Alex Deucher [Tue, 15 Oct 2019 22:08:59 +0000 (18:08 -0400)]
drm/amdgpu/uvd7: fix allocation size in enc ring test (v2)
We need to allocate a large enough buffer for the
session info, otherwise the IB test can overwrite
other memory.
v2: - session info is 128K according to mesa
- use the same session info for create and destroy
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=204241
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Tested-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Alex Deucher [Tue, 15 Oct 2019 22:07:19 +0000 (18:07 -0400)]
drm/amdgpu/uvd6: fix allocation size in enc ring test (v2)
We need to allocate a large enough buffer for the
session info, otherwise the IB test can overwrite
other memory.
v2: - session info is 128K according to mesa
- use the same session info for create and destroy
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=204241
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Tested-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Dave Airlie [Thu, 17 Oct 2019 20:40:05 +0000 (06:40 +1000)]
Merge tag 'drm-misc-fixes-2019-10-17' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
-dma-resv: Change shared_count to post-increment to fix lima crash (Qiang)
-ttm: A couple fixes related to lifetime and restore prefault behavior
(Christian & Thomas)
-panfrost: Fill in missing feature reg values and fix stoppedjob timeouts
(Steven)
Cc: Qiang Yu <yuq825@gmail.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Steven Price <steven.price@arm.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20191017203419.GA142909@art_vandelay
Dave Airlie [Thu, 17 Oct 2019 20:12:05 +0000 (06:12 +1000)]
Merge tag 'drm-fixes-5.4-2019-10-16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
drm-fixes-5.4-2019-10-16:
amdgpu:
- Powerplay fix for SMU7 parts
- Bail earlier when cik/si support is not set to 1
- Fix an SDMA issue on navi
radeon:
- revert a PPC fix which broken x86
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191017022443.3853-1-alexander.deucher@amd.com
Dave Airlie [Thu, 17 Oct 2019 20:10:25 +0000 (06:10 +1000)]
Merge tag 'drm-intel-fixes-2019-10-17' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Display fix on handling VBT information.
- Important circular locking fix
- Fix for preemption vs resubmission on virtual requests
- and a prep patch to make this last one to apply cleanly
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191017135444.GA12255@intel.com
Chris Wilson [Mon, 23 Sep 2019 15:28:42 +0000 (16:28 +0100)]
drm/i915: Fixup preempt-to-busy vs resubmission of a virtual request
As preempt-to-busy leaves the request on the HW as the resubmission is
processed, that request may complete in the background and even cause a
second virtual request to enter queue. This second virtual request
breaks our "single request in the virtual pipeline" assumptions.
Furthermore, as the virtual request may be completed and retired, we
lose the reference the virtual engine assumes is held. Normally, just
removing the request from the scheduler queue removes it from the
engine, but the virtual engine keeps track of its singleton request via
its ve->request. This pointer needs protecting with a reference.
v2: Drop unnecessary motion of rq->engine = owner
Fixes:
22b7a426bbe1 ("drm/i915/execlists: Preempt-to-busy")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190923152844.8914-1-chris@chris-wilson.co.uk
(cherry picked from commit
b647c7df01b75761b4c0b1cb6f4841088c0b1121)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Chris Wilson [Sat, 28 Sep 2019 08:25:46 +0000 (09:25 +0100)]
drm/i915/userptr: Never allow userptr into the mappable GGTT
Daniel Vetter uncovered a nasty cycle in using the mmu-notifiers to
invalidate userptr objects which also happen to be pulled into GGTT
mmaps. That is when we unbind the userptr object (on mmu invalidation),
we revoke all CPU mmaps, which may then recurse into mmu invalidation.
We looked for ways of breaking the cycle, but the revocation on
invalidation is required and cannot be avoided. The only solution we
could see was to not allow such GGTT bindings of userptr objects in the
first place. In practice, no one really wants to use a GGTT mmapping of
a CPU pointer...
Just before Daniel's explosive lockdep patches land in v5.4-rc1, we got
a genuine blip from CI:
<4>[ 246.793958] ======================================================
<4>[ 246.793972] WARNING: possible circular locking dependency detected
<4>[ 246.793989] 5.3.0-gbd6c56f50d15-drmtip_372+ #1 Tainted: G U
<4>[ 246.794003] ------------------------------------------------------
<4>[ 246.794017] kswapd0/145 is trying to acquire lock:
<4>[ 246.794030]
000000003f565be6 (&dev->struct_mutex/1){+.+.}, at: userptr_mn_invalidate_range_start+0x18f/0x220 [i915]
<4>[ 246.794250]
but task is already holding lock:
<4>[ 246.794263]
000000001799cef9 (&anon_vma->rwsem){++++}, at: page_lock_anon_vma_read+0xe6/0x2a0
<4>[ 246.794291]
which lock already depends on the new lock.
<4>[ 246.794307]
the existing dependency chain (in reverse order) is:
<4>[ 246.794322]
-> #3 (&anon_vma->rwsem){++++}:
<4>[ 246.794344] down_write+0x33/0x70
<4>[ 246.794357] __vma_adjust+0x3d9/0x7b0
<4>[ 246.794370] __split_vma+0x16a/0x180
<4>[ 246.794385] mprotect_fixup+0x2a5/0x320
<4>[ 246.794399] do_mprotect_pkey+0x208/0x2e0
<4>[ 246.794413] __x64_sys_mprotect+0x16/0x20
<4>[ 246.794429] do_syscall_64+0x55/0x1c0
<4>[ 246.794443] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[ 246.794456]
-> #2 (&mapping->i_mmap_rwsem){++++}:
<4>[ 246.794478] down_write+0x33/0x70
<4>[ 246.794493] unmap_mapping_pages+0x48/0x130
<4>[ 246.794519] i915_vma_revoke_mmap+0x81/0x1b0 [i915]
<4>[ 246.794519] i915_vma_unbind+0x11d/0x4a0 [i915]
<4>[ 246.794519] i915_vma_destroy+0x31/0x300 [i915]
<4>[ 246.794519] __i915_gem_free_objects+0xb8/0x4b0 [i915]
<4>[ 246.794519] drm_file_free.part.0+0x1e6/0x290
<4>[ 246.794519] drm_release+0xa6/0xe0
<4>[ 246.794519] __fput+0xc2/0x250
<4>[ 246.794519] task_work_run+0x82/0xb0
<4>[ 246.794519] do_exit+0x35b/0xdb0
<4>[ 246.794519] do_group_exit+0x34/0xb0
<4>[ 246.794519] __x64_sys_exit_group+0xf/0x10
<4>[ 246.794519] do_syscall_64+0x55/0x1c0
<4>[ 246.794519] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[ 246.794519]
-> #1 (&vm->mutex){+.+.}:
<4>[ 246.794519] i915_gem_shrinker_taints_mutex+0x6d/0xe0 [i915]
<4>[ 246.794519] i915_address_space_init+0x9f/0x160 [i915]
<4>[ 246.794519] i915_ggtt_init_hw+0x55/0x170 [i915]
<4>[ 246.794519] i915_driver_probe+0xc9f/0x1620 [i915]
<4>[ 246.794519] i915_pci_probe+0x43/0x1b0 [i915]
<4>[ 246.794519] pci_device_probe+0x9e/0x120
<4>[ 246.794519] really_probe+0xea/0x3d0
<4>[ 246.794519] driver_probe_device+0x10b/0x120
<4>[ 246.794519] device_driver_attach+0x4a/0x50
<4>[ 246.794519] __driver_attach+0x97/0x130
<4>[ 246.794519] bus_for_each_dev+0x74/0xc0
<4>[ 246.794519] bus_add_driver+0x13f/0x210
<4>[ 246.794519] driver_register+0x56/0xe0
<4>[ 246.794519] do_one_initcall+0x58/0x300
<4>[ 246.794519] do_init_module+0x56/0x1f6
<4>[ 246.794519] load_module+0x25bd/0x2a40
<4>[ 246.794519] __se_sys_finit_module+0xd3/0xf0
<4>[ 246.794519] do_syscall_64+0x55/0x1c0
<4>[ 246.794519] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[ 246.794519]
-> #0 (&dev->struct_mutex/1){+.+.}:
<4>[ 246.794519] __lock_acquire+0x15d8/0x1e90
<4>[ 246.794519] lock_acquire+0xa6/0x1c0
<4>[ 246.794519] __mutex_lock+0x9d/0x9b0
<4>[ 246.794519] userptr_mn_invalidate_range_start+0x18f/0x220 [i915]
<4>[ 246.794519] __mmu_notifier_invalidate_range_start+0x85/0x110
<4>[ 246.794519] try_to_unmap_one+0x76b/0x860
<4>[ 246.794519] rmap_walk_anon+0x104/0x280
<4>[ 246.794519] try_to_unmap+0xc0/0xf0
<4>[ 246.794519] shrink_page_list+0x561/0xc10
<4>[ 246.794519] shrink_inactive_list+0x220/0x440
<4>[ 246.794519] shrink_node_memcg+0x36e/0x740
<4>[ 246.794519] shrink_node+0xcb/0x490
<4>[ 246.794519] balance_pgdat+0x241/0x580
<4>[ 246.794519] kswapd+0x16c/0x530
<4>[ 246.794519] kthread+0x119/0x130
<4>[ 246.794519] ret_from_fork+0x24/0x50
<4>[ 246.794519]
other info that might help us debug this:
<4>[ 246.794519] Chain exists of:
&dev->struct_mutex/1 --> &mapping->i_mmap_rwsem --> &anon_vma->rwsem
<4>[ 246.794519] Possible unsafe locking scenario:
<4>[ 246.794519] CPU0 CPU1
<4>[ 246.794519] ---- ----
<4>[ 246.794519] lock(&anon_vma->rwsem);
<4>[ 246.794519] lock(&mapping->i_mmap_rwsem);
<4>[ 246.794519] lock(&anon_vma->rwsem);
<4>[ 246.794519] lock(&dev->struct_mutex/1);
<4>[ 246.794519]
*** DEADLOCK ***
v2: Say no to mmap_ioctl
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111744
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111870
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190928082546.3473-1-chris@chris-wilson.co.uk
(cherry picked from commit
a4311745bba9763e3c965643d4531bd5765b0513)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Ville Syrjälä [Fri, 11 Oct 2019 20:20:30 +0000 (23:20 +0300)]
drm/i915: Favor last VBT child device with conflicting AUX ch/DDC pin
The first come first served apporoach to handling the VBT
child device AUX ch conflicts has backfired. We have machines
in the wild where the VBT specifies both port A eDP and
port E DP (in that order) with port E being the real one.
So let's try to flip the preference around and let the last
child device win once again.
Cc: stable@vger.kernel.org
Cc: Jani Nikula <jani.nikula@intel.com>
Tested-by: Masami Ichikawa <masami256@gmail.com>
Tested-by: Torsten <freedesktop201910@liggy.de>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111966
Fixes:
36a0f92020dc ("drm/i915/bios: make child device order the priority order")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191011202030.8829-1-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit
41e35ffb380bde1379e4030bb5b2ac824d5139cf)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Chris Wilson [Mon, 23 Sep 2019 11:00:56 +0000 (12:00 +0100)]
drm/i915/execlists: Refactor -EIO markup of hung requests
Pull setting -EIO on the hung requests into its own utility function.
Having allowed ourselves to short-circuit submission of completed
requests, we can now do the mark_eio() prior to submission and avoid
some redundant operations.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190923110056.15176-4-chris@chris-wilson.co.uk
(cherry picked from commit
0d7cf7bc15e75bf79f2f65d61d19f896609f816a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Steven Price [Wed, 9 Oct 2019 09:44:55 +0000 (10:44 +0100)]
drm/panfrost: Handle resetting on timeout better
Panfrost uses multiple schedulers (one for each slot, so 2 in reality),
and on a timeout has to stop all the schedulers to safely perform a
reset. However more than one scheduler can trigger a timeout at the same
time. This race condition results in jobs being freed while they are
still in use.
When stopping other slots use cancel_delayed_work_sync() to ensure that
any timeout started for that slot has completed. Also use
mutex_trylock() to obtain reset_lock. This means that only one thread
attempts the reset, the other threads will simply complete without doing
anything (the first thread will wait for this in the call to
cancel_delayed_work_sync()).
While we're here and since the function is already dependent on
sched_job not being NULL, let's remove the unnecessary checks.
Fixes:
aa20236784ab ("drm/panfrost: Prevent concurrent resets")
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191009094456.9704-1-steven.price@arm.com
Steven Price [Mon, 14 Oct 2019 15:15:15 +0000 (16:15 +0100)]
drm/panfrost: Add missing GPU feature registers
Three feature registers were declared but never actually read from the
GPU. Add THREAD_MAX_THREADS, THREAD_MAX_WORKGROUP_SIZE and
THREAD_MAX_BARRIER_SIZE so that the complete set are available.
Fixes:
4bced8bea094 ("drm/panfrost: Export all GPU feature registers")
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191014151515.13839-1-steven.price@arm.com
Christian König [Thu, 10 Oct 2019 11:24:17 +0000 (13:24 +0200)]
drm/ttm: fix handling in ttm_bo_add_mem_to_lru
We should not add the BO to the swap LRU when the new mem is fixed and
the TTM object about to be destroyed.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Link: https://patchwork.freedesktop.org/patch/335246/
Thomas Hellstrom [Thu, 12 Sep 2019 18:38:54 +0000 (20:38 +0200)]
drm/ttm: Restore ttm prefaulting
Commit
4daa4fba3a38 ("gpu: drm: ttm: Adding new return type vm_fault_t")
broke TTM prefaulting. Since vmf_insert_mixed() typically always returns
VM_FAULT_NOPAGE, prefaulting stops after the second PTE.
Restore (almost) the original behaviour. Unfortunately we can no longer
with the new vm_fault_t return type determine whether a prefaulting
PTE insertion hit an already populated PTE, and terminate the insertion
loop. Instead we continue with the pre-determined number of prefaults.
Fixes:
4daa4fba3a38 ("gpu: drm: ttm: Adding new return type vm_fault_t")
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/330387/
Christian König [Mon, 23 Sep 2019 08:47:22 +0000 (10:47 +0200)]
drm/ttm: fix busy reference in ttm_mem_evict_first
The busy BO might actually be already deleted,
so grab only a list reference.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Hellström <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/332877/
Linus Torvalds [Sun, 13 Oct 2019 23:37:36 +0000 (16:37 -0700)]
Linux 5.4-rc3
Linus Torvalds [Sun, 13 Oct 2019 21:47:10 +0000 (14:47 -0700)]
Merge tag 'trace-v5.4-rc2' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"A few tracing fixes:
- Remove lockdown from tracefs itself and moved it to the trace
directory. Have the open functions there do the lockdown checks.
- Fix a few races with opening an instance file and the instance
being deleted (Discovered during the lockdown updates). Kept
separate from the clean up code such that they can be backported to
stable easier.
- Clean up and consolidated the checks done when opening a trace
file, as there were multiple checks that need to be done, and it
did not make sense having them done in each open instance.
- Fix a regression in the record mcount code.
- Small hw_lat detector tracer fixes.
- A trace_pipe read fix due to not initializing trace_seq"
* tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Initialize iter->seq after zeroing in tracing_read_pipe()
tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency
tracing/hwlat: Report total time spent in all NMIs during the sample
recordmcount: Fix nop_mcount() function
tracing: Do not create tracefs files if tracefs lockdown is in effect
tracing: Add locked_down checks to the open calls of files created for tracefs
tracing: Add tracing_check_open_get_tr()
tracing: Have trace events system open call tracing_open_generic_tr()
tracing: Get trace_array reference for available_tracers files
ftrace: Get a reference counter for the trace_array on filter files
tracefs: Revert
ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is locked down")
Linus Torvalds [Sun, 13 Oct 2019 15:40:31 +0000 (08:40 -0700)]
Merge tag 'hwmon-for-v5.4-rc3' of git://git./linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Update/fix inspur-ipsps1 and k10temp Documentation
- Fix nct7904 driver
- Fix HWMON_P_MIN_ALARM mask in hwmon core
* tag 'hwmon-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: docs: Extend inspur-ipsps1 title underline
hwmon: (nct7904) Add array fan_alarm and vsen_alarm to store the alarms in nct7904_data struct.
docs: hwmon: Include 'inspur-ipsps1.rst' into docs
hwmon: Fix HWMON_P_MIN_ALARM mask
hwmon: (k10temp) Update documentation and add temp2_input info
hwmon: (nct7904) Fix the incorrect value of vsen_mask in nct7904_data struct
Linus Torvalds [Sun, 13 Oct 2019 15:26:54 +0000 (08:26 -0700)]
Merge tag 'fixes-for-5.4-rc3' of git://git./linux/kernel/git/mtd/linux
Pull MTD fixes from Richard Weinberger:
"Two fixes for MTD:
- spi-nor: Fix for a regression in write_sr()
- rawnand: Regression fix for the au1550nd driver"
* tag 'fixes-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: au1550nd: Fix au_read_buf16() prototype
mtd: spi-nor: Fix direction of the write_sr() transfer
Linus Torvalds [Sun, 13 Oct 2019 15:15:35 +0000 (08:15 -0700)]
Merge tag 'for-linus-
20191012' of git://git.kernel.dk/linux-block
Pull io_uring fix from Jens Axboe:
"Single small fix for a regression in the sequence logic for linked
commands"
* tag 'for-linus-
20191012' of git://git.kernel.dk/linux-block:
io_uring: fix sequence logic for timeout requests
Petr Mladek [Fri, 11 Oct 2019 14:21:34 +0000 (16:21 +0200)]
tracing: Initialize iter->seq after zeroing in tracing_read_pipe()
A customer reported the following softlockup:
[899688.160002] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [test.sh:16464]
[899688.160002] CPU: 0 PID: 16464 Comm: test.sh Not tainted 4.12.14-6.23-azure #1 SLE12-SP4
[899688.160002] RIP: 0010:up_write+0x1a/0x30
[899688.160002] Kernel panic - not syncing: softlockup: hung tasks
[899688.160002] RIP: 0010:up_write+0x1a/0x30
[899688.160002] RSP: 0018:
ffffa86784d4fde8 EFLAGS:
00000257 ORIG_RAX:
ffffffffffffff12
[899688.160002] RAX:
ffffffff970fea00 RBX:
0000000000000001 RCX:
0000000000000000
[899688.160002] RDX:
ffffffff00000001 RSI:
0000000000000080 RDI:
ffffffff970fea00
[899688.160002] RBP:
ffffffffffffffff R08:
ffffffffffffffff R09:
0000000000000000
[899688.160002] R10:
0000000000000000 R11:
0000000000000000 R12:
ffff8b59014720d8
[899688.160002] R13:
ffff8b59014720c0 R14:
ffff8b5901471090 R15:
ffff8b5901470000
[899688.160002] tracing_read_pipe+0x336/0x3c0
[899688.160002] __vfs_read+0x26/0x140
[899688.160002] vfs_read+0x87/0x130
[899688.160002] SyS_read+0x42/0x90
[899688.160002] do_syscall_64+0x74/0x160
It caught the process in the middle of trace_access_unlock(). There is
no loop. So, it must be looping in the caller tracing_read_pipe()
via the "waitagain" label.
Crashdump analyze uncovered that iter->seq was completely zeroed
at this point, including iter->seq.seq.size. It means that
print_trace_line() was never able to print anything and
there was no forward progress.
The culprit seems to be in the code:
/* reset all but tr, trace, and overruns */
memset(&iter->seq, 0,
sizeof(struct trace_iterator) -
offsetof(struct trace_iterator, seq));
It was added by the commit
53d0aa773053ab182877 ("ftrace:
add logic to record overruns"). It was v2.6.27-rc1.
It was the time when iter->seq looked like:
struct trace_seq {
unsigned char buffer[PAGE_SIZE];
unsigned int len;
};
There was no "size" variable and zeroing was perfectly fine.
The solution is to reinitialize the structure after or without
zeroing.
Link: http://lkml.kernel.org/r/20191011142134.11997-1-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Srivatsa S. Bhat (VMware) [Thu, 10 Oct 2019 18:51:01 +0000 (11:51 -0700)]
tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency
max_latency is intended to record the maximum ever observed hardware
latency, which may occur in either part of the loop (inner/outer). So
we need to also consider the outer-loop sample when updating
max_latency.
Link: http://lkml.kernel.org/r/157073345463.17189.18124025522664682811.stgit@srivatsa-ubuntu
Fixes:
e7c15cd8a113 ("tracing: Added hardware latency tracer")
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Srivatsa S. Bhat (VMware) [Thu, 10 Oct 2019 18:50:46 +0000 (11:50 -0700)]
tracing/hwlat: Report total time spent in all NMIs during the sample
nmi_total_ts is supposed to record the total time spent in *all* NMIs
that occur on the given CPU during the (active portion of the)
sampling window. However, the code seems to be overwriting this
variable for each NMI, thereby only recording the time spent in the
most recent NMI. Fix it by accumulating the duration instead.
Link: http://lkml.kernel.org/r/157073343544.17189.13911783866738671133.stgit@srivatsa-ubuntu
Fixes:
7b2c86250122 ("tracing: Add NMI tracing in hwlat detector")
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Wed, 9 Oct 2019 15:05:38 +0000 (11:05 -0400)]
recordmcount: Fix nop_mcount() function
The removal of the longjmp code in recordmcount.c mistakenly made the return
of make_nop() being negative an exit of nop_mcount(). It should not exit the
routine, but instead just not process that part of the code. By exiting with
an error code, it would cause the update of recordmcount to fail some files
which would fail the build if ftrace function tracing was enabled.
Link: http://lkml.kernel.org/r/20191009110538.5909fec6@gandalf.local.home
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes:
3f1df12019f3 ("recordmcount: Rewrite error/success handling")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Sat, 12 Oct 2019 00:41:41 +0000 (20:41 -0400)]
tracing: Do not create tracefs files if tracefs lockdown is in effect
If on boot up, lockdown is activated for tracefs, don't even bother creating
the files. This can also prevent instances from being created if lockdown is
in effect.
Link: http://lkml.kernel.org/r/CAHk-=whC6Ji=fWnjh2+eS4b15TnbsS4VPVtvBOwCy1jjEG_JHQ@mail.gmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 21:22:50 +0000 (17:22 -0400)]
tracing: Add locked_down checks to the open calls of files created for tracefs
Added various checks on open tracefs calls to see if tracefs is in lockdown
mode, and if so, to return -EPERM.
Note, the event format files (which are basically standard on all machines)
as well as the enabled_functions file (which shows what is currently being
traced) are not lockde down. Perhaps they should be, but it seems counter
intuitive to lockdown information to help you know if the system has been
modified.
Link: http://lkml.kernel.org/r/CAHk-=wj7fGPKUspr579Cii-w_y60PtRaiDgKuxVtBAMK0VNNkA@mail.gmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 21:39:57 +0000 (17:39 -0400)]
tracing: Add tracing_check_open_get_tr()
Currently, most files in the tracefs directory test if tracing_disabled is
set. If so, it should return -ENODEV. The tracing_disabled is called when
tracing is found to be broken. Originally it was done in case the ring
buffer was found to be corrupted, and we wanted to prevent reading it from
crashing the kernel. But it's also called if a tracing selftest fails on
boot. It's a one way switch. That is, once it is triggered, tracing is
disabled until reboot.
As most tracefs files can also be used by instances in the tracefs
directory, they need to be carefully done. Each instance has a trace_array
associated to it, and when the instance is removed, the trace_array is
freed. But if an instance is opened with a reference to the trace_array,
then it requires looking up the trace_array to get its ref counter (as there
could be a race with it being deleted and the open itself). Once it is
found, a reference is added to prevent the instance from being removed (and
the trace_array associated with it freed).
Combine the two checks (tracing_disabled and trace_array_get()) into a
single helper function. This will also make it easier to add lockdown to
tracefs later.
Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 23:12:21 +0000 (19:12 -0400)]
tracing: Have trace events system open call tracing_open_generic_tr()
Instead of having the trace events system open call open code the taking of
the trace_array descriptor (with trace_array_get()) and then calling
trace_open_generic(), have it use the tracing_open_generic_tr() that does
the combination of the two. This requires making tracing_open_generic_tr()
global.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 22:19:17 +0000 (18:19 -0400)]
tracing: Get trace_array reference for available_tracers files
As instances may have different tracers available, we need to look at the
trace_array descriptor that shows the list of the available tracers for the
instance. But there's a race between opening the file and an admin
deleting the instance. The trace_array_get() needs to be called before
accessing the trace_array.
Cc: stable@vger.kernel.org
Fixes:
607e2ea167e56 ("tracing: Set up infrastructure to allow tracers for instances")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 21:56:57 +0000 (17:56 -0400)]
ftrace: Get a reference counter for the trace_array on filter files
The ftrace set_ftrace_filter and set_ftrace_notrace files are specific for
an instance now. They need to take a reference to the instance otherwise
there could be a race between accessing the files and deleting the instance.
It wasn't until the :mod: caching where these file operations started
referencing the trace_array directly.
Cc: stable@vger.kernel.org
Fixes:
673feb9d76ab3 ("ftrace: Add :mod: caching infrastructure to trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Steven Rostedt (VMware) [Fri, 11 Oct 2019 17:54:58 +0000 (13:54 -0400)]
tracefs: Revert
ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is locked down")
Running the latest kernel through my "make instances" stress tests, I
triggered the following bug (with KASAN and kmemleak enabled):
mkdir invoked oom-killer:
gfp_mask=0x40cd0(GFP_KERNEL|__GFP_COMP|__GFP_RECLAIMABLE), order=0,
oom_score_adj=0
CPU: 1 PID: 2229 Comm: mkdir Not tainted 5.4.0-rc2-test #325
Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014
Call Trace:
dump_stack+0x64/0x8c
dump_header+0x43/0x3b7
? trace_hardirqs_on+0x48/0x4a
oom_kill_process+0x68/0x2d5
out_of_memory+0x2aa/0x2d0
__alloc_pages_nodemask+0x96d/0xb67
__alloc_pages_node+0x19/0x1e
alloc_slab_page+0x17/0x45
new_slab+0xd0/0x234
___slab_alloc.constprop.86+0x18f/0x336
? alloc_inode+0x2c/0x74
? irq_trace+0x12/0x1e
? tracer_hardirqs_off+0x1d/0xd7
? __slab_alloc.constprop.85+0x21/0x53
__slab_alloc.constprop.85+0x31/0x53
? __slab_alloc.constprop.85+0x31/0x53
? alloc_inode+0x2c/0x74
kmem_cache_alloc+0x50/0x179
? alloc_inode+0x2c/0x74
alloc_inode+0x2c/0x74
new_inode_pseudo+0xf/0x48
new_inode+0x15/0x25
tracefs_get_inode+0x23/0x7c
? lookup_one_len+0x54/0x6c
tracefs_create_file+0x53/0x11d
trace_create_file+0x15/0x33
event_create_dir+0x2a3/0x34b
__trace_add_new_event+0x1c/0x26
event_trace_add_tracer+0x56/0x86
trace_array_create+0x13e/0x1e1
instance_mkdir+0x8/0x17
tracefs_syscall_mkdir+0x39/0x50
? get_dname+0x31/0x31
vfs_mkdir+0x78/0xa3
do_mkdirat+0x71/0xb0
sys_mkdir+0x19/0x1b
do_fast_syscall_32+0xb0/0xed
I bisected this down to the addition of the proxy_ops into tracefs for
lockdown. It appears that the allocation of the proxy_ops and then freeing
it in the destroy_inode callback, is causing havoc with the memory system.
Reading the documentation about destroy_inode and talking with Linus about
this, this is buggy and wrong. When defining the destroy_inode() method, it
is expected that the destroy_inode() will also free the inode, and not just
the extra allocations done in the creation of the inode. The faulty commit
causes a memory leak of the inode data structure when they are deleted.
Instead of allocating the proxy_ops (and then having to free it) the checks
should be done by the open functions themselves, and not hack into the
tracefs directory. First revert the tracefs updates for locked_down and then
later we can add the locked_down checks in the kernel/trace files.
Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home
Fixes:
ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is locked down")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Linus Torvalds [Sat, 12 Oct 2019 22:47:19 +0000 (15:47 -0700)]
Merge tag 'char-misc-5.4-rc3' of git://git./linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes for 5.4-rc3.
Nothing huge here. Some binder driver fixes (although it is still
being discussed if these all fix the reported issues or not, so more
might be coming later), some mei device ids and fixes, and a google
firmware driver bugfix that fixes a regression, as well as some other
tiny fixes.
All have been in linux-next with no reported issues"
* tag 'char-misc-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
firmware: google: increment VPD key_len properly
w1: ds250x: Fix build error without CRC16
virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr
binder: Fix comment headers on binder_alloc_prepare_to_free()
binder: prevent UAF read in print_binder_transaction_log_entry()
misc: fastrpc: prevent memory leak in fastrpc_dma_buf_attach
mei: avoid FW version request on Ibex Peak and earlier
mei: me: add comet point (lake) LP device ids
Linus Torvalds [Sat, 12 Oct 2019 22:44:46 +0000 (15:44 -0700)]
Merge tag 'staging-5.4-rc3' of git://git./linux/kernel/git/gregkh/staging
Pull staging/IIO driver fixes from Greg KH:
"Here are some staging and IIO driver fixes for 5.4-rc3.
The "biggest" thing here is a removal of the fbtft device and flexfb
code as they have been abandoned by their authors and are no longer
needed for that hardware.
Other than that, the usual amount of staging driver and iio driver
fixes for reported issues, and some speakup sysfs file documentation,
which has been long awaited for.
All have been in linux-next with no reported issues"
* tag 'staging-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (32 commits)
iio: Fix an undefied reference error in noa1305_probe
iio: light: opt3001: fix mutex unlock race
iio: adc: ad799x: fix probe error handling
iio: light: add missing vcnl4040 of_compatible
iio: light: fix vcnl4000 devicetree hooks
iio: imu: st_lsm6dsx: fix waitime for st_lsm6dsx i2c controller
iio: adc: axp288: Override TS pin bias current for some models
iio: imu: adis16400: fix memory leak
iio: imu: adis16400: release allocated memory on failure
iio: adc: stm32-adc: fix a race when using several adcs with dma and irq
iio: adc: stm32-adc: move registers definitions
iio: accel: adxl372: Perform a reset at start up
iio: accel: adxl372: Fix push to buffers lost samples
iio: accel: adxl372: Fix/remove limitation for FIFO samples
iio: adc: hx711: fix bug in sampling of data
staging: vt6655: Fix memory leak in vt6655_probe
staging: exfat: Use kvzalloc() instead of kzalloc() for exfat_sb_info
Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc
staging: speakup: document sysfs attributes
staging: rtl8188eu: fix HighestRate check in odm_ARFBRefresh_8188E()
...
Linus Torvalds [Sat, 12 Oct 2019 22:42:19 +0000 (15:42 -0700)]
Merge tag 'tty-5.4-rc3' of git://git./linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small tty and serial driver fixes for 5.4-rc3 that
resolve a number of reported issues and regressions.
None of these are huge, full details are in the shortlog. There's also
a MAINTAINERS update that I think you might have already taken in your
tree already, but git should handle that merge easily.
All have been in linux-next with no reported issues"
* tag 'tty-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
MAINTAINERS: kgdb: Add myself as a reviewer for kgdb/kdb
tty: serial: imx: Use platform_get_irq_optional() for optional IRQs
serial: fix kernel-doc warning in comments
serial: 8250_omap: Fix gpio check for auto RTS/CTS
serial: mctrl_gpio: Check for NULL pointer
tty: serial: fsl_lpuart: Fix lpuart_flush_buffer()
tty: serial: Fix PORT_LINFLEXUART definition
tty: n_hdlc: fix build on SPARC
serial: uartps: Fix uartps_major handling
serial: uartlite: fix exit path null pointer
tty: serial: linflexuart: Fix magic SysRq handling
serial: sh-sci: Use platform_get_irq_optional() for optional interrupts
dt-bindings: serial: sh-sci: Document r8a774b1 bindings
serial/sifive: select SERIAL_EARLYCON
tty: serial: rda: Fix the link time qualifier of 'rda_uart_exit()'
tty: serial: owl: Fix the link time qualifier of 'owl_uart_exit()'
Linus Torvalds [Sat, 12 Oct 2019 22:37:12 +0000 (15:37 -0700)]
Merge tag 'usb-5.4-rc3' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a lot of small USB driver fixes for 5.4-rc3.
syzbot has stepped up its testing of the USB driver stack, now able to
trigger fun race conditions between disconnect and probe functions.
Because of that we have a lot of fixes in here from Johan and others
fixing these reported issues that have been around since almost all
time.
We also are just deleting the rio500 driver, making all of the syzbot
bugs found in it moot as it turns out no one has been using it for
years as there is a userspace version that is being used instead.
There are also a number of other small fixes in here, all resolving
reported issues or regressions.
All have been in linux-next without any reported issues"
* tag 'usb-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (65 commits)
USB: yurex: fix NULL-derefs on disconnect
USB: iowarrior: use pr_err()
USB: iowarrior: drop redundant iowarrior mutex
USB: iowarrior: drop redundant disconnect mutex
USB: iowarrior: fix use-after-free after driver unbind
USB: iowarrior: fix use-after-free on release
USB: iowarrior: fix use-after-free on disconnect
USB: chaoskey: fix use-after-free on release
USB: adutux: fix use-after-free on release
USB: ldusb: fix NULL-derefs on driver unbind
USB: legousbtower: fix use-after-free on release
usb: cdns3: Fix for incorrect DMA mask.
usb: cdns3: fix cdns3_core_init_role()
usb: cdns3: gadget: Fix full-speed mode
USB: usb-skeleton: drop redundant in-urb check
USB: usb-skeleton: fix use-after-free after driver unbind
USB: usb-skeleton: fix NULL-deref on disconnect
usb:cdns3: Fix for CV CH9 running with g_zero driver.
usb: dwc3: Remove dev_err() on platform_get_irq() failure
usb: dwc3: Switch to platform_get_irq_byname_optional()
...
Linus Torvalds [Sat, 12 Oct 2019 22:29:54 +0000 (15:29 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Two fixes: a guest-cputime accounting fix, and a cgroup bandwidth
quota precision fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/vtime: Fix guest/system mis-accounting on task switch
sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision
Linus Torvalds [Sat, 12 Oct 2019 22:15:17 +0000 (15:15 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, but also a couple of updates for new Intel
models (which are technically hw-enablement, but to users it's a fix
to perf behavior on those new CPUs - hope this is fine), an AUX
inheritance fix, event time-sharing fix, and a fix for lost non-perf
NMI events on AMD systems"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
perf/x86/cstate: Add Tiger Lake CPU support
perf/x86/msr: Add Tiger Lake CPU support
perf/x86/intel: Add Tiger Lake CPU support
perf/x86/cstate: Update C-state counters for Ice Lake
perf/x86/msr: Add new CPU model numbers for Ice Lake
perf/x86/cstate: Add Comet Lake CPU support
perf/x86/msr: Add Comet Lake CPU support
perf/x86/intel: Add Comet Lake CPU support
perf/x86/amd: Change/fix NMI latency mitigation to use a timestamp
perf/core: Fix corner case in perf_rotate_context()
perf/core: Rework memory accounting in perf_mmap()
perf/core: Fix inheritance of aux_output groups
perf annotate: Don't return -1 for error when doing BPF disassembly
perf annotate: Return appropriate error code for allocation failures
perf annotate: Fix arch specific ->init() failure errors
perf annotate: Propagate the symbol__annotate() error return
perf annotate: Fix the signedness of failure returns
perf annotate: Propagate perf_env__arch() error
perf evsel: Fall back to global 'perf_env' in perf_evsel__env()
perf tools: Propagate get_cpuid() error
...
Linus Torvalds [Sat, 12 Oct 2019 22:08:24 +0000 (15:08 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"Misc EFI fixes all across the map: CPER error report fixes, fixes to
TPM event log parsing, fix for a kexec hang, a Sparse fix and other
fixes"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/tpm: Fix sanity check of unsigned tbl_size being less than zero
efi/x86: Do not clean dummy variable in kexec path
efi: Make unexported efi_rci2_sysfs_init() static
efi/tpm: Only set 'efi_tpm_final_log_size' after successful event log parsing
efi/tpm: Don't traverse an event log with no events
efi/tpm: Don't access event->count when it isn't mapped
efivar/ssdt: Don't iterate over EFI vars if no SSDT override was specified
efi/cper: Fix endianness of PCIe class code
Linus Torvalds [Sat, 12 Oct 2019 21:46:14 +0000 (14:46 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"A handful of fixes: a kexec linking fix, an AMD MWAITX fix, a vmware
guest support fix when built under Clang, and new CPU model number
definitions"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Add Comet Lake to the Intel CPU models header
lib/string: Make memzero_explicit() inline instead of external
x86/cpu/vmware: Use the full form of INL in VMWARE_PORT
x86/asm: Fix MWAITX C-state hint value
Linus Torvalds [Sat, 12 Oct 2019 21:37:55 +0000 (14:37 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 license tag fixlets from Ingo Molnar:
"Fix a couple of SPDX tags in x86 headers to follow the canonical
pattern"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Use the correct SPDX License Identifier in headers
Linus Torvalds [Sat, 12 Oct 2019 21:25:38 +0000 (14:25 -0700)]
Merge tag 'riscv/for-v5.4-rc3' of git://git./linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
- Fix several bugs in the breakpoint trap handler
- Drop an unnecessary loop around calls to preempt_schedule_irq()
* tag 'riscv/for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: entry: Remove unneeded need_resched() loop
riscv: Correct the handling of unexpected ebreak in do_trap_break()
riscv: avoid sending a SIGTRAP to a user thread trapped in WARN()
riscv: avoid kernel hangs when trapped in BUG()
Linus Torvalds [Sat, 12 Oct 2019 21:16:51 +0000 (14:16 -0700)]
Merge tag 'mips_fixes_5.4_2' of git://git./linux/kernel/git/mips/linux
Pull MIPS fixes from Paul Burton:
- Build fixes for CONFIG_OPTIMIZE_INLINING=y builds in which the
compiler may choose not to inline __xchg() & __cmpxchg().
- A build fix for Loongson configurations with GCC 9.x.
- Expose some extra HWCAP bits to indicate support for various
instruction set extensions to userland.
- Fix bad stack access in firmware handling code for old SNI
RM200/300/400 machines.
* tag 'mips_fixes_5.4_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: Disable Loongson MMI instructions for kernel build
MIPS: elf_hwcap: Export userspace ASEs
MIPS: fw: sni: Fix out of bounds init of o32 stack
MIPS: include: Mark __xchg as __always_inline
MIPS: include: Mark __cmpxchg as __always_inline
Linus Torvalds [Sat, 12 Oct 2019 21:13:55 +0000 (14:13 -0700)]
Merge tag 'powerpc-5.4-3' of git://git./linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fix a kernel crash in spufs_create_root() on Cell machines, since the
new mount API went in.
Fix a regression in our KVM code caused by our recent PCR changes.
Avoid a warning message about a failing hypervisor API on systems that
don't have that API.
A couple of minor build fixes.
Thanks to: Alexey Kardashevskiy, Alistair Popple, Desnes A. Nunes do
Rosario, Emmanuel Nicolet, Jordan Niethe, Laurent Dufour, Stephen
Rothwell"
* tag 'powerpc-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
spufs: fix a crash in spufs_create_root()
powerpc/kvm: Fix kvmppc_vcore->in_guest value in kvmhv_switch_to_host
selftests/powerpc: Fix compile error on tlbie_test due to newer gcc
powerpc/pseries: Remove confusing warning message.
powerpc/64s/radix: Fix build failure with RADIX_MMU=n
Linus Torvalds [Sat, 12 Oct 2019 21:11:21 +0000 (14:11 -0700)]
Merge tag 'for-linus-5.4-rc3-tag' of git://git./linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- correct panic handling when running as a Xen guest
- cleanup the Xen grant driver to remove printing a pointer being
always NULL
- remove a soon to be wrong call of of_dma_configure()
* tag 'for-linus-5.4-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: Stop abusing DT of_dma_configure API
xen/grant-table: remove unnecessary printing
x86/xen: Return from panic notifier
Linus Torvalds [Sat, 12 Oct 2019 21:09:31 +0000 (14:09 -0700)]
Merge tag 's390-5.4-4' of git://git./linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Fix virtio-ccw DMA regression
- Fix compiler warnings in uaccess
* tag 's390-5.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/uaccess: avoid (false positive) compiler warnings
s390/cio: fix virtio-ccw DMA without PV
Kan Liang [Tue, 8 Oct 2019 15:50:10 +0000 (08:50 -0700)]
perf/x86/cstate: Add Tiger Lake CPU support
Tiger Lake is the followon to Ice Lake. From the perspective of Intel
cstate residency counters, there is nothing changed compared with
Ice Lake.
Share icl_cstates with Ice Lake.
Update the comments for Tiger Lake.
The External Design Specification (EDS) is not published yet. It comes
from an authoritative internal source.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-10-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:09 +0000 (08:50 -0700)]
perf/x86/msr: Add Tiger Lake CPU support
Tiger Lake is the followon to Ice Lake. PPERF and SMI_COUNT MSRs are
also supported.
The External Design Specification (EDS) is not published yet. It comes
from an authoritative internal source.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-9-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:08 +0000 (08:50 -0700)]
perf/x86/intel: Add Tiger Lake CPU support
Tiger Lake is the followon to Ice Lake. From the perspective of Intel
core PMU, there is little changes compared with Ice Lake, e.g. small
changes in event list. But it doesn't impact on core PMU functionality.
Share the perf code with Ice Lake. The event list patch will be submitted
later separately.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-8-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:07 +0000 (08:50 -0700)]
perf/x86/cstate: Update C-state counters for Ice Lake
There is no Core C3 C-State counter for Ice Lake.
Package C8/C9/C10 C-State counters are added for Ice Lake.
Introduce a new event list, icl_cstates, for Ice Lake.
Update the comments accordingly.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes:
f08c47d1f86c ("perf/x86/intel/cstate: Add Icelake support")
Link: https://lkml.kernel.org/r/1570549810-25049-7-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:06 +0000 (08:50 -0700)]
perf/x86/msr: Add new CPU model numbers for Ice Lake
PPERF and SMI_COUNT MSRs are also supported by Ice Lake desktop and
server.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-6-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:05 +0000 (08:50 -0700)]
perf/x86/cstate: Add Comet Lake CPU support
Comet Lake is the new 10th Gen Intel processor. From the perspective of
Intel cstate residency counters, there is nothing changed compared with
Kaby Lake.
Share hswult_cstates with Kaby Lake.
Update the comments for Comet Lake.
Kaby Lake is missed in the comments for some Residency Counters. Update
the comments for Kaby Lake as well.
The External Design Specification (EDS) is not published yet. It comes
from an authoritative internal source.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-5-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:04 +0000 (08:50 -0700)]
perf/x86/msr: Add Comet Lake CPU support
Comet Lake is the new 10th Gen Intel processor. PPERF and SMI_COUNT MSRs
are also supported.
The External Design Specification (EDS) is not published yet. It comes
from an authoritative internal source.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-4-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Tue, 8 Oct 2019 15:50:03 +0000 (08:50 -0700)]
perf/x86/intel: Add Comet Lake CPU support
Comet Lake is the new 10th Gen Intel processor. From the perspective
of Intel PMU, there is nothing changed compared with Sky Lake.
Share the perf code with Sky Lake.
The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-3-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Sat, 12 Oct 2019 13:12:21 +0000 (15:12 +0200)]
Merge branch 'x86/urgent' into perf/urgent, to pick up new CPU model definitions
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Xiaojie Yuan [Wed, 9 Oct 2019 17:01:23 +0000 (01:01 +0800)]
drm/amdgpu/sdma5: fix mask value of POLL_REGMEM packet for pipe sync
sdma will hang once sequence number to be polled reaches 0x1000_0000
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Hans de Goede [Thu, 10 Oct 2019 16:28:17 +0000 (18:28 +0200)]
drm/amdgpu: Bail earlier when amdgpu.cik_/si_support is not set to 1
Bail from the pci_driver probe function instead of from the drm_driver
load function.
This avoid /dev/dri/card0 temporarily getting registered and then
unregistered again, sending unwanted add / remove udev events to
userspace.
Specifically this avoids triggering the (userspace) bug fixed by this
plymouth merge-request:
https://gitlab.freedesktop.org/plymouth/plymouth/merge_requests/59
Note that despite that being a userspace bug, not sending unnecessary
udev events is a good idea in general.
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1490490
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Alex Deucher [Wed, 9 Oct 2019 18:12:37 +0000 (13:12 -0500)]
Revert "drm/radeon: Fix EEH during kexec"
This reverts commit
6f7fe9a93e6c09bf988c5059403f5f88e17e21e6.
This breaks some boards. Maybe just enable this on PPC for
now?
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=205147
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Linus Torvalds [Fri, 11 Oct 2019 21:28:59 +0000 (14:28 -0700)]
Merge tag 'nfs-for-5.4-2' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client bugfixes from Anna Schumaker:
"Stable bugfixes:
- Fix O_DIRECT accounting of number of bytes read/written # v4.1+
Other fixes:
- Fix nfsi->nrequests count error on nfs_inode_remove_request()
- Remove redundant mirror tracking in O_DIRECT
- Fix leak of clp->cl_acceptor string
- Fix race to sk_err after xs_error_report"
* tag 'nfs-for-5.4-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
SUNRPC: fix race to sk_err after xs_error_report
NFSv4: Fix leak of clp->cl_acceptor string
NFS: Remove redundant mirror tracking in O_DIRECT
NFS: Fix O_DIRECT accounting of number of bytes read/written
nfs: Fix nfsi->nrequests count error on nfs_inode_remove_request
Linus Torvalds [Fri, 11 Oct 2019 21:01:13 +0000 (14:01 -0700)]
Merge tag '5.4-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Eight small SMB3 fixes, four for stable, and important fix for the
recent regression introduced by filesystem timestamp range patches"
* tag '5.4-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6:
CIFS: Force reval dentry if LOOKUP_REVAL flag is set
CIFS: Force revalidate inode when dentry is stale
smb3: Fix regression in time handling
smb3: remove noisy debug message and minor cleanup
CIFS: Gracefully handle QueryInfo errors during open
cifs: use cifsInodeInfo->open_file_lock while iterating to avoid a panic
fs: cifs: mute -Wunused-const-variable message
smb3: cleanup some recent endian errors spotted by updated sparse
Jeffrey Hugo [Fri, 11 Oct 2019 13:39:39 +0000 (06:39 -0700)]
drm/msm/dsi: Implement reset correctly
On msm8998, vblank timeouts are observed because the DSI controller is not
reset properly, which ends up stalling the MDP. This is because the reset
logic is not correct per the hardware documentation.
The documentation states that after asserting reset, software should wait
some time (no indication of how long), or poll the status register until it
returns 0 before deasserting reset.
wmb() is insufficient for this purpose since it just ensures ordering, not
timing between writes. Since asserting and deasserting reset occurs on the
same register, ordering is already guaranteed by the architecture, making
the wmb extraneous.
Since we would define a timeout for polling the status register to avoid a
possible infinite loop, lets just use a static delay of 20 ms, since 16.666
ms is the time available to process one frame at 60 fps.
Fixes:
a689554ba6ed ("drm/msm: Initial add DSI connector support")
Cc: Hai Li <hali@codeaurora.org>
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Sean Paul <sean@poorly.run>
[seanpaul renamed RESET_DELAY to DSI_RESET_TOGGLE_DELAY_MS]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191011133939.16551-1-jeffrey.l.hugo@gmail.com
Linus Torvalds [Fri, 11 Oct 2019 17:19:24 +0000 (10:19 -0700)]
Merge tag 'modules-for-v5.4-rc3' of git://git./linux/kernel/git/jeyu/linux
Pull module fixes from Jessica Yu:
"Code cleanups and kbuild/namespace related fixups from Masahiro.
Most importantly, it fixes a namespace-related modpost issue for
external module builds
- Fix broken external module builds due to a modpost bug in
read_dump(), where the namespace was not being strdup'd and
sym->namespace would be set to bogus data.
- Various namespace-related kbuild fixes and cleanups thanks to
Masahiro Yamada"
* tag 'modules-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
doc: move namespaces.rst from kbuild/ to core-api/
nsdeps: make generated patches independent of locale
nsdeps: fix hashbang of scripts/nsdeps
kbuild: fix build error of 'make nsdeps' in clean tree
module: rename __kstrtab_ns_* to __kstrtabns_* to avoid symbol conflict
modpost: fix broken sym->namespace for external module builds
module: swap the order of symbol.namespace
scripts: add_namespace: Fix coccicheck failed
Linus Torvalds [Fri, 11 Oct 2019 17:12:45 +0000 (10:12 -0700)]
Merge tag 'hyperv-fixes-signed' of git://git./linux/kernel/git/hyperv/linux
Pull Hyper-V fixes from Sasha Levin:
"Two fixes from Dexuan Cui:
- Fix a (harmless) warning when building vmbus without
CONFIG_PM_SLEEP
- Fix for a memory leak (and optimization) in the hyperv mouse code"
* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
Drivers: hv: vmbus: Fix harmless building warnings without CONFIG_PM_SLEEP
HID: hyperv: Use in-place iterator API in the channel callback
Joe Perches [Sat, 5 Oct 2019 16:46:43 +0000 (09:46 -0700)]
Documentation/process: Add fallthrough pseudo-keyword
Describe the fallthrough pseudo-keyword.
Convert the coding-style.rst example to the keyword style.
Add description and links to deprecated.rst.
Miguel Ojeda comments on the eventual [[fallthrough]] syntax:
"Note that C17/C18 does not have [[fallthrough]].
C++17 introduced it, as it is mentioned above. I would keep the
__attribute__((fallthrough)) -> [[fallthrough]] change you did,
though, since that is indeed the standard syntax (given the paragraph
references C++17).
I was told by Aaron Ballman (who is proposing them for C) that it is
more or less likely that it becomes standardized in C2x. However, it
is still not added to the draft (other attributes are already,
though). See N2268 and N2269:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2268.pdf (fallthrough)
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2269.pdf (attributes in general)"
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joe Perches [Sat, 5 Oct 2019 16:46:42 +0000 (09:46 -0700)]
compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use
Reserve the pseudo keyword 'fallthrough' for the ability to convert the
various case block /* fallthrough */ style comments to appear to be an
actual reserved word with the same gcc case block missing fallthrough
warning capability.
All switch/case blocks now should end in one of:
break;
fallthrough;
goto <label>;
return [expression];
continue;
In C mode, GCC supports the __fallthrough__ attribute since 7.1,
the same time the warning and the comment parsing were introduced.
fallthrough devolves to an empty "do {} while (0)" if the compiler
version (any version less than gcc 7) does not support the attribute.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joe Perches [Sat, 5 Oct 2019 16:46:41 +0000 (09:46 -0700)]
net: sctp: Rename fallthrough label to unhandled
fallthrough will become a pseudo reserved keyword so this only use of
fallthrough is better renamed to allow it.
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 11 Oct 2019 16:02:33 +0000 (09:02 -0700)]
Merge tag 'drm-fixes-2019-10-11' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"The regular fixes pull for rc3. The i915 team found some fixes they
(or I) missed for rc1, which is why this is a bit bigger than usual,
otherwise there is a single amdgpu fix, some spi panel aliases, and a
bridge fix.
i915:
- execlist access fixes
- list deletion fix
- CML display fix
- HSW workaround extension to GT2
- chicken bit whitelist
- GGTT resume issue
- SKL GPU hangs for Vulkan compute
amdgpu:
- memory leak fix
panel:
- spi aliases
tc358767:
- bridge artifacts fix"
* tag 'drm-fixes-2019-10-11' of git://anongit.freedesktop.org/drm/drm: (22 commits)
drm/bridge: tc358767: fix max_tu_symbol value
drm/i915/gt: execlists->active is serialised by the tasklet
drm/i915/execlists: Protect peeking at execlists->active
drm/i915: Fixup preempt-to-busy vs reset of a virtual request
drm/i915: Only enqueue already completed requests
drm/i915/execlists: Drop redundant list_del_init(&rq->sched.link)
drm/i915/cml: Add second PCH ID for CMP
drm/amdgpu: fix memory leak
drm/panel: tpo-td043mtea1: Fix SPI alias
drm/panel: tpo-td028ttec1: Fix SPI alias
drm/panel: sony-acx565akm: Fix SPI alias
drm/panel: nec-nl8048hl11: Fix SPI alias
drm/panel: lg-lb035q02: Fix SPI alias
drm/i915: Mark contents as dirty on a write fault
drm/i915: Prevent bonded requests from overtaking each other on preemption
drm/i915: Bump skl+ max plane width to 5k for linear/x-tiled
drm/i915: Verify the engine after acquiring the active.lock
drm/i915: Extend Haswell GT1 PSMI workaround to all
drm/i915: Don't mix srcu tag and negative error codes
drm/i915: Whitelist COMMON_SLICE_CHICKEN2
...
Linus Torvalds [Fri, 11 Oct 2019 15:45:32 +0000 (08:45 -0700)]
Merge tag 'for-linus-
20191010' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- Fix wbt performance regression introduced with the blk-rq-qos
refactoring (Harshad)
- Fix io_uring fileset removal inadvertently killing the workqueue (me)
- Fix io_uring typo in linked command nonblock submission (Pavel)
- Remove spurious io_uring wakeups on request free (Pavel)
- Fix null_blk zoned command error return (Keith)
- Don't use freezable workqueues for backing_dev, also means we can
revert a previous libata hack (Mika)
- Fix nbd sysfs mutex dropped too soon at removal time (Xiubo)
* tag 'for-linus-
20191010' of git://git.kernel.dk/linux-block:
nbd: fix possible sysfs duplicate warning
null_blk: Fix zoned command return code
io_uring: only flush workqueues on fileset removal
io_uring: remove wait loop spurious wakeups
blk-wbt: fix performance regression in wbt scale_up/scale_down
Revert "libata, freezer: avoid block device removal while system is frozen"
bdi: Do not use freezable workqueue
io_uring: fix reversed nonblock flag for link submission
Christian Borntraeger [Tue, 8 Oct 2019 15:02:32 +0000 (17:02 +0200)]
s390/uaccess: avoid (false positive) compiler warnings
Depending on inlining decisions by the compiler, __get/put_user_fn
might become out of line. Then the compiler is no longer able to tell
that size can only be 1,2,4 or 8 due to the check in __get/put_user
resulting in false positives like
./arch/s390/include/asm/uaccess.h: In function ‘__put_user_fn’:
./arch/s390/include/asm/uaccess.h:113:9: warning: ‘rc’ may be used uninitialized in this function [-Wmaybe-uninitialized]
113 | return rc;
| ^~
./arch/s390/include/asm/uaccess.h: In function ‘__get_user_fn’:
./arch/s390/include/asm/uaccess.h:143:9: warning: ‘rc’ may be used uninitialized in this function [-Wmaybe-uninitialized]
143 | return rc;
| ^~
These functions are supposed to be always inlined. Mark it as such.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Brian Norris [Mon, 30 Sep 2019 21:45:22 +0000 (14:45 -0700)]
firmware: google: increment VPD key_len properly
Commit
4b708b7b1a2c ("firmware: google: check if size is valid when
decoding VPD data") adds length checks, but the new vpd_decode_entry()
function botched the logic -- it adds the key length twice, instead of
adding the key and value lengths separately.
On my local system, this means vpd.c's vpd_section_create_attribs() hits
an error case after the first attribute it parses, since it's no longer
looking at the correct offset. With this patch, I'm back to seeing all
the correct attributes in /sys/firmware/vpd/...
Fixes:
4b708b7b1a2c ("firmware: google: check if size is valid when decoding VPD data")
Cc: <stable@vger.kernel.org>
Cc: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Link: https://lore.kernel.org/r/20190930214522.240680-1-briannorris@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Douglas Anderson [Fri, 20 Sep 2019 17:44:47 +0000 (10:44 -0700)]
MAINTAINERS: kgdb: Add myself as a reviewer for kgdb/kdb
I'm interested in kdb / kgdb and have sent various fixes over the
years. I'd like to get CCed on patches so I can be aware of them and
also help review.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20190920104404.1.I237e68e8825e2d6ac26f8e847f521fe2fcc3705a@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Emmanuel Nicolet [Tue, 8 Oct 2019 14:13:42 +0000 (16:13 +0200)]
spufs: fix a crash in spufs_create_root()
The spu_fs_context was not set in fc->fs_private, this caused a crash
when accessing ctx->mode in spufs_create_root().
Fixes:
d2e0981c3b9a ("vfs: Convert spufs to use the new mount API")
Signed-off-by: Emmanuel Nicolet <emmanuel.nicolet@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191008141342.GA266797@gmail.com
Jens Axboe [Fri, 11 Oct 2019 03:42:58 +0000 (21:42 -0600)]
io_uring: fix sequence logic for timeout requests
We have two ways a request can be deferred:
1) It's a regular request that depends on another one
2) It's a timeout that tracks completions
We have a shared helper to determine whether to defer, and that
attempts to make the right decision based on the request. But we
only have some of this information in the caller. Un-share the
two timeout/defer helpers so the caller can use the right one.
Fixes:
5262f567987d ("io_uring: IORING_OP_TIMEOUT support")
Reported-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Dave Airlie [Fri, 11 Oct 2019 00:09:01 +0000 (10:09 +1000)]
Merge tag 'drm-intel-fixes-2019-10-10' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Fix CML display by adding a missing ID.
- Drop redundant list_del_init
- Only enqueue already completed requests to avoid races
- Fixup preempt-to-busy vs reset of a virtual request
- Protect peeking at execlists->active
- execlists->active is serialised by the tasklet
drm-intel-next-fixes-2019-09-19:
- Extend old HSW workaround to fix some GPU hangs on Haswell GT2
- Fix return error code on GEM mmap.
- White list a chicken bit register for push constants legacy mode on Mesa
- Fix resume issue related to GGTT restore
- Remove incorrect BUG_ON on execlist's schedule-out
- Fix unrecoverable GPU hangs with Vulkan compute workloads on SKL
drm-intel-next-fixes-2019-09-26:
- Fix concurrence on cases where requests where getting retired at same time as resubmitted to HW
- Fix gen9 display resolutions by setting the right max plane width
- Fix GPU hang on preemption
- Mark contents as dirty on a write fault. This was breaking cursor sprite with dumb buffers.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010143039.GA15313@intel.com
Dave Airlie [Fri, 11 Oct 2019 00:08:32 +0000 (10:08 +1000)]
Merge tag 'drm-fixes-5.4-2019-10-09' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
drm-fixes-5.4-2019-10-09:
amdgpu:
- fix memory leak in bo_list ioctl error path
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010031023.23359-1-alexander.deucher@amd.com
Dave Airlie [Fri, 11 Oct 2019 00:08:02 +0000 (10:08 +1000)]
Merge tag 'drm-misc-fixes-2019-10-10' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Short summary of fixes pull (less than what git shortlog provides):
- SPI Aliases fixes for panels
- One fix for the tc358767 bridge dealing with visual artifacts
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010105137.j6juxht5dsobgxph@gilmour
Benjamin Coddington [Wed, 2 Oct 2019 14:40:55 +0000 (10:40 -0400)]
SUNRPC: fix race to sk_err after xs_error_report
Since commit
4f8943f80883 ("SUNRPC: Replace direct task wakeups from
softirq context") there has been a race to the value of the sk_err if both
XPRT_SOCK_WAKE_ERROR and XPRT_SOCK_WAKE_DISCONNECT are set. In that case,
we may end up losing the sk_err value that existed when xs_error_report was
called.
Fix this by reverting to the previous behavior: instead of using SO_ERROR
to retrieve the value at a later time (which might also return sk_err_soft),
copy the sk_err value onto struct sock_xprt, and use that value to wake
pending tasks.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes:
4f8943f80883 ("SUNRPC: Replace direct task wakeups from softirq context")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Fri, 4 Oct 2019 13:58:54 +0000 (09:58 -0400)]
NFSv4: Fix leak of clp->cl_acceptor string
Our client can issue multiple SETCLIENTID operations to the same
server in some circumstances. Ensure that calls to
nfs4_proc_setclientid() after the first one do not overwrite the
previously allocated cl_acceptor string.
unreferenced object 0xffff888461031800 (size 32):
comm "mount.nfs", pid 2227, jiffies
4294822467 (age 1407.749s)
hex dump (first 32 bytes):
6e 66 73 40 6b 6c 69 6d 74 2e 69 62 2e 31 30 31 nfs@klimt.ib.101
35 67 72 61 6e 67 65 72 2e 6e 65 74 00 00 00 00 5granger.net....
backtrace:
[<
00000000ab820188>] __kmalloc+0x128/0x176
[<
00000000eeaf4ec8>] gss_stringify_acceptor+0xbd/0x1a7 [auth_rpcgss]
[<
00000000e85e3382>] nfs4_proc_setclientid+0x34e/0x46c [nfsv4]
[<
000000003d9cf1fa>] nfs40_discover_server_trunking+0x7a/0xed [nfsv4]
[<
00000000b81c3787>] nfs4_discover_server_trunking+0x81/0x244 [nfsv4]
[<
000000000801b55f>] nfs4_init_client+0x1b0/0x238 [nfsv4]
[<
00000000977daf7f>] nfs4_set_client+0xfe/0x14d [nfsv4]
[<
0000000053a68a2a>] nfs4_create_server+0x107/0x1db [nfsv4]
[<
0000000088262019>] nfs4_remote_mount+0x2c/0x59 [nfsv4]
[<
00000000e84a2fd0>] legacy_get_tree+0x2d/0x4c
[<
00000000797e947c>] vfs_get_tree+0x20/0xc7
[<
00000000ecabaaa8>] fc_mount+0xe/0x36
[<
00000000f15fafc2>] vfs_kern_mount+0x74/0x8d
[<
00000000a3ff4e26>] nfs_do_root_mount+0x8a/0xa3 [nfsv4]
[<
00000000d1c2b337>] nfs4_try_mount+0x58/0xad [nfsv4]
[<
000000004c9bddee>] nfs_fs_mount+0x820/0x869 [nfs]
Fixes:
f11b2a1cfbf5 ("nfs4: copy acceptor name from context ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Paul Burton [Thu, 10 Oct 2019 18:54:03 +0000 (18:54 +0000)]
MIPS: Disable Loongson MMI instructions for kernel build
GCC 9.x automatically enables support for Loongson MMI instructions when
using some -march= flags, and then errors out when -msoft-float is
specified with:
cc1: error: ‘-mloongson-mmi’ must be used with ‘-mhard-float’
The kernel shouldn't be using these MMI instructions anyway, just as it
doesn't use floating point instructions. Explicitly disable them in
order to fix the build with GCC 9.x.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes:
3702bba5eb4f ("MIPS: Loongson: Add GCC 4.4 support for Loongson2E")
Fixes:
6f7a251a259e ("MIPS: Loongson: Add basic Loongson 2F support")
Fixes:
5188129b8c9f ("MIPS: Loongson-3: Improve -march option and move it to Platform")
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: stable@vger.kernel.org # v2.6.32+
Cc: linux-mips@vger.kernel.org
Jiaxun Yang [Thu, 10 Oct 2019 15:01:57 +0000 (23:01 +0800)]
MIPS: elf_hwcap: Export userspace ASEs
A Golang developer reported MIPS hwcap isn't reflecting instructions
that the processor actually supported so programs can't apply optimized
code at runtime.
Thus we export the ASEs that can be used in userspace programs.
Reported-by: Meng Zhuo <mengzhuo1203@gmail.com>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-mips@vger.kernel.org
Cc: Paul Burton <paul.burton@mips.com>
Cc: <stable@vger.kernel.org> # 4.14+
Signed-off-by: Paul Burton <paul.burton@mips.com>
Linus Torvalds [Thu, 10 Oct 2019 18:47:16 +0000 (11:47 -0700)]
Merge tag 'xfs-5.4-fixes-3' of git://git./fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"A couple of small code cleanups and bug fixes for rounding errors,
metadata logging errors, and an extra layer of safeguards against
leaking memory contents.
- Fix a rounding error in the fallocate code
- Minor code cleanups
- Make sure to zero memory buffers before formatting metadata blocks
- Fix a few places where we forgot to log an inode metadata update
- Remove broken error handling that tried to clean up after a failure
but still got it wrong"
* tag 'xfs-5.4-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: move local to extent inode logging into bmap helper
xfs: remove broken error handling on failed attr sf to leaf change
xfs: log the inode on directory sf to block format change
xfs: assure zeroed memory buffers for certain kmem allocations
xfs: removed unused error variable from xchk_refcountbt_rec
xfs: remove unused flags arg from xfs_get_aghdr_buf()
xfs: Fix tail rounding in xfs_alloc_file_space()
Xiubo Li [Thu, 19 Sep 2019 06:14:27 +0000 (11:44 +0530)]
nbd: fix possible sysfs duplicate warning
1. nbd_put takes the mutex and drops nbd->ref to 0. It then does
idr_remove and drops the mutex.
2. nbd_genl_connect takes the mutex. idr_find/idr_for_each fails
to find an existing device, so it does nbd_dev_add.
3. just before the nbd_put could call nbd_dev_remove or not finished
totally, but if nbd_dev_add try to add_disk, we can hit:
debugfs: Directory 'nbd1' with parent 'block' already present!
This patch will make sure all the disk add/remove stuff are done
by holding the nbd_index_mutex lock.
Reported-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Rob Herring [Tue, 8 Oct 2019 19:41:55 +0000 (14:41 -0500)]
xen: Stop abusing DT of_dma_configure API
As the removed comments say, these aren't DT based devices.
of_dma_configure() is going to stop allowing a NULL DT node and calling
it will no longer work.
The comment is also now out of date as of commit
9ab91e7c5c51 ("arm64:
default to the direct mapping in get_arch_dma_ops"). Direct mapping
is now the default rather than dma_dummy_ops.
According to Stefano and Oleksandr, the only other part needed is
setting the DMA masks and there's no reason to restrict the masks to
32-bits. So set the masks to 64 bits.
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Julien Grall <julien.grall@arm.com>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: xen-devel@lists.xenproject.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Linus Torvalds [Thu, 10 Oct 2019 15:39:00 +0000 (08:39 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"Fix build issues in arm/aes-ce"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: arm/aes-ce - add dependency on AES library
crypto: arm/aes-ce - build for v8 architecture explicitly
Linus Torvalds [Thu, 10 Oct 2019 15:30:51 +0000 (08:30 -0700)]
Merge tag 'for-5.4-rc2-tag' of git://git./linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few more stabitly fixes, one build warning fix.
- fix inode allocation under NOFS context
- fix leak in fiemap due to concurrent append writes
- fix log-root tree updates
- fix balance convert of single profile on 32bit architectures
- silence false positive warning on old GCCs (code moved in rc1)"
* tag 'for-5.4-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: silence maybe-uninitialized warning in clone_range
btrfs: fix uninitialized ret in ref-verify
btrfs: allocate new inode in NOFS context
btrfs: fix balance convert to single on 32-bit host CPUs
btrfs: fix incorrect updating of log root tree
Btrfs: fix memory leak due to concurrent append writes with fiemap
Linus Torvalds [Thu, 10 Oct 2019 15:26:58 +0000 (08:26 -0700)]
Merge branch 'work.dcache' of git://git./linux/kernel/git/viro/vfs
Pull dcache_readdir() fixes from Al Viro:
"The couple of patches you'd been OK with; no hlist conversion yet, and
cursors are still in the list of children"
[ Al is referring to future work to avoid some nasty O(n**2) behavior
with the readdir cursors when you have lots of concurrent readdirs.
This is just a fix for a race with a trivial cleanup - Linus ]
* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
libfs: take cursors out of list when moving past the end of directory
Fix the locking in dcache_readdir() and friends
Linus Torvalds [Thu, 10 Oct 2019 15:16:44 +0000 (08:16 -0700)]
Merge branch 'work.mount3' of git://git./linux/kernel/git/viro/vfs
Pull mount fixes from Al Viro:
"A couple of regressions from the mount series"
* 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
vfs: add missing blkdev_put() in get_tree_bdev()
shmem: fix LSM options parsing
Geert Uytterhoeven [Thu, 10 Oct 2019 12:30:46 +0000 (14:30 +0200)]
MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer
At the end of the v5.3 upstream kernel development cycle, Simon stepped
down from his role as Renesas SoC maintainer.
Remove his maintainership, git repository, and branch from the
MAINTAINERS file, and add an entry to the CREDITS file to honor his
work.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Qiang Yu [Sun, 22 Sep 2019 07:49:00 +0000 (15:49 +0800)]
dma-buf/resv: fix exclusive fence get
This causes kernel crash when testing lima driver.
Cc: Christian König <christian.koenig@amd.com>
Fixes:
b8c036dfc66f ("dma-buf: simplify reservation_object_get_fences_rcu a bit")
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190922074900.853-1-yuq825@gmail.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Fuqian Huang [Thu, 10 Oct 2019 08:32:09 +0000 (16:32 +0800)]
xen/grant-table: remove unnecessary printing
xen_auto_xlat_grant_frames.vaddr is definitely NULL in this case.
So the address printing is unnecessary.
Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Kai-Heng Feng [Tue, 2 Apr 2019 03:30:37 +0000 (11:30 +0800)]
drm/edid: Add 6 bpc quirk for SDC panel in Lenovo G50
Another panel that needs 6BPC quirk.
BugLink: https://bugs.launchpad.net/bugs/1819968
Cc: <stable@vger.kernel.org> # v4.8+
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190402033037.21877-1-kai.heng.feng@canonical.com
YueHaibing [Fri, 20 Sep 2019 06:03:18 +0000 (14:03 +0800)]
w1: ds250x: Fix build error without CRC16
If CRC16 is not set, building will fails:
drivers/w1/slaves/w1_ds250x.o: In function `w1_ds2505_read_page':
w1_ds250x.c:(.text+0x82f): undefined reference to `crc16'
w1_ds250x.c:(.text+0x90a): undefined reference to `crc16'
w1_ds250x.c:(.text+0x91a): undefined reference to `crc16'
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes:
25ec8710d9c2 ("w1: add DS2501, DS2502, DS2505 EPROM device driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190920060318.35020-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ulf Magnusson [Fri, 27 Sep 2019 17:42:32 +0000 (19:42 +0200)]
drm/tiny: Kconfig: Remove always-y THERMAL dep. from TINYDRM_REPAPER
[cherry-picked to drm-misc-fixes: drm-misc-next commit
dfef959803c7]
Commit
554b3529fe01 ("thermal/drivers/core: Remove the module Kconfig's
option") changed the type of THERMAL from tristate to bool, so
THERMAL || !THERMAL is now always y. Remove the redundant dependency.
Discovered through Kconfiglib detecting a dependency loop. The C tools
simplify the expression to y before running dependency loop detection,
and so don't see it. Changing the type of THERMAL back to tristate makes
the C tools detect the same loop.
Not sure if running dep. loop detection after simplification can be
called a bug. Fixing this nit unbreaks Kconfiglib on the kernel at
least.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190927174218.GA32085@huvuddator
Navid Emamdoost [Mon, 30 Sep 2019 20:42:22 +0000 (15:42 -0500)]
virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr
In hgcm_call_preprocess_linaddr memory is allocated for bounce_buf but
is not released if copy_form_user fails. In order to prevent memory leak
in case of failure, the assignment to bounce_buf_ret is moved before the
error check. This way the allocated bounce_buf will be released by the
caller.
Fixes:
579db9d45cb4 ("virt: Add vboxguest VMMDEV communication code")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20190930204223.3660-1-navid.emamdoost@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joel Fernandes (Google) [Mon, 30 Sep 2019 20:12:50 +0000 (16:12 -0400)]
binder: Fix comment headers on binder_alloc_prepare_to_free()
binder_alloc_buffer_lookup() doesn't exist and is named
"binder_alloc_prepare_to_free()". Correct the code comments to reflect
this.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20190930201250.139554-1-joel@joelfernandes.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christian Brauner [Tue, 8 Oct 2019 13:01:59 +0000 (15:01 +0200)]
binder: prevent UAF read in print_binder_transaction_log_entry()
When a binder transaction is initiated on a binder device coming from a
binderfs instance, a pointer to the name of the binder device is stashed
in the binder_transaction_log_entry's context_name member. Later on it
is used to print the name in print_binder_transaction_log_entry(). By
the time print_binder_transaction_log_entry() accesses context_name
binderfs_evict_inode() might have already freed the associated memory
thereby causing a UAF. Do the simple thing and prevent this by copying
the name of the binder device instead of stashing a pointer to it.
Reported-by: Jann Horn <jannh@google.com>
Fixes:
03e2e07e3814 ("binder: Make transaction_log available in binderfs")
Link: https://lore.kernel.org/r/CAG48ez14Q0-F8LqsvcNbyR2o6gPW8SHXsm4u5jmD9MpsteM2Tw@mail.gmail.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Acked-by: Todd Kjos <tkjos@google.com>
Reviewed-by: Hridya Valsaraju <hridya@google.com>
Link: https://lore.kernel.org/r/20191008130159.10161-1-christian.brauner@ubuntu.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Wed, 9 Oct 2019 15:38:48 +0000 (17:38 +0200)]
USB: yurex: fix NULL-derefs on disconnect
The driver was using its struct usb_interface pointer as an inverted
disconnected flag, but was setting it to NULL without making sure all
code paths that used it were done with it.
Before commit
ef61eb43ada6 ("USB: yurex: Fix protection fault after
device removal") this included the interrupt-in completion handler, but
there are further accesses in dev_err and dev_dbg statements in
yurex_write() and the driver-data destructor (sic!).
Fix this by unconditionally stopping also the control URB at disconnect
and by using a dedicated disconnected flag.
Note that we need to take a reference to the struct usb_interface to
avoid a use-after-free in the destructor whenever the device was
disconnected while the character device was still open.
Fixes:
aadd6472d904 ("USB: yurex.c: remove dbg() usage")
Fixes:
45714104b9e8 ("USB: yurex.c: remove err() usage")
Cc: stable <stable@vger.kernel.org> # 3.5: ef61eb43ada6
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009153848.8664-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anson Huang [Wed, 9 Oct 2019 09:49:19 +0000 (17:49 +0800)]
tty: serial: imx: Use platform_get_irq_optional() for optional IRQs
All i.MX SoCs except i.MX1 have ONLY one necessary IRQ, use
platform_get_irq_optional() to get second/third IRQ which are
optional to avoid below error message during probe:
[ 0.726219] imx-uart
30860000.serial: IRQ index 1 not found
[ 0.731329] imx-uart
30860000.serial: IRQ index 2 not found
Fixes:
7723f4c5ecdb8d83 ("driver core: platform: Add an error message to platform_get_irq*()")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1570614559-11900-1-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Randy Dunlap [Tue, 8 Oct 2019 20:46:53 +0000 (13:46 -0700)]
serial: fix kernel-doc warning in comments
Fix Sphinx warning in serial_core.c:
../drivers/tty/serial/serial_core.c:1969: WARNING: Definition list ends without a blank line; unexpected unindent.
Fixes:
73abaf87f01b ("serial: earlycon: Refactor parse_options into serial core")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/e989641c-224a-1090-e596-e7cc800bed44@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Wed, 9 Oct 2019 10:48:46 +0000 (12:48 +0200)]
USB: iowarrior: use pr_err()
Replace the one remaining printk with pr_err().
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-7-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Wed, 9 Oct 2019 10:48:45 +0000 (12:48 +0200)]
USB: iowarrior: drop redundant iowarrior mutex
Drop the redundant iowarrior mutex introduced by commit
925ce689bb31
("USB: autoconvert trivial BKL users to private mutex") which replaced
an earlier BKL use.
The lock serialised calls to open() against other open() and ioctl(),
but neither is needed.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Wed, 9 Oct 2019 10:48:44 +0000 (12:48 +0200)]
USB: iowarrior: drop redundant disconnect mutex
Drop the redundant disconnect mutex which was introduced after the
open-disconnect race had been addressed generally in USB core by commit
d4ead16f50f9 ("USB: prevent char device open/deregister race").
Specifically, the rw-semaphore in core guarantees that all calls to
open() will have completed and that no new calls to open() will occur
after usb_deregister_dev() returns. Hence there is no need use the
driver data as an inverted disconnected flag.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>