launched' was defined as a 'bool' and not an 'int', but the
'cmp' instruction was not updated.

This has not caused any known problems, likely due to compilers aligning
variables to 4-byte or 8-byte boundaries and KVM zeroing out struct
vcpu_vmx during allocation.  I.e. vCPU-run accesses "junk" data, it just
happens to always be zero and so doesn't affect the result.

[1] https://gcc.gnu.org/ml/gcc-patches/2000-10/msg01127.html

Fixes: d462b8192368 ("KVM: VMX: Keep list of loaded VMCSs, instead of vcpus")
Cc: <stable@vger.kernel.org>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

bcache: treat stale && dirty keys as bad keys

[ Upstream commit 58ac323084ebf44f8470eeb8b82660f9d0ee3689 ]

Stale && dirty keys can be produced in the follow way:
After writeback in write_dirty_finish(), dirty keys k1 will
replace by clean keys k2
==>ret = bch_btree_insert(dc->disk.c, &keys, NULL, &w->key);
==>btree_insert_fn(struct btree_op *b_op, struct btree *b)
==>static int bch_btree_insert_node(struct btree *b,
       struct btree_op *op,
       struct keylist *insert_keys,
       atomic_t *journal_ref,
Then two steps:
A) update k1 to k2 in btree node memory;
   bch_btree_insert_keys(b, op, insert_keys, replace_key)
B) Write the bset(contains k2) to cache disk by a 30s delay work
   bch_btree_leaf_dirty(b, journal_ref).
But before the 30s delay work write the bset to cache device,
these things happened:
A) GC works, and reclaim the bucket k2 point to;
B) Allocator works, and invalidate the bucket k2 point to,
   and increase the gen of the bucket, and place it into free_inc
   fifo;
C) Until now, the 30s delay work still does not finish work,
   so in the disk, the key still is k1, it is dirty and stale
   (its gen is smaller than the gen of the bucket). and then the
   machine power off suddenly happens;
D) When the machine power on again, after the btree reconstruction,
   the stale dirty key appear.

In bch_extent_bad(), when expensive_debug_checks is off, it would
treat the dirty key as good even it is stale keys, and it would
cause bellow probelms:
A) In read_dirty() it would cause machine crash:
   BUG_ON(ptr_stale(dc->disk.c, &w->key, 0));
B) It could be worse when reads hits stale dirty keys, it would
   read old incorrect data.

This patch tolerate the existence of these stale && dirty keys,
and treat them as bad key in bch_extent_bad().

(Coly Li: fix indent which was modified by sender's email client)

Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

bcache: replace hard coded number with BUCKET_GC_GEN_MAX

[ Upstream commit 149d0efada7777ad5a5242b095692af142f533d8 ]

In extents.c:bch_extent_bad(), number 96 is used as parameter to call
btree_bug_on(). The purpose is to check whether stale gen value exceeds
BUCKET_GC_GEN_MAX, so it is better to use macro BUCKET_GC_GEN_MAX to
make the code more understandable.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

tpm: Fix some name collisions with drivers/char/tpm.h

[ Upstream commit 8ab547a2dcfac6ec184a5e036e1093eb3f7a215c ]

* Rename TPM_BUFSIZE defined in drivers/char/tpm/st33zp24/st33zp24.h to
  ST33ZP24_BUFSIZE.
* Rename TPM_BUFSIZE defined in drivers/char/tpm/tpm_i2c_infineon.c to
  TPM_I2C_INFINEON_BUFSIZE.
* Rename TPM_RETRY in tpm_i2c_nuvoton to TPM_I2C_RETRIES.
* Remove TPM_HEADER_SIZE from tpm_i2c_nuvoton.

Cc: stable@vger.kernel.org
Fixes: bf38b8710892 ("tpm/tpm_i2c_stm_st33: Split tpm_i2c_tpm_st33 in 2 layers (core + phy)")
Fixes: aad628c1d91a ("char/tpm: Add new driver for Infineon I2C TIS TPM")
Fixes: 32d33b29ba07 ("TPM: Retry SaveState command in suspend path")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

mfd: Kconfig: Fix I2C_DESIGNWARE_PLATFORM dependencies

[ Upstream commit 09fdc98577120d4f47601c3127efde726a2300c6 ]

INTEL_SOC_PMIC, INTEL_SOC_PMIC_CHTWC and MFD_TPS68470 select the
I2C_DESIGNWARE_PLATFORM without its dependencies making it possible to see
warning and build error like below:

WARNING: unmet direct dependencies detected for I2C_DESIGNWARE_PLATFORM
  Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ACPI [=y] && COMMON_CLK [=n] || !ACPI [=y])
  Selected by [y]:
  - MFD_TPS68470 [=y] && HAS_IOMEM [=y] && ACPI [=y] && I2C [=y]=y

/usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_resume':
i2c-designware-platdrv.c:(.text+0x62): undefined reference to `i2c_dw_prepare_clk'
/usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_suspend':
i2c-designware-platdrv.c:(.text+0x9a): undefined reference to `i2c_dw_prepare_clk'
/usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_probe':
i2c-designware-platdrv.c:(.text+0x41c): undefined reference to `i2c_dw_prepare_clk'
/usr/bin/ld: i2c-designware-platdrv.c:(.text+0x438): undefined reference to `i2c_dw_read_comp_param'
/usr/bin/ld: i2c-designware-platdrv.c:(.text+0x545): undefined reference to `i2c_dw_probe'
/usr/bin/ld: i2c-designware-platdrv.c:(.text+0x727): undefined reference to `i2c_dw_probe_slave'

Fix this by making above options to depend on I2C_DESIGNWARE_PLATFORM
being built-in. I2C_DESIGNWARE_PLATFORM is a visible symbol with
dependencies so in general the select should be avoided.

Fixes: acebcff9eda8 ("mfd: intel_soc_pmic: Select designware i2c-bus driver")
Fixes: de85d79f4aab ("mfd: Add Cherry Trail Whiskey Cove PMIC driver")
Fixes: 9bbf6a15ce19 ("mfd: Add support for TPS68470 device")
Cc: Stable <stable@vger.kernel.org> # v4.14+
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915/ilk: Fix warning when reading emon_status with no output

[ Upstream commit cab870b7fdf3c4be747d88de5248b28db7d4055e ]

When there is no output no one will hold a runtime_pm reference
causing a warning when trying to read emom_status in debugfs.

[22.756480] ------------[ cut here ]------------
[22.756489] RPM wakelock ref not held during HW access
[22.756578] WARNING: CPU: 0 PID: 1058 at drivers/gpu/drm/i915/intel_drv.h:2104 gen5_read32+0x16b/0x1a0 [i915]
[22.756580] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core e1000e snd_pcm mei_me prime_numbers mei lpc_ich
[22.756595] CPU: 0 PID: 1058 Comm: debugfs_test Not tainted 4.20.0-rc1-CI-Trybot_3219+ #1
[22.756597] Hardware name: Hewlett-Packard HP Compaq 8100 Elite SFF PC/304Ah, BIOS 786H1 v01.13 07/14/2011
[22.756634] RIP: 0010:gen5_read32+0x16b/0x1a0 [i915]
[22.756637] Code: a4 ea e0 0f 0b e9 d2 fe ff ff 80 3d a5 71 19 00 00 0f 85 d3 fe ff ff 48 c7 c7 48 d0 2d a0 c6 05 91 71 19 00 01 e8 35 a4 ea e0 <0f> 0b e9 b9 fe ff ff e8 69 c6 f2 e0 85 c0 75 92 48 c7 c2 78 d0 2d
[22.756639] RSP: 0018:ffffc90000f1fd38 EFLAGS: 00010282
[22.756642] RAX: 0000000000000000 RBX: ffff8801f7ab0000 RCX: 0000000000000006
[22.756643] RDX: 0000000000000006 RSI: ffffffff8212886a RDI: ffffffff820d6d57
[22.756645] RBP: 0000000000011020 R08: 0000000043e3d1a8 R09: 0000000000000000
[22.756647] R10: ffffc90000f1fd80 R11: 0000000000000000 R12: 0000000000000001
[22.756649] R13: ffff8801f7ab0068 R14: 0000000000000001 R15: ffff88020d53d188
[22.756651] FS:  00007f2878849980(0000) GS:ffff880213a00000(0000) knlGS:0000000000000000
[22.756653] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[22.756655] CR2: 00005638deedf028 CR3: 0000000203292001 CR4: 00000000000206f0
[22.756657] Call Trace:
[22.756689]  i915_mch_val+0x1b/0x60 [i915]
[22.756721]  i915_emon_status+0x45/0xd0 [i915]
[22.756730]  seq_read+0xdb/0x3c0
[22.756736]  ? lockdep_hardirqs_off+0x94/0xd0
[22.756740]  ? __slab_free+0x24e/0x510
[22.756746]  full_proxy_read+0x52/0x90
[22.756752]  __vfs_read+0x31/0x170
[22.756759]  ? do_sys_open+0x13b/0x240
[22.756763]  ? rcu_read_lock_sched_held+0x6f/0x80
[22.756766]  vfs_read+0x9e/0x140
[22.756770]  ksys_read+0x50/0xc0
[22.756775]  do_syscall_64+0x55/0x190
[22.756781]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[22.756783] RIP: 0033:0x7f28781dc34e
[22.756786] Code: 00 00 00 00 48 8b 15 71 8c 20 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 0f 1f 40 00 8b 05 ba d0 20 00 85 c0 75 16 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5a f3 c3 0f 1f 84 00 00 00 00 00 41 54 55 49
[22.756787] RSP: 002b:00007ffd33fa0d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[22.756790] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f28781dc34e
[22.756792] RDX: 0000000000000200 RSI: 00007ffd33fa0d50 RDI: 0000000000000008
[22.756794] RBP: 00007ffd33fa0f60 R08: 0000000000000000 R09: 0000000000000020
[22.756796] R10: 0000000000000000 R11: 0000000000000246 R12: 00005638de45c2c0
[22.756797] R13: 00007ffd33fa14b0 R14: 0000000000000000 R15: 0000000000000000
[22.756806] irq event stamp: 47950
[22.756811] hardirqs last  enabled at (47949): [<ffffffff810fba74>] vprintk_emit+0x124/0x320
[22.756813] hardirqs last disabled at (47950): [<ffffffff810019b0>] trace_hardirqs_off_thunk+0x1a/0x1c
[22.756816] softirqs last  enabled at (47518): [<ffffffff81c0033a>] __do_softirq+0x33a/0x4b9
[22.756820] softirqs last disabled at (47479): [<ffffffff8108df29>] irq_exit+0xa9/0xc0
[22.756858] WARNING: CPU: 0 PID: 1058 at drivers/gpu/drm/i915/intel_drv.h:2104 gen5_read32+0x16b/0x1a0 [i915]
[22.756860] ---[ end trace bf56fa7d6a3cbf7a ]

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181119230101.32460-1-jose.souza@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/vblank: Allow dynamic per-crtc max_vblank_count

[ Upstream commit ed20151a7699bb2c77eba3610199789a126940c4 ]

On i965gm we need to adjust max_vblank_count dynamically
depending on whether the TV encoder is used or not. To
that end add a per-crtc max_vblank_count that takes
precedence over its device wide counterpart. The driver
can now call drm_crtc_set_max_vblank_count() to configure
the per-crtc value before calling drm_vblank_on().

Also looks like there was some discussion about exynos needing
similar treatment.

v2: Drop the extra max_vblank_count!=0 check for the
    WARN(last!=current), will take care of it in i915 code (Daniel)
    WARN_ON(!inmodeset) (Daniel)
    WARN_ON(dev->max_vblank_count)
    Pimp up the docs (Daniel)

Cc: stable@vger.kernel.org
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181127182004.28885-1-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sasha Levin <sashal@kernel.org>

crypto: ccree - add missing inline qualifier

[ Upstream commit f1071c3e2473ae19a7f5d892a187c4cab1a61f2e ]

Commit 1358c13a48c4 ("crypto: ccree - fix resume race condition on init")
was missing a "inline" qualifier for stub function used when CONFIG_PM
is not set causing a build warning.

Fixes: 1358c13a48c4 ("crypto: ccree - fix resume race condition on init")
Cc: stable@kernel.org # v4.20
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

crypto: ccree - fix resume race condition on init

[ Upstream commit 1358c13a48c43f5e4de0c1835291837a27b9720c ]

We were enabling autosuspend, which is using data set by the
hash module, prior to the hash module being inited, casuing
a crash on resume as part of the startup sequence if the race
was lost.

This was never a real problem because the PM infra was using low
res timers so we were always winning the race, until commit 8234f6734c5d
("PM-runtime: Switch autosuspend over to using hrtimers") changed that :-)

Fix this by seperating the PM setup and enablement and doing the
latter only at the end of the init sequence.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: stable@kernel.org # v4.20
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

IB/uverbs: Fix OOPs upon device disassociation

[ Upstream commit 425784aa5b029eeb80498c73a68f62c3ad1d3b3f ]

The async_file might be freed before the disassociation has been ended,
causing qp shutdown to use after free on it.

Since uverbs_destroy_ufile_hw is not a fence, it returns if a
disassociation is ongoing in another thread. It has to be written this way
to avoid deadlock. However this means that the ufile FD close cannot
destroy anything that may still be used by an active kref, such as the the
async_file.

To fix that move the kref_put() to be in ib_uverbs_release_file().

 BUG: unable to handle kernel paging request at ffffffffba682787
 PGD bc80e067 P4D bc80e067 PUD bc80f063 PMD 1313df163 PTE 80000000bc682061
 Oops: 0003 [#1] SMP PTI
 CPU: 1 PID: 32410 Comm: bash Tainted: G           OE 4.20.0-rc6+ #3
 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
 RIP: 0010:__pv_queued_spin_lock_slowpath+0x1b3/0x2a0
 Code: 98 83 e2 60 49 89 df 48 8b 04 c5 80 18 72 ba 48 8d
ba 80 32 02 00 ba 00 80 00 00 4c 8d 65 14 41 bd 01 00 00 00 48 01 c7 85
d2 <48> 89 2f 48 89 fb 74 14 8b 45 08 85 c0 75 42 84 d2 74 6b f3 90 83
 RSP: 0018:ffffc1bbc064fb58 EFLAGS: 00010006
 RAX: ffffffffba65f4e7 RBX: ffff9f209c656c00 RCX: 0000000000000001
 RDX: 0000000000008000 RSI: 0000000000000000 RDI: ffffffffba682787
 RBP: ffff9f217bb23280 R08: 0000000000000001 R09: 0000000000000000
 R10: ffff9f209d2c7800 R11: ffffffffffffffe8 R12: ffff9f217bb23294
 R13: 0000000000000001 R14: 0000000000000000 R15: ffff9f209c656c00
 FS:  00007fac55aad740(0000) GS:ffff9f217bb00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: ffffffffba682787 CR3: 000000012f8e0000 CR4: 00000000000006e0
 Call Trace:
  _raw_spin_lock_irq+0x27/0x30
  ib_uverbs_release_uevent+0x1e/0xa0 [ib_uverbs]
  uverbs_free_qp+0x7e/0x90 [ib_uverbs]
  destroy_hw_idr_uobject+0x1c/0x50 [ib_uverbs]
  uverbs_destroy_uobject+0x2e/0x180 [ib_uverbs]
  __uverbs_cleanup_ufile+0x73/0x90 [ib_uverbs]
  uverbs_destroy_ufile_hw+0x5d/0x120 [ib_uverbs]
  ib_uverbs_remove_one+0xea/0x240 [ib_uverbs]
  ib_unregister_device+0xfb/0x200 [ib_core]
  mlx5_ib_remove+0x51/0xe0 [mlx5_ib]
  mlx5_remove_device+0xc1/0xd0 [mlx5_core]
  mlx5_unregister_device+0x3d/0xb0 [mlx5_core]
  remove_one+0x2a/0x90 [mlx5_core]
  pci_device_remove+0x3b/0xc0
  device_release_driver_internal+0x16d/0x240
  unbind_store+0xb2/0x100
  kernfs_fop_write+0x102/0x180
  __vfs_write+0x36/0x1a0
  ? __alloc_fd+0xa9/0x170
  ? set_close_on_exec+0x49/0x70
  vfs_write+0xad/0x1a0
  ksys_write+0x52/0xc0
  do_syscall_64+0x5b/0x180
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7fac551aac60

Cc: <stable@vger.kernel.org> # 4.2
Fixes: 036b10635739 ("IB/uverbs: Enable device removal when there are active user space applications")
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARC: mm: do_page_fault fixes #1: relinquish mmap_sem if signal arrives while handle_mm_fault

[ Upstream commit 4d447455e73b47c43dd35fcc38ed823d3182a474 ]

do_page_fault() forgot to relinquish mmap_sem if a signal came while
handling handle_mm_fault() - due to say a ctl+c or oom etc.
This would later cause a deadlock by acquiring it twice.

This came to light when running libc testsuite tst-tls3-malloc test but
is likely also the cause for prior seen LTP failures. Using lockdep
clearly showed what the issue was.

| # while true; do ./tst-tls3-malloc ; done
| Didn't expect signal from child: got `Segmentation fault'
| ^C
| ============================================
| WARNING: possible recursive locking detected
| 4.17.0+ #25 Not tainted
| --------------------------------------------
| tst-tls3-malloc/510 is trying to acquire lock:
| 606c7728 (&mm->mmap_sem){++++}, at: __might_fault+0x28/0x5c
|
|but task is already holding lock:
|606c7728 (&mm->mmap_sem){++++}, at: do_page_fault+0x9c/0x2a0
|
| other info that might help us debug this:
|  Possible unsafe locking scenario:
|
|       CPU0
|       ----
|  lock(&mm->mmap_sem);
|  lock(&mm->mmap_sem);
|
| *** DEADLOCK ***
|

------------------------------------------------------------
What the change does is not obvious (note to myself)

prior code was

| do_page_fault
|
|   down_read() <-- lock taken
|   handle_mm_fault <-- signal pending as this runs
|   if fatal_signal_pending
|       if VM_FAULT_ERROR
|           up_read
|       if user_mode
|          return <-- lock still held, this was the BUG

New code

| do_page_fault
|
|   down_read() <-- lock taken
|   handle_mm_fault <-- signal pending as this runs
|   if fatal_signal_pending
|       if VM_FAULT_RETRY
|          return       <-- not same case as above, but still OK since
|                           core mm already relinq lock for FAULT_RETRY
|    ...
|
|   < Now falls through for bug case above >
|
|   up_read() <-- lock relinquished

Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARC: show_regs: lockdep: re-enable preemption

[ Upstream commit f731a8e89f8c78985707c626680f3e24c7a60772 ]

signal handling core calls show_regs() with preemption disabled which
on ARC takes mmap_sem for mm/vma access, causing lockdep splat.

| [ARCLinux]# ./segv-null-ptr
| potentially unexpected fatal signal 11.
| BUG: sleeping function called from invalid context at kernel/fork.c:1011
| in_atomic(): 1, irqs_disabled(): 0, pid: 70, name: segv-null-ptr
| no locks held by segv-null-ptr/70.
| CPU: 0 PID: 70 Comm: segv-null-ptr Not tainted 4.18.0+ #69
|
| Stack Trace:
|  arc_unwind_core+0xcc/0x100
|  ___might_sleep+0x17a/0x190
|  mmput+0x16/0xb8
|  show_regs+0x52/0x310
|  get_signal+0x5ee/0x610
|  do_signal+0x2c/0x218
|  resume_user_mode_begin+0x90/0xd8

Workaround by re-enabling preemption temporarily.

Note that the preemption disabling in core code around show_regs()
was introduced by commit 3a9f84d354ce ("signals, debug: fix BUG: using
smp_processor_id() in preemptible code in print_fatal_signal()")

to silence a differnt lockdep seen on x86 bakc in 2009.

Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: vim2m: only cancel work if it is for right context

[ Upstream commit 240809ef6630a4ce57c273c2d79ffb657cd361eb ]

cancel_delayed_work_sync() was called for any queue, but it should only
be called for the queue that is associated with the currently running job.

Otherwise, if two filehandles are streaming at the same time, then closing the
first will cancel the work which might still be running for a job from the
second filehandle. As a result the second filehandle will never be able to
finish the job and an attempt to stop streaming on that second filehandle will
stall.

Fixes: 52117be68b82 ("media: vim2m: use cancel_delayed_work_sync instead of flush_schedule_work")

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: <stable@vger.kernel.org> # for v4.20 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: Use real device structure to verify dev extent

[ Upstream commit 1b3922a8bc74231f9a767d1be6d9a061a4d4eeab ]

[BUG]
Linux v5.0-rc1 will fail fstests/btrfs/163 with the following kernel
message:

  BTRFS error (device dm-6): dev extent devid 1 physical offset 13631488 len 8388608 is beyond device boundary 0
  BTRFS error (device dm-6): failed to verify dev extents against chunks: -117
  BTRFS error (device dm-6): open_ctree failed

[CAUSE]
Commit cf90d884b347 ("btrfs: Introduce mount time chunk <-> dev extent
mapping check") introduced strict check on dev extents.

We use btrfs_find_device() with dev uuid and fs uuid set to NULL, and
only dependent on @devid to find the real device.

For seed devices, we call clone_fs_devices() in open_seed_devices() to
allow us search seed devices directly.

However clone_fs_devices() just populates devices with devid and dev
uuid, without populating other essential members, like disk_total_bytes.

This makes any device returned by btrfs_find_device(fs_info, devid,
NULL, NULL) is just a dummy, with 0 disk_total_bytes, and any dev
extents on the seed device will not pass the device boundary check.

[FIX]
This patch will try to verify the device returned by btrfs_find_device()
and if it's a dummy then re-search in seed devices.

Fixes: cf90d884b347 ("btrfs: Introduce mount time chunk <-> dev extent mapping check")
CC: stable@vger.kernel.org # 4.19+
Reported-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: volumes: Make sure no dev extent is beyond device boundary

[ Upstream commit 05a37c48604c19b50873fd9663f9140c150469d1 ]

Add extra dev extent end check against device boundary.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

powerpc/pkeys: Fix handling of pkey state across fork()

[ Upstream commit 2cd4bd192ee94848695c1c052d87913260e10f36 ]

Protection key tracking information is not copied over to the
mm_struct of the child during fork(). This can cause the child to
erroneously allocate keys that were already allocated. Any allocated
execute-only key is lost aswell.

Add code; called by dup_mmap(), to copy the pkey state from parent to
child explicitly.

This problem was originally found by Dave Hansen on x86, which turns
out to be a problem on powerpc aswell.

Fixes: cf43d3b26452 ("powerpc: Enable pkey subsystem")
Cc: stable@vger.kernel.org # v4.16+
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scsi: megaraid_sas: Use 63-bit DMA addressing

[ Upstream commit 894169db12463cea08d0e2a9e35f42b291340e5a ]

Although MegaRAID controllers support 64-bit DMA addressing, as per
hardware design, DMA address with all 64-bits set
(0xFFFFFFFF-FFFFFFFF) results in a firmware fault.

Driver will set 63-bit DMA mask to ensure the above address will not be
used.

Cc: stable@vger.kernel.org
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scsi: megaraid_sas: Add check for reset adapter bit

[ Upstream commit de93b40d98ead27ee2f7f7df93fdd4914a6c8d8d ]

For SAS3 and later controllers, FW sets the reset adapter bit indicating
the driver to perform a controller reset.  Driver needs to check if this
bit is set before doing a reset.  This reduces the driver probe failure
time to 180seconds in case there is a faulty controller connected.

Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scsi: megaraid_sas: Fix combined reply queue mode detection

[ Upstream commit e29c322133472628c6de85efb99ccd3b3df5571e ]

For Invader series, if FW supports more than 8 MSI-x vectors, driver needs
to enable combined reply queue mode. For Ventura series, driver enables
combined reply queue mode in case of more than 16 MSI-x vectors.

Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: Fix error handling in btrfs_cleanup_ordered_extents

[ Upstream commit d1051d6ebf8ef3517a5a3cf82bba8436d190f1c2 ]

Running btrfs/124 in a loop hung up on me sporadically with the
following call trace:

btrfs           D    0  5760   5324 0x00000000
Call Trace:
 ? __schedule+0x243/0x800
 schedule+0x33/0x90
 btrfs_start_ordered_extent+0x10c/0x1b0 [btrfs]
 ? wait_woken+0xa0/0xa0
 btrfs_wait_ordered_range+0xbb/0x100 [btrfs]
 btrfs_relocate_block_group+0x1ff/0x230 [btrfs]
 btrfs_relocate_chunk+0x49/0x100 [btrfs]
 btrfs_balance+0xbeb/0x1740 [btrfs]
 btrfs_ioctl_balance+0x2ee/0x380 [btrfs]
 btrfs_ioctl+0x1691/0x3110 [btrfs]
 ? lockdep_hardirqs_on+0xed/0x180
 ? __handle_mm_fault+0x8e7/0xfb0
 ? _raw_spin_unlock+0x24/0x30
 ? __handle_mm_fault+0x8e7/0xfb0
 ? do_vfs_ioctl+0xa5/0x6e0
 ? btrfs_ioctl_get_supported_features+0x30/0x30 [btrfs]
 do_vfs_ioctl+0xa5/0x6e0
 ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
 ksys_ioctl+0x3a/0x70
 __x64_sys_ioctl+0x16/0x20
 do_syscall_64+0x60/0x1b0
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

This happens because during page writeback it's valid for
writepage_delalloc to instantiate a delalloc range which doesn't belong
to the page currently being written back.

The reason this case is valid is due to find_lock_delalloc_range
returning any available range after the passed delalloc_start and
ignoring whether the page under writeback is within that range.

In turn ordered extents (OE) are always created for the returned range
from find_lock_delalloc_range. If, however, a failure occurs while OE
are being created then the clean up code in btrfs_cleanup_ordered_extents
will be called.

Unfortunately the code in btrfs_cleanup_ordered_extents doesn't consider
the case of such 'foreign' range being processed and instead it always
assumes that the range OE are created for belongs to the page. This
leads to the first page of such foregin range to not be cleaned up since
it's deliberately missed and skipped by the current cleaning up code.

Fix this by correctly checking whether the current page belongs to the
range being instantiated and if so adjsut the range parameters passed
for cleaning up. If it doesn't, then just clean the whole OE range
directly.

Fixes: 524272607e88 ("btrfs: Handle delalloc error correctly to avoid ordered extent hang")
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

btrfs: Remove extent_io_ops::fill_delalloc

[ Upstream commit 5eaad97af8aeff38debe7d3c69ec3a0d71f8350f ]

This callback is called only from writepage_delalloc which in turn is
guaranteed to be called from the data page writeout path. In the end
there is no reason to have the call to this function to be indrected via
the extent_io_ops structure. This patch removes the callback definition,
exports the function and calls it directly. No functional changes.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ rename to btrfs_run_delalloc_range ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Btrfs: fix deadlock with memory reclaim during scrub

[ Upstream commit a5fb11429167ee6ddeeacc554efaf5776b36433a ]

When a transaction commit starts, it attempts to pause scrub and it blocks
until the scrub is paused. So while the transaction is blocked waiting for
scrub to pause, we can not do memory allocation with GFP_KERNEL from scrub,
otherwise we risk getting into a deadlock with reclaim.

Checking for scrub pause requests is done early at the beginning of the
while loop of scrub_stripe() and later in the loop, scrub_extent() and
scrub_raid56_parity() are called, which in turn call scrub_pages() and
scrub_pages_for_parity() respectively. These last two functions do memory
allocations using GFP_KERNEL. Same problem could happen while scrubbing
the super blocks, since it calls scrub_pages().

We also can not have any of the worker tasks, created by the scrub task,
doing GFP_KERNEL allocations, because before pausing, the scrub task waits
for all the worker tasks to complete (also done at scrub_stripe()).

So make sure GFP_NOFS is used for the memory allocations because at any
time a scrub pause request can happen from another task that started to
commit a transaction.

Fixes: 58c4e173847a ("btrfs: scrub: use GFP_KERNEL on the submission path")
CC: stable@vger.kernel.org # 4.6+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Btrfs: clean up scrub is_dev_replace parameter

[ Upstream commit 32934280967d00dc2b5c4d3b63b21a9c8638326e ]

struct scrub_ctx has an ->is_dev_replace member, so there's no point in
passing around is_dev_replace where sctx is available.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: PPC: Book3S HV: Fix race between kvm_unmap_hva_range and MMU mode switch

[ Upstream commit 234ff0b729ad882d20f7996591a964965647addf ]

Testing has revealed an occasional crash which appears to be caused
by a race between kvmppc_switch_mmu_to_hpt and kvm_unmap_hva_range_hv.
The symptom is a NULL pointer dereference in __find_linux_pte() called
from kvm_unmap_radix() with kvm->arch.pgtable == NULL.

Looking at kvmppc_switch_mmu_to_hpt(), it does indeed clear
kvm->arch.pgtable (via kvmppc_free_radix()) before setting
kvm->arch.radix to NULL, and there is nothing to prevent
kvm_unmap_hva_range_hv() or the other MMU callback functions from
being called concurrently with kvmppc_switch_mmu_to_hpt() or
kvmppc_switch_mmu_to_radix().

This patch therefore adds calls to spin_lock/unlock on the kvm->mmu_lock
around the assignments to kvm->arch.radix, and makes sure that the
partition-scoped radix tree or HPT is only freed after changing
kvm->arch.radix.

This also takes the kvm->mmu_lock in kvmppc_rmap_reset() to make sure
that the clearing of each rmap array (one per memslot) doesn't happen
concurrently with use of the array in the kvm_unmap_hva_range_hv()
or the other MMU callbacks.

Fixes: 18c3640cefc7 ("KVM: PPC: Book3S HV: Add infrastructure for running HPT guests on radix host")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Cleanup gt powerstate from gem

[ Upstream commit 30b710840e4b9c9699d3d4b33fb19ad8880d4614 ]

Since the gt powerstate is allocated by i915_gem_init, clean it from
i915_gem_fini for symmetry and to correct the imbalance on error.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180812223642.24865-1-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Restore sane defaults for KMS on GEM error load

[ Upstream commit 7ed43df720c007d60bee6d81da07bcdc7e4a55ae ]

If we fail during GEM initialisation, we scrub the HW state by
performing a device level GPU resuet. However, we want to leave the
system in a usable state (with functioning KMS but no GEM) so after
scrubbing the HW state, we need to restore some sane defaults and
re-enable the low-level common parts of the GPU (such as the GMCH).

v2: Restore GTT entries.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726085033.4044-2-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: vim2m: use cancel_delayed_work_sync instead of flush_schedule_work

[ Upstream commit 52117be68b82ee05c96da0a7beec319906ccf6cc ]

The use of flush_schedule_work() made no sense and caused a syzkaller error.
Replace with the correct cancel_delayed_work_sync().

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+69780d144754b8071f4b@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # for v4.20 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: vim2m: use workqueue

[ Upstream commit 144bd0ee304c7d0690eec285aee93019d3f30fc8 ]

v4l2_ctrl uses mutexes, so we can't setup a ctrl_handler in
interrupt context. Switch to a workqueue instead and drop the timer.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

s390/zcrypt: reinit ap queue state machine during device probe

[ Upstream commit 104f708fd1241b22f808bdf066ab67dc5a051de5 ]

Until the vfio-ap driver came into live there was a well known
agreement about the way how ap devices are initialized and their
states when the driver's probe function is called.

However, the vfio device driver when receiving an ap queue device does
additional resets thereby removing the registration for interrupts for
the ap device done by the ap bus core code. So when later the vfio
driver releases the device and one of the default zcrypt drivers takes
care of the device the interrupt registration needs to get
renewed. The current code does no renew and result is that requests
send into such a queue will never see a reply processed - the
application hangs.

This patch adds a function which resets the aq queue state machine for
the ap queue device and triggers the walk through the initial states
(which are reset and registration for interrupts). This function is
now called before the driver's probe function is invoked.

When the association between driver and device is released, the
driver's remove function is called. The current implementation calls a
ap queue function ap_queue_remove(). This invokation has been moved to
the ap bus function to make the probe / remove pair for ap bus and
drivers more symmetric.

Fixes: 7e0bdbe5c21c ("s390/zcrypt: AP bus support for alternate driver(s)")
Cc: stable@vger.kernel.org # 4.19+
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewd-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewd-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: davinci: dm644x: define gpio interrupts as separate resources

[ Upstream commit adcf60ce14c8250761af9de907eb6c7d096c26d3 ]

Since commit eb3744a2dd01 ("gpio: davinci: Do not assume continuous
IRQ numbering") the davinci GPIO driver fails to probe if we boot
in legacy mode from any of the board files. Since the driver now
expects every interrupt to be defined as a separate resource, split
the definition of IRQ resources instead of having a single continuous
interrupt range.

Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: davinci: dm355: define gpio interrupts as separate resources

[ Upstream commit 27db7baab640ea28d7994eda943fef170e347081 ]

Since commit eb3744a2dd01 ("gpio: davinci: Do not assume continuous
IRQ numbering") the davinci GPIO driver fails to probe if we boot
in legacy mode from any of the board files. Since the driver now
expects every interrupt to be defined as a separate resource, split
the definition of IRQ resources instead of having a single continuous
interrupt range.

Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: davinci: dm646x: define gpio interrupts as separate resources

[ Upstream commit 2c9c83491f30afbce25796e185cd4d5e36080e31 ]

Since commit eb3744a2dd01 ("gpio: davinci: Do not assume continuous
IRQ numbering") the davinci GPIO driver fails to probe if we boot
in legacy mode from any of the board files. Since the driver now
expects every interrupt to be defined as a separate resource, split
the definition of IRQ resources instead of having a single continuous
interrupt range.

Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: davinci: dm365: define gpio interrupts as separate resources

[ Upstream commit 193c04374e281a56c7d4f96e66d329671945bebe ]

Since commit eb3744a2dd01 ("gpio: davinci: Do not assume continuous
IRQ numbering") the davinci GPIO driver fails to probe if we boot
in legacy mode from any of the board files. Since the driver now
expects every interrupt to be defined as a separate resource, split
the definition of IRQ resources instead of having a single continuous
interrupt range.

Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

ARM: davinci: da8xx: define gpio interrupts as separate resources

[ Upstream commit 58a0afbf4c99ac355df16773af835b919b9432ee ]

Since commit eb3744a2dd01 ("gpio: davinci: Do not assume continuous
IRQ numbering") the davinci GPIO driver fails to probe if we boot
in legacy mode from any of the board files. Since the driver now
expects every interrupt to be defined as a separate resource, split
the definition of IRQ resources instead of having a single continuous
interrupt range.

Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amd/dm: Understand why attaching path/tile properties are needed

[ Upstream commit 04ac4b0ed412f65230b456fcd9aa07e13befff89 ]

Path property is used for userspace to know what MST connector goes to what actual DRM DisplayPort connector, the tiling property is for tiling configurations. Not sure what else there is to figure out.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amd/pp: Fix truncated clock value when set watermark

[ Upstream commit 4d454e9ffdb1ef5a51ebc147b5389c96048db683 ]

the clk value should be tranferred to MHz first and
then transfer to uint16. otherwise, the clock value
will be truncated.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

powerplay: Respect units on max dcfclk watermark

[ Upstream commit f191415b24a3ad3fa22088af7cd7fc328a2f469f ]

In a refactor, the watermark clock inputs to
powerplay from DC were changed from units of 10kHz to
kHz clocks.

One division by 100 was not converted into a division
by 1000.

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Drivers: hv: kvp: Fix the recent regression caused by incorrect clean-up

[ Upstream commit e670de54c813b5bc3672dd1c67871dc60e9206f4 ]

In kvp_send_key(), we do need call process_ib_ipinfo() if
message->kvp_hdr.operation is KVP_OP_GET_IP_INFO, because it turns out
the userland hv_kvp_daemon needs the info of operation, adapter_id and
addr_family. With the incorrect fc62c3b1977d, the host can't get the
VM's IP via KVP.

And, fc62c3b1977d added a "break;", but actually forgot to initialize
the key_size/value in the case of KVP_OP_SET, so the default key_size of
0 is passed to the kvp daemon, and the pool files
/var/lib/hyperv/.kvp_pool_* can't be updated.

This patch effectively rolls back the previous fc62c3b1977d, and
correctly fixes the "this statement may fall through" warnings.

This patch is tested on WS 2012 R2 and 2016.

Fixes: fc62c3b1977d ("Drivers: hv: kvp: Fix two "this statement may fall through" warnings")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Drivers: hv: kvp: Fix the indentation of some "break" statements

[ Upstream commit d544c22d6951be3386ac59bb9a99c9bc566b3f09 ]

No functional change.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/atomic_helper: Disallow new modesets on unregistered connectors

[ Upstream commit 4d80273976bf880c4bed9359b8f2d45663140c86 ]

With the exception of modesets which would switch the DPMS state of a
connector from on to off, we want to make sure that we disallow all
modesets which would result in enabling a new monitor or a new mode
configuration on a monitor if the connector for the display in question
is no longer registered. This allows us to stop userspace from trying to
enable new displays on connectors for an MST topology that were just
removed from the system, without preventing userspace from disabling
DPMS on those connectors.

Changes since v5:
- Fix typo in comment, nothing else

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20181008232437.5571-2-lyude@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915/gen9+: Fix initial readout for Y tiled framebuffers

[ Upstream commit 914a4fd8cd28016038ce749a818a836124a8d270 ]

If BIOS configured a Y tiled FB we failed to set up the backing object
tiling accordingly, leading to a lack of GT fence installed and a
garbled console.

The problem was bisected to
commit 011f22eb545a ("drm/i915: Do NOT skip the first 4k of stolen memory for pre-allocated buffers v2")
but it just revealed a pre-existing issue.

Kudos to Ville who suspected a missing fence looking at the corruption
on the screen.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: <ronald@innovation.ch>
Cc: <stable@vger.kernel.org>
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-by: <ronald@innovation.ch>
Tested-by: <ronald@innovation.ch>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108264
Fixes: bc8d7dffacb1 ("drm/i915/skl: Provide a Skylake version of get_plane_config()")
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181016160011.28347-1-imre.deak@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Rename PLANE_CTL_DECOMPRESSION_ENABLE

[ Upstream commit 53867b46fa8443713b3aee520d6ca558b222d829 ]

Rename PLANE_CTL_DECOMPRESSION_ENABLE to resemble the bpsec name -
PLANE_CTL_RENDER_DECOMPRESSION_ENABLE

Suggested-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180822015053.1420-2-dhinakaran.pandiyan@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Fix intel_dp_mst_best_encoder()

[ Upstream commit a9f9ca33d1fe9325f414914be526c0fc4ba5281c ]

Currently, i915 appears to rely on blocking modesets on
no-longer-present MSTB ports by simply returning NULL for
->best_encoder(), which in turn causes any new atomic commits that don't
disable the CRTC to fail. This is wrong however, since we still want to
allow userspace to disable CRTCs on no-longer-present MSTB ports by
changing the DPMS state to off and this still requires that we retrieve
an encoder.

So, fix this by always returning a valid encoder regardless of the state
of the MST port.

Changes since v1:
- Remove mst atomic helper, since this got replaced with a much simpler
  solution

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20181008232437.5571-6-lyude@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

x86/kvm/lapic: preserve gfn_to_hva_cache len on cache reinit

[ Upstream commit a7c42bb6da6b1b54b2e7bd567636d72d87b10a79 ]

vcpu->arch.pv_eoi is accessible through both HV_X64_MSR_VP_ASSIST_PAGE and
MSR_KVM_PV_EOI_EN so on migration userspace may try to restore them in any
order. Values match, however, kvm_lapic_enable_pv_eoi() uses different
length: for Hyper-V case it's the whole struct hv_vp_assist_page, for KVM
native case it is 8. In case we restore KVM-native MSR last cache will
be reinitialized with len=8 so trying to access VP assist page beyond
8 bytes with kvm_read_guest_cached() will fail.

Check if we re-initializing cache for the same address and preserve length
in case it was greater.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: hyperv: define VP assist page helpers

[ Upstream commit 72bbf9358c3676bd89dc4bd8fb0b1f2a11c288fc ]

The state related to the VP assist page is still managed by the LAPIC
code in the pv_eoi field.

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: hyperv: keep track of mismatched VP indexes

[ Upstream commit 87ee613d076351950b74383215437f841ebbeb75 ]

In most common cases VP index of a vcpu matches its vcpu index. Userspace
is, however, free to set any mapping it wishes and we need to account for
that when we need to find a vCPU with a particular VP index. To keep search
algorithms optimal in both cases introduce 'num_mismatched_vp_indexes'
counter showing how many vCPUs with mismatching VP index we have. In case
the counter is zero we can assume vp_index == vcpu_idx.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: hyperv: consistently use 'hv_vcpu' for 'struct kvm_vcpu_hv' variables

[ Upstream commit 1779a39f786397760ae7a7cc03cf37697d8ae58d ]

Rename 'hv' to 'hv_vcpu' in kvm_hv_set_msr/kvm_hv_get_msr(); 'hv' is
'reserved' for 'struct kvm_hv' variables across the file.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS

[ Upstream commit 9170200ec0ebad70e5b9902bc93e2b1b11456a3b ]

Hyper-V TLFS (5.0b) states:

> Virtual processors are identified by using an index (VP index). The
> maximum number of virtual processors per partition supported by the
> current implementation of the hypervisor can be obtained through CPUID
> leaf 0x40000005. A virtual processor index must be less than the
> maximum number of virtual processors per partition.

Forbid userspace to set VP_INDEX above KVM_MAX_VCPUS. get_vcpu_by_vpidx()
can now be optimized to bail early when supplied vpidx is >= KVM_MAX_VCPUS.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amdgpu: Update gc_9_0 golden settings.

[ Upstream commit c55045adf7210d246a016c961916f078ed31a951 ]

Add mmDB_DEBUG3 settings.

Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/amdgpu/gfx9: Update gfx9 golden settings.

[ Upstream commit 54d682d9a5b357eb711994fa94ef1bc44d7ce9d9 ]

Update the goldensettings for vega20.

Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

remoteproc: qcom: q6v5-mss: add SCM probe dependency

[ Upstream commit bbcda30271752bb7490f2e2aef5411dbcae69116 ]

The memory ownership transfer request is performed using SCM, ensure
that SCM is available before we probe the driver if memory protection is
needed by the subsystem.

Fixes: 6c5a9dc2481b ("remoteproc: qcom: Make secure world call for mem ownership switch")
Cc: stable@vger.kernel.org
Signed-off-by: Brian Norris <briannorris@chromium.org>
[bjorn: Added condition for need_mem_protection, updated commit message]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

x86, hibernate: Fix nosave_regions setup for hibernation

[ Upstream commit cc55f7537db6af371e9c1c6a71161ee40f918824 ]

On 32bit systems, nosave_regions(non RAM areas) located between
max_low_pfn and max_pfn are not excluded from hibernation snapshot
currently, which may result in a machine check exception when
trying to access these unsafe regions during hibernation:

[  612.800453] Disabling lock debugging due to kernel taint
[  612.805786] mce: [Hardware Error]: CPU 0: Machine Check Exception: 5 Bank 6: fe00000000801136
[  612.814344] mce: [Hardware Error]: RIP !INEXACT! 60:<00000000d90be566> {swsusp_save+0x436/0x560}
[  612.823167] mce: [Hardware Error]: TSC 1f5939fe276 ADDR dd000000 MISC 30e0000086
[  612.830677] mce: [Hardware Error]: PROCESSOR 0:306c3 TIME 1529487426 SOCKET 0 APIC 0 microcode 24
[  612.839581] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[  612.846394] mce: [Hardware Error]: Machine check: Processor context corrupt
[  612.853380] Kernel panic - not syncing: Fatal machine check
[  612.858978] Kernel Offset: 0x18000000 from 0xc1000000 (relocation range: 0xc0000000-0xf7ffdfff)

This is because on 32bit systems, pages above max_low_pfn are regarded
as high memeory, and accessing unsafe pages might cause expected MCE.
On the problematic 32bit system, there are reserved memory above low
memory, which triggered the MCE:

e820 memory mapping:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000d160cfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d160d000-0x00000000d1613fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000d1614000-0x00000000d1a44fff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d1a45000-0x00000000d1ecffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d1ed0000-0x00000000d7eeafff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d7eeb000-0x00000000d7ffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d8000000-0x00000000d875ffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d8760000-0x00000000d87fffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d8800000-0x00000000d8fadfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d8fae000-0x00000000d8ffffff] ACPI data
[    0.000000] BIOS-e820: [mem 0x00000000d9000000-0x00000000da71bfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000da71c000-0x00000000da7fffff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000da800000-0x00000000dbb8bfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000dbb8c000-0x00000000dbffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000dd000000-0x00000000df1fffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed00000-0x00000000fed03fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000041edfffff] usable

Fix this problem by changing pfn limit from max_low_pfn to max_pfn.
This fix does not impact 64bit system because on 64bit max_low_pfn
is the same as max_pfn.

Signed-off-by: Zhimin Gu <kookoo.gu@intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Drivers: hv: kvp: Fix two "this statement may fall through" warnings

[ Upstream commit fc62c3b1977d62e6374fd6e28d371bb42dfa5c9d ]

We don't need to call process_ib_ipinfo() if message->kvp_hdr.operation is
KVP_OP_GET_IP_INFO in kvp_send_key(), because here we just need to pass on
the op code from the host to the userspace; when the userspace returns
the info requested by the host, we pass the info on to the host in
kvp_respond_to_host() -> process_ob_ipinfo(). BTW, the current buggy code
actually doesn't cause any harm, because only message->kvp_hdr.operation
is used by the userspace, in the case of KVP_OP_GET_IP_INFO.

The patch also adds a missing "break;" in kvp_send_key(). BTW, the current
buggy code actually doesn't cause any harm, because in the case of
KVP_OP_SET, the unexpected fall-through corrupts
message->body.kvp_set.data.key_size, but that is not really used: see
the definition of struct hv_kvp_exchg_msg_value.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h

[ Upstream commit 2ecefa0a15fd0ef88b9cd5d15ceb813008136431 ]

The keyctl_dh_params struct in uapi/linux/keyctl.h contains the symbol
"private" which means that the header file will cause compilation failure
if #included in to a C++ program.  Further, the patch that added the same
struct to the keyutils package named the symbol "priv", not "private".

The previous attempt to fix this (commit 8a2336e549d3) did so by simply
renaming the kernel's copy of the field to dh_private, but this then breaks
existing userspace and as such has been reverted (commit 8c0f9f5b309d).

[And note, to those who think that wrapping the struct in extern "C" {}
 will work: it won't; that only changes how symbol names are presented to
 the assembler and linker.].

Instead, insert an anonymous union around the "private" member and add a
second member in there with the name "priv" to match the one in the
keyutils package.  The "private" member is then wrapped in !__cplusplus
cpp-conditionals to hide it from C++.

Fixes: ddbb41148724 ("KEYS: Add KEYCTL_DH_COMPUTE command")
Fixes: 8a2336e549d3 ("uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Randy Dunlap <rdunlap@infradead.org>
cc: Lubomir Rintel <lkundrak@v3.sk>
cc: James Morris <jmorris@namei.org>
cc: Mat Martineau <mathew.j.martineau@linux.intel.com>
cc: Stephan Mueller <smueller@chronox.de>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: stable@vger.kernel.org
Signed-off-by: James Morris <james.morris@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scsi: qla2xxx: Move log messages before issuing command to firmware

[ Upstream commit 9fe278f44b4bc06cc61e33b2af65f87d507d13d0 ]

There is a probability that the SRB structure might have been released by the
time the debug log message dereferences it.  This patch moved the log messages
before the command is issued to the firmware to prevent unknown behavior and
kernel crash

Fixes: 726b85487067 ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: cec: remove cec-edid.c

[ Upstream commit f94d463f1b7f83d465ed77521821583dbcdaa3c5 ]

Move cec_get_edid_phys_addr() to cec-adap.c. It's not worth keeping
a separate source for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org> # for v4.17 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: cec/v4l2: move V4L2 specific CEC functions to V4L2

[ Upstream commit 9cfd2753f8f3923f89cbb15f940f3aa0e7202d3e ]

Several CEC functions are actually specific for use with receivers,
i.e. they should be part of the V4L2 subsystem, not CEC.

These functions deal with validating and modifying EDIDs for (HDMI)
receivers, and they do not actually have anything to do with the CEC
subsystem and whether or not CEC is enabled. The problem was that if
the CEC_CORE config option was not set, then these functions would
become stubs, but that's not right: they should always be valid.

So replace the cec_ prefix by v4l2_ and move them to v4l2-dv-timings.c.
Update all drivers that call these accordingly.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: <stable@vger.kernel.org> # for v4.17 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"

[ Upstream commit 3cf71bc9904d7ee4a25a822c5dcb54c7804ea388 ]

This re-applies the workaround for "some DP sinks, [which] are a
little nuts" from commit 1a36147bb939 ("drm/i915: Perform link
quality check unconditionally during long pulse").
It makes the secondary AOC E2460P monitor connected via DP to an
acer Veriton N4640G usable again.

This hunk was dropped in commit c85d200e8321 ("drm/i915: Move SST
DP link retraining into the ->post_hotplug() hook")

Fixes: c85d200e8321 ("drm/i915: Move SST DP link retraining into the ->post_hotplug() hook")
[Cleaned up commit message, added stable cc]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Jan-Marek Glogowski <glogow@fbihome.de>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180825191035.3945-1-lyude@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

kernel/module: Fix mem leak in module_add_modinfo_attrs

[ Upstream commit bc6f2a757d525e001268c3658bd88822e768f8db ]

In module_add_modinfo_attrs if sysfs_create_file
fails, we forget to free allocated modinfo_attrs
and roll back the sysfs files.

Fixes: 03e88ae1b13d ("[PATCH] fix module sysfs files reference counting")
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

modules: always page-align module section allocations

[ Upstream commit 38f054d549a869f22a02224cd276a27bf14b6171 ]

Some arches (e.g., arm64, x86) have moved towards non-executable
module_alloc() allocations for security hardening reasons. That means
that the module loader will need to set the text section of a module to
executable, regardless of whether or not CONFIG_STRICT_MODULE_RWX is set.

When CONFIG_STRICT_MODULE_RWX=y, module section allocations are always
page-aligned to handle memory rwx permissions. On some arches with
CONFIG_STRICT_MODULE_RWX=n however, when setting the module text to
executable, the BUG_ON() in frob_text() gets triggered since module
section allocations are not page-aligned when CONFIG_STRICT_MODULE_RWX=n.
Since the set_memory_* API works with pages, and since we need to call
set_memory_x() regardless of whether CONFIG_STRICT_MODULE_RWX is set, we
might as well page-align all module section allocations for ease of
managing rwx permissions of module sections (text, rodata, etc).

Fixes: 2eef1399a866 ("modules: fix BUG when load module with rodata=n")
Reported-by: Martin Kaiser <lists@kaiser.cx>
Reported-by: Bartosz Golaszewski <brgl@bgdev.pl>
Tested-by: David Lechner <david@lechnology.com>
Tested-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

remoteproc: qcom: q6v5: shore up resource probe handling

[ Upstream commit 1e2517d126171a41f801738ffd19687836cd178a ]

Commit d5269c4553a6 ("remoteproc: qcom: q6v5: Propagate EPROBE_DEFER")
fixed up our probe code to handle -EPROBE_DEFER, but it ignored one of
our interrupts, and it also didn't really handle all the other error
codes you might get (e.g., with a bad DT definition). Handle those all
explicitly.

Fixes: d5269c4553a6 ("remoteproc: qcom: q6v5: Propagate EPROBE_DEFER")
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

clk: s2mps11: Add used attribute to s2mps11_dt_match

[ Upstream commit 9c940bbe2bb47e03ca5e937d30b6a50bf9c0e671 ]

Clang warns after commit 8985167ecf57 ("clk: s2mps11: Fix matching when
built as module and DT node contains compatible"):

drivers/clk/clk-s2mps11.c:242:34: warning: variable 's2mps11_dt_match'
is not needed and will not be emitted [-Wunneeded-internal-declaration]
static const struct of_device_id s2mps11_dt_match[] = {
                                 ^
1 warning generated.

This warning happens when a variable is used in some construct that
doesn't require a reference to that variable to be emitted in the symbol
table; in this case, it's MODULE_DEVICE_TABLE, which only needs to hold
the data of the variable, not the variable itself.

$ nm -S drivers/clk/clk-s2mps11.o | rg s2mps11_dt_match
00000078 000003d4 R __mod_of__s2mps11_dt_match_device_table

Normally, with device ID table variables, it means that the variable
just needs to be tied to the device declaration at the bottom of the
file, like s2mps11_clk_id:

$ nm -S drivers/clk/clk-s2mps11.o | rg s2mps11_clk_id
00000000 00000078 R __mod_platform__s2mps11_clk_id_device_table
00000000 00000078 r s2mps11_clk_id

However, because the comment above this deliberately doesn't want this
variable added to .of_match_table, we need to mark s2mps11_dt_match as
__used to silence this warning. This makes it clear to Clang that the
variable is used for something, even if a reference to it isn't being
emitted.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes: 8985167ecf57 ("clk: s2mps11: Fix matching when built as module and DT node contains compatible")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

nvme-fc: use separate work queue to avoid warning

[ Upstream commit 8730c1ddb69bdeeb10c1f613a4e15e95862b1981 ]

When tearing down a controller the following warning is issued:

WARNING: CPU: 0 PID: 30681 at ../kernel/workqueue.c:2418 check_flush_dependency

This happens as the err_work workqueue item is scheduled on the
system workqueue (which has WQ_MEM_RECLAIM not set), but is flushed
from a workqueue which has WQ_MEM_RECLAIM set.

Fix this by providing an FC-NVMe specific workqueue.

Fixes: 4cff280a5fcc ("nvme-fc: resolve io failures during connect")
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

riscv: remove unused variable in ftrace

[ Upstream commit 397182e0db56b8894a43631ce72de14d90a29834 ]

Noticed while building kernel-4.20.0-0.rc5.git2.1.fc30 for
Fedora 30/RISCV.

[..]
BUILDSTDERR: arch/riscv/kernel/ftrace.c: In function 'prepare_ftrace_return':
BUILDSTDERR: arch/riscv/kernel/ftrace.c:135:6: warning: unused variable 'err' [-Wunused-variable]
BUILDSTDERR:   int err;
BUILDSTDERR:       ^~~
[..]

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
Fixes: e949b6db51dc1 ("riscv/function_graph: Simplify with function_graph_enter()")
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scripts/decode_stacktrace: match basepath using shell prefix operator, not regex

[ Upstream commit 31013836a71e07751a6827f9d2ad41ef502ddaff ]

The basepath may contain special characters, which would confuse the regex
matcher.  ${var#prefix} does the right thing.

Link: http://lkml.kernel.org/r/20190518055946.181563-1-drinkcat@chromium.org
Fixes: 67a28de47faa8358 ("scripts/decode_stacktrace: only strip base path when a prefix of the path")
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64

[ Upstream commit 26e2d7b03ea7ff254bf78305aa44dda62e70b78e ]

After commit ef05bcb60c1a, boot from USB drives is broken.
Fix this problem by enabling usb-host regulators during boot time.

Fixes: ef05bcb60c1a ("arm64: dts: rockchip: fix vcc_host1_5v pin assign on rk3328-rock64")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Voytik <voytikd@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

media: stm32-dcmi: fix irq = 0 case

[ Upstream commit dbb9fcc8c2d8d4ea1104f51d4947a8a8199a2cb5 ]

Manage the irq = 0 case, where we shall return an error.

Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Reported-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

powerpc/64: mark start_here_multiplatform as __ref

[ Upstream commit 9c4e4c90ec24652921e31e9551fcaedc26eec86d ]

Otherwise, the following warning is encountered:

WARNING: vmlinux.o(.text+0x3dc6): Section mismatch in reference from the variable start_here_multiplatform to the function .init.text:.early_setup()
The function start_here_multiplatform() references
the function __init .early_setup().
This is often because start_here_multiplatform lacks a __init
annotation or the annotation of .early_setup is wrong.

Fixes: 56c46bba9bbf ("powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX")
Cc: Russell Currey <ruscur@russell.cc>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

x86/ftrace: Fix warning and considate ftrace_jmp_replace() and ftrace_call_replace()

[ Upstream commit 745cfeaac09ce359130a5451d90cb0bd4094c290 ]

Arnd reported the following compiler warning:

arch/x86/kernel/ftrace.c:669:23: error: 'ftrace_jmp_replace' defined but not used [-Werror=unused-function]

The ftrace_jmp_replace() function now only has a single user and should be
simply moved by that user. But looking at the code, it shows that
ftrace_jmp_replace() is similar to ftrace_call_replace() except that instead
of using the opcode of 0xe8 it uses 0xe9. It makes more sense to consolidate
that function into one implementation that both ftrace_jmp_replace() and
ftrace_call_replace() use by passing in the op code separate.

The structure in ftrace_code_union is also modified to replace the "e8"
field with the more appropriate name "op".

Cc: stable@vger.kernel.org
Reported-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/20190304200748.1418790-1-arnd@arndb.de
Fixes: d2a68c4effd8 ("x86/ftrace: Do not call function graph from dynamic trampolines")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

selftests: fib_rule_tests: use pre-defined DEV_ADDR

[ Upstream commit 34632975cafdd07ce80e85c2eda4e9c16b5f2faa ]

DEV_ADDR is defined but not used. Use it in address setting.
Do the same with IPv6 for consistency.

Reported-by: David Ahern <dsahern@gmail.com>
Fixes: fc82d93e57e3 ("selftests: fib_rule_tests: fix local IPv4 address typo")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

timekeeping: Use proper ktime_add when adding nsecs in coarse offset

[ Upstream commit 0354c1a3cdf31f44b035cfad14d32282e815a572 ]

While this doesn't actually amount to a real difference, since the macro
evaluates to the same thing, every place else operates on ktime_t using
these functions, so let's not break the pattern.

Fixes: e3ff9c3678b4 ("timekeeping: Repair ktime_get_coarse*() granularity")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190621203249.3909-1-Jason@zx2c4.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

{nl,mac}80211: fix interface combinations on crypto controlled devices

[ Upstream commit e6f4051123fd33901e9655a675b22aefcdc5d277 ]

Commit 33d915d9e8ce ("{nl,mac}80211: allow 4addr AP operation on
crypto controlled devices") has introduced a change which allows
4addr operation on crypto controlled devices (ex: ath10k). This
change has inadvertently impacted the interface combinations logic
on such devices.

General rule is that software interfaces like AP/VLAN should not be
listed under supported interface combinations and should not be
considered during validation of these combinations; because of the
aforementioned change, AP/VLAN interfaces(if present) will be checked
against interfaces supported by the device and blocks valid interface
combinations.

Consider a case where an AP and AP/VLAN are up and running; when a
second AP device is brought up on the same physical device, this AP
will be checked against the AP/VLAN interface (which will not be
part of supported interface combinations of the device) and blocks
second AP to come up.

Add a new API cfg80211_iftype_allowed() to fix the problem, this
API works for all devices with/without SW crypto control.

Signed-off-by: Manikanta Pubbisetty <mpubbise@codeaurora.org>
Fixes: 33d915d9e8ce ("{nl,mac}80211: allow 4addr AP operation on crypto controlled devices")
Link: https://lore.kernel.org/r/1563779690-9716-1-git-send-email-mpubbise@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

blk-iolatency: fix STS_AGAIN handling

[ Upstream commit c9b3007feca018d3f7061f5d5a14cb00766ffe9b ]

The iolatency controller is based on rq_qos. It increments on
rq_qos_throttle() and decrements on either rq_qos_cleanup() or
rq_qos_done_bio(). a3fb01ba5af0 fixes the double accounting issue where
blk_mq_make_request() may call both rq_qos_cleanup() and
rq_qos_done_bio() on REQ_NO_WAIT. So checking STS_AGAIN prevents the
double decrement.

The above works upstream as the only way we can get STS_AGAIN is from
blk_mq_get_request() failing. The STS_AGAIN handling isn't a real
problem as bio_endio() skipping only happens on reserved tag allocation
failures which can only be caused by driver bugs and already triggers
WARN.

However, the fix creates a not so great dependency on how STS_AGAIN can
be propagated. Internally, we (Facebook) carry a patch that kills read
ahead if a cgroup is io congested or a fatal signal is pending. This
combined with chained bios progagate their bi_status to the parent is
not already set can can cause the parent bio to not clean up properly
even though it was successful. This consequently leaks the inflight
counter and can hang all IOs under that blkg.

To nip the adverse interaction early, this removes the rq_qos_cleanup()
callback in iolatency in favor of cleaning up always on the
rq_qos_done_bio() path.

Fixes: a3fb01ba5af0 ("blk-iolatency: only account submitted bios")
Debugged-by: Tejun Heo <tj@kernel.org>
Debugged-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Blk-iolatency: warn on negative inflight IO counter

[ Upstream commit 391f552af213985d3d324c60004475759a7030c5 ]

This is to catch any unexpected negative value of inflight IO counter.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>