platform/kernel/linux-rpi.git
3 years agof2fs: add sysfs nodes to get runtime compression stat
Daeho Jeong [Mon, 15 Mar 2021 08:12:33 +0000 (17:12 +0900)]
f2fs: add sysfs nodes to get runtime compression stat

I've added new sysfs nodes to show runtime compression stat since mount.
compr_written_block - show the block count written after compression
compr_saved_block - show the saved block count with compression
compr_new_inode - show the count of inode newly enabled for compression

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix to use per-inode maxbytes in f2fs_fiemap
Chengguang Xu [Tue, 9 Mar 2021 05:21:18 +0000 (13:21 +0800)]
f2fs: fix to use per-inode maxbytes in f2fs_fiemap

F2FS inode may have different max size,
so change to use per-inode maxbytes.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix to align to section for fallocate() on pinned file
Chao Yu [Fri, 5 Mar 2021 09:56:01 +0000 (17:56 +0800)]
f2fs: fix to align to section for fallocate() on pinned file

Now, fallocate() on a pinned file only allocates blocks which aligns
to segment rather than section, so GC may try to migrate pinned file's
block, and after several times of failure, pinned file's block could
be migrated to other place, however user won't be aware of such
condition, and then old obsolete block address may be readed/written
incorrectly.

To avoid such condition, let's try to allocate pinned file's blocks
with section alignment.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: expose # of overprivision segments
Jaegeuk Kim [Tue, 2 Mar 2021 01:28:16 +0000 (17:28 -0800)]
f2fs: expose # of overprivision segments

This is useful when checking conditions during checkpoint=disable in Android.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix error handling in f2fs_end_enable_verity()
Eric Biggers [Fri, 5 Mar 2021 05:43:10 +0000 (21:43 -0800)]
f2fs: fix error handling in f2fs_end_enable_verity()

f2fs didn't properly clean up if verity failed to be enabled on a file:

- It left verity metadata (pages past EOF) in the page cache, which
  would be exposed to userspace if the file was later extended.

- It didn't truncate the verity metadata at all (either from cache or
  from disk) if an error occurred while setting the verity bit.

Fix these bugs by adding a call to truncate_inode_pages() and ensuring
that we truncate the verity metadata (both from cache and from disk) in
all error paths.  Also rework the code to cleanly separate the success
path from the error paths, which makes it much easier to understand.

Finally, log a message if f2fs_truncate() fails, since it might
otherwise fail silently.

Reported-by: Yunlei He <heyunlei@hihonor.com>
Fixes: 95ae251fe828 ("f2fs: add fs-verity support")
Cc: <stable@vger.kernel.org> # v5.4+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix a redundant call to f2fs_balance_fs if an error occurs
Colin Ian King [Thu, 4 Mar 2021 09:21:18 +0000 (09:21 +0000)]
f2fs: fix a redundant call to f2fs_balance_fs if an error occurs

The  uninitialized variable dn.node_changed does not get set when a
call to f2fs_get_node_page fails.  This uninitialized value gets used
in the call to f2fs_balance_fs() that may or not may not balances
dirty node and dentry pages depending on the uninitialized state of
the variable. Fix this by only calling f2fs_balance_fs if err is
not set.

Thanks to Jaegeuk Kim for suggesting an appropriate fix.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 2a3407607028 ("f2fs: call f2fs_balance_fs only when node was changed")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: remove unused file_clear_encrypt()
Chao Yu [Tue, 2 Mar 2021 08:35:32 +0000 (16:35 +0800)]
f2fs: remove unused file_clear_encrypt()

- file_clear_encrypt() was never be used, remove it.
- In addition, relocating macros for cleanup.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: check if swapfile is section-alligned
huangjianan@oppo.com [Mon, 1 Mar 2021 04:58:44 +0000 (12:58 +0800)]
f2fs: check if swapfile is section-alligned

If the swapfile isn't created by pin and fallocate, it can't be
guaranteed section-aligned, so it may be selected by f2fs gc. When
gc_pin_file_threshold is reached, the address of swapfile may change,
but won't be synchronized to swap_extent, so swap will write to wrong
address, which will cause data corruption.

Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix last_lblock check in check_swap_activate_fast
huangjianan@oppo.com [Sat, 27 Feb 2021 12:02:30 +0000 (20:02 +0800)]
f2fs: fix last_lblock check in check_swap_activate_fast

Because page_no < sis->max guarantees that the while loop break out
normally, the wrong check contidion here doesn't cause a problem.

Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: remove unnecessary IS_SWAPFILE check
huangjianan@oppo.com [Sat, 27 Feb 2021 12:02:29 +0000 (20:02 +0800)]
f2fs: remove unnecessary IS_SWAPFILE check

Now swapfile in f2fs directly submit IO to blockdev according to
swapfile extents reported by f2fs when swapon, therefore there is
no need to check IS_SWAPFILE when exec filesystem operation.

Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: Replace one-element array with flexible-array member
Gustavo A. R. Silva [Wed, 24 Feb 2021 19:03:13 +0000 (13:03 -0600)]
f2fs: Replace one-element array with flexible-array member

There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use “flexible array members”[1] for these cases. The older
style of one-element or zero-length arrays should no longer be used[2].

Refactor the code according to the use of a flexible-array member in
struct f2fs_checkpoint, instead of a one-element arrays.

Notice that a temporary pointer to void '*tmp_ptr' was used in order to
fix the following errors when using a flexible array instead of a one
element array in struct f2fs_checkpoint:

  CC [M]  fs/f2fs/dir.o
In file included from fs/f2fs/dir.c:13:
fs/f2fs/f2fs.h: In function ‘__bitmap_ptr’:
fs/f2fs/f2fs.h:2227:40: error: invalid use of flexible array member
 2227 |   return &ckpt->sit_nat_version_bitmap + offset + sizeof(__le32);
      |                                        ^
fs/f2fs/f2fs.h:2227:49: error: invalid use of flexible array member
 2227 |   return &ckpt->sit_nat_version_bitmap + offset + sizeof(__le32);
      |                                                 ^
fs/f2fs/f2fs.h:2238:40: error: invalid use of flexible array member
 2238 |   return &ckpt->sit_nat_version_bitmap + offset;
      |                                        ^
make[2]: *** [scripts/Makefile.build:287: fs/f2fs/dir.o] Error 1
make[1]: *** [scripts/Makefile.build:530: fs/f2fs] Error 2
make: *** [Makefile:1819: fs] Error 2

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/79
Build-tested-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/603647e4.DeEFbl4eqljuwAUe%25lkp@intel.com/
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: compress: Allow modular (de)compression algorithms
Geert Uytterhoeven [Fri, 26 Feb 2021 15:51:42 +0000 (16:51 +0100)]
f2fs: compress: Allow modular (de)compression algorithms

If F2FS_FS is modular, enabling the compressions options
F2FS_FS_{LZ4,LZ4HZ,LZO,LZORLE,ZSTD} will make the (de)compression
algorithms {LZ4,LZ4HC,LZO,ZSTD}_{,DE}COMPRESS builtin instead of
modular, as the former depend on an intermediate boolean
F2FS_FS_COMPRESSION, which in-turn depends on tristate F2FS_FS.

Indeed, if a boolean symbol A depends directly on a tristate symbol B
and selects another tristate symbol C:

    tristate B

    tristate C

    bool A
      depends on B
      select C

and B is modular, then C will also be modular.

However, if there is an intermediate boolean D in the dependency chain
between A and B:

    tristate B

    tristate C

    bool D
      depends on B

    bool A
      depends on D
      select C

then the modular state won't propagate from B to C, and C will be
builtin instead of modular.

As modular dependency propagation through intermediate symbols is
obscure, fix this in a robust way by moving the selection of tristate
(de)compression algorithms from the boolean compression options to the
tristate main F2FS_FS option.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: check discard command number before traversing discard pending list
Chao Yu [Mon, 22 Feb 2021 10:07:33 +0000 (18:07 +0800)]
f2fs: check discard command number before traversing discard pending list

In trim thread, let's add a condition to check discard command number
before traversing discard pending list, it can avoid unneeded traversing
if there is no discard command.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: update comments for explicit memory barrier
Chao Yu [Sat, 20 Feb 2021 09:38:43 +0000 (17:38 +0800)]
f2fs: update comments for explicit memory barrier

Add more detailed comments for explicit memory barrier used by
f2fs, in order to enhance code readability.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: remove unused FORCE_FG_GC macro
Chao Yu [Sat, 20 Feb 2021 09:38:42 +0000 (17:38 +0800)]
f2fs: remove unused FORCE_FG_GC macro

FORCE_FG_GC was introduced by commit 6aefd93b0137 ("f2fs: introduce
background_gc=sync mount option"), but never be used, remove it.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: avoid unused f2fs_show_compress_options()
Chao Yu [Sat, 20 Feb 2021 09:38:41 +0000 (17:38 +0800)]
f2fs: avoid unused f2fs_show_compress_options()

LKP reports:

   fs/f2fs/super.c:1516:20: warning: unused function 'f2fs_show_compress_options' [-Wunused-function]
   static inline void f2fs_show_compress_options(struct seq_file *seq,

Fix this issue by covering f2fs_show_compress_options() with
CONFIG_F2FS_FS_COMPRESSION macro.

Fixes: 4c8ff7095bef ("f2fs: support data compression")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix panic during f2fs_resize_fs()
Chao Yu [Sat, 20 Feb 2021 09:35:41 +0000 (17:35 +0800)]
f2fs: fix panic during f2fs_resize_fs()

f2fs_resize_fs() hangs in below callstack with testcase:
- mkfs 16GB image & mount image
- dd 8GB fileA
- dd 8GB fileB
- sync
- rm fileA
- sync
- resize filesystem to 8GB

kernel BUG at segment.c:2484!
Call Trace:
 allocate_segment_by_default+0x92/0xf0 [f2fs]
 f2fs_allocate_data_block+0x44b/0x7e0 [f2fs]
 do_write_page+0x5a/0x110 [f2fs]
 f2fs_outplace_write_data+0x55/0x100 [f2fs]
 f2fs_do_write_data_page+0x392/0x850 [f2fs]
 move_data_page+0x233/0x320 [f2fs]
 do_garbage_collect+0x14d9/0x1660 [f2fs]
 free_segment_range+0x1f7/0x310 [f2fs]
 f2fs_resize_fs+0x118/0x330 [f2fs]
 __f2fs_ioctl+0x487/0x3680 [f2fs]
 __x64_sys_ioctl+0x8e/0xd0
 do_syscall_64+0x33/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The root cause is we forgot to check that whether we have enough space
in resized filesystem to store all valid blocks in before-resizing
filesystem, then allocator will run out-of-space during block migration
in free_segment_range().

Fixes: b4b10061ef98 ("f2fs: refactor resize_fs to avoid meta updates in progress")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix to allow migrating fully valid segment
Chao Yu [Sat, 20 Feb 2021 09:35:40 +0000 (17:35 +0800)]
f2fs: fix to allow migrating fully valid segment

F2FS_IOC_FLUSH_DEVICE/F2FS_IOC_RESIZE_FS needs to migrate all blocks of
target segment to other place, no matter the segment has partially or fully
valid blocks.

However, after commit 803e74be04b3 ("f2fs: stop GC when the victim becomes
fully valid"), we may skip migration due to target segment is fully valid,
result in failing the ioctl interface, fix this.

Fixes: 803e74be04b3 ("f2fs: stop GC when the victim becomes fully valid")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix a spelling error
xuyehan [Tue, 23 Feb 2021 01:31:43 +0000 (09:31 +0800)]
f2fs: fix a spelling error

Delete the letter 'e' before 'number'

Signed-off-by: xuyehan <xuyehan@xiaomi.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agof2fs: fix a spacing coding style
jiahao [Fri, 19 Feb 2021 12:46:32 +0000 (20:46 +0800)]
f2fs: fix a spacing coding style

Add a space before the plus.

Signed-off-by: jiahao <jiahao@xiaomi.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 years agoMerge tag 'sound-5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 12 Mar 2021 20:01:26 +0000 (12:01 -0800)]
Merge tag 'sound-5.12-rc3' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "No surprise here, only a collection of device-specific fixes for
  USB-audio and HD-audio at this time"

* tag 'sound-5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/hdmi: Cancel pending works before suspend
  ALSA: hda: Avoid spurious unsol event handling during S3/S4
  ALSA: hda: Flush pending unsolicited events before suspend
  ALSA: usb-audio: fix use after free in usb_audio_disconnect
  ALSA: usb-audio: fix NULL ptr dereference in usb_audio_probe
  ALSA: hda/ca0132: Add Sound BlasterX AE-5 Plus support
  ALSA: hda: Drop the BATCH workaround for AMD controllers
  ALSA: hda/conexant: Add quirk for mute LED control on HP ZBook G5
  ALSA: usb-audio: Apply the control quirk to Plantronics headsets
  ALSA: usb-audio: Fix "cannot get freq eq" errors on Dell AE515 sound bar
  ALSA: hda: ignore invalid NHLT table
  ALSA: usb-audio: Disable USB autosuspend properly in setup_disable_autosuspend()
  ALSA: usb: Add Plantronics C320-M USB ctrl msg delay quirk

3 years agoMerge tag 'mmc-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 12 Mar 2021 19:58:33 +0000 (11:58 -0800)]
Merge tag 'mmc-v5.12-rc2' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:

   - Fix partition switch time for eMMC

  MMC host:

   - mmci: Enforce R1B response to fix busy detection for
     the stm32 variants

   - cqhci: Fix crash when removing mmc module/card"

* tag 'mmc-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: cqhci: Fix random crash when remove mmc module/card
  mmc: core: Fix partition switch time for eMMC
  mmc: mmci: Add MMC_CAP_NEED_RSP_BUSY for the stm32 variants

3 years agoMerge tag 'regulator-fix-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 12 Mar 2021 19:55:58 +0000 (11:55 -0800)]
Merge tag 'regulator-fix-v5.12-rc2' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A small collection fo driver specific fixes that have arrived since
  the merge window"

* tag 'regulator-fix-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: mt6315: Fix off-by-one for .n_voltages
  regulator: rt4831: Fix return value check in rt4831_regulator_probe()
  regulator: pca9450: Clear PRESET_EN bit to fix BUCK1/2/3 voltage setting
  regulator: qcom-rpmh: Use correct buck for S1C regulator
  regulator: qcom-rpmh: Correct the pmic5_hfsmps515 buck
  regulator: pca9450: Fix return value when failing to get sd-vsel GPIO
  regulator: mt6315: Return REGULATOR_MODE_INVALID for invalid mode

3 years agoMerge tag 'configfs-for-5.12' of git://git.infradead.org/users/hch/configfs
Linus Torvalds [Fri, 12 Mar 2021 19:48:14 +0000 (11:48 -0800)]
Merge tag 'configfs-for-5.12' of git://git.infradead.org/users/hch/configfs

Pull configfs fix from Christoph Hellwig:

 - fix a use-after-free in __configfs_open_file (Daiyue Zhang)

* tag 'configfs-for-5.12' of git://git.infradead.org/users/hch/configfs:
  configfs: fix a use-after-free in __configfs_open_file

3 years agoMerge tag 'gfs2-v5.12-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 12 Mar 2021 19:46:09 +0000 (11:46 -0800)]
Merge tag 'gfs2-v5.12-rc2-fixes' of git://git./linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:
 "Various gfs2 fixes"

* tag 'gfs2-v5.12-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: bypass log flush if the journal is not live
  gfs2: bypass signal_our_withdraw if no journal
  gfs2: fix use-after-free in trans_drain
  gfs2: make function gfs2_make_fs_ro() to void type

3 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 12 Mar 2021 19:39:53 +0000 (11:39 -0800)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "We've got a smattering of changes all over the place which we've
  acrued since -rc1. To my knowledge, there aren't any pending issues at
  the moment, but there's still plenty of time for something else to
  crop up...

  Summary:

   - Fix booting a 52-bit-VA-aware kernel on Qualcomm Amberwing

   - Fix pfn_valid() not to reject all ZONE_DEVICE memory

   - Fix memory tagging setup for hotplugged memory regions

   - Fix KASAN tagging in page_alloc() when DEBUG_VIRTUAL is enabled

   - Fix accidental truncation of CPU PMU event counters

   - Fix error code initialisation when failing probe of DMC620 PMU

   - Fix return value initialisation for sve-ptrace selftest

   - Drop broken support for CMDLINE_EXTEND"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  perf/arm_dmc620_pmu: Fix error return code in dmc620_pmu_device_probe()
  arm64: mm: remove unused __cpu_uses_extended_idmap[_level()]
  arm64: mm: use a 48-bit ID map when possible on 52-bit VA builds
  arm64: perf: Fix 64-bit event counter read truncation
  arm64/mm: Fix __enable_mmu() for new TGRAN range values
  kselftest: arm64: Fix exit code of sve-ptrace
  arm64: mte: Map hotplugged memory as Normal Tagged
  arm64: kasan: fix page_alloc tagging with DEBUG_VIRTUAL
  arm64/mm: Reorganize pfn_valid()
  arm64/mm: Fix pfn_valid() for ZONE_DEVICE based memory
  arm64/mm: Drop THP conditionality from FORCE_MAX_ZONEORDER
  arm64/mm: Drop redundant ARCH_WANT_HUGE_PMD_SHARE
  arm64: Drop support for CMDLINE_EXTEND
  arm64: cpufeatures: Fix handling of CONFIG_CMDLINE for idreg overrides

3 years agoMerge tag 'for-linus-5.12b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 12 Mar 2021 19:34:36 +0000 (11:34 -0800)]
Merge tag 'for-linus-5.12b-rc3-tag' of git://git./linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Two fix series and a single cleanup:

   - a small cleanup patch to remove unneeded symbol exports

   - a series to cleanup Xen grant handling (avoiding allocations in
     some cases, and using common defines for "invalid" values)

   - a series to address a race issue in Xen event channel handling"

* tag 'for-linus-5.12b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  Xen/gntdev: don't needlessly use kvcalloc()
  Xen/gnttab: introduce common INVALID_GRANT_{HANDLE,REF}
  Xen/gntdev: don't needlessly allocate k{,un}map_ops[]
  Xen: drop exports of {set,clear}_foreign_p2m_mapping()
  xen/events: avoid handling the same event on two cpus at the same time
  xen/events: don't unmask an event channel when an eoi is pending
  xen/events: reset affinity of 2-level event when tearing it down

3 years agogfs2: bypass log flush if the journal is not live
Bob Peterson [Fri, 12 Mar 2021 13:47:47 +0000 (08:47 -0500)]
gfs2: bypass log flush if the journal is not live

Patch fe3e397668775 ("gfs2: Rework the log space allocation logic")
changed gfs2_log_flush to reserve a set of journal blocks in case no
transaction is active.  However, gfs2_log_flush also gets called in
cases where we don't have an active journal, for example, for spectator
mounts.  In that case, trying to reserve blocks would sleep forever, but
we want gfs2_log_flush to be a no-op instead.

Fixes: fe3e397668775 ("gfs2: Rework the log space allocation logic")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agogfs2: bypass signal_our_withdraw if no journal
Bob Peterson [Fri, 12 Mar 2021 12:58:54 +0000 (07:58 -0500)]
gfs2: bypass signal_our_withdraw if no journal

Before this patch, function signal_our_withdraw referenced the journal
inode immediately. But corrupt file systems may have some invalid
journals, in which case our attempt to read it in will withdraw and the
resulting signal_our_withdraw would dereference the NULL value.

This patch adds a check to signal_our_withdraw so that if the journal
has not yet been initialized, it simply returns and does the old-style
withdraw.

Thanks, Andy Price, for his analysis.

Reported-by: syzbot+50a8a9cf8127f2c6f5df@syzkaller.appspotmail.com
Fixes: 601ef0d52e96 ("gfs2: Force withdraw to replay journals and wait for it to finish")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agoperf/arm_dmc620_pmu: Fix error return code in dmc620_pmu_device_probe()
Wei Yongjun [Fri, 12 Mar 2021 08:04:21 +0000 (08:04 +0000)]
perf/arm_dmc620_pmu: Fix error return code in dmc620_pmu_device_probe()

Fix to return negative error code -ENOMEM from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 53c218da220c ("driver/perf: Add PMU driver for the ARM DMC-620 memory controller")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210312080421.277562-1-weiyongjun1@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoMerge tag 'drm-fixes-2021-03-12-1' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 12 Mar 2021 01:38:49 +0000 (17:38 -0800)]
Merge tag 'drm-fixes-2021-03-12-1' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Regular fixes for rc3. The i915 pull was based on the rc1 tag so I
  just cherry-picked the single fix from there to avoid it. The misc and
  amd trees seem to be on okay bases.

  It's a bunch of fixes across the tree, amdgpu has most of them a few
  ttm fixes around qxl, and nouveau.

  core:
   - Clear holes when converting compat ioctl's between 32-bits and
     64-bits.

  docs:
   - Use gitlab for drm bugzilla now.

  ttm:
   - Fix ttm page pool accounting.

  fbdev:
   - Fix oops in drm_fbdev_cleanup()

  shmem:
   - Assorted fixes for shmem helpers.

  qxl:
   - unpin qxl bos created as pinned when freeing them, and make ttm
     only warn once on this behavior.
   - Zero head.surface_id correctly in qxl.

  atyfb:
   - Use LCD management for atyfb on PPC_MAC.

  meson:
   - Shutdown kms poll helper in meson correctly.

  nouveau:
   - fix regression in bo syncing

  i915:
   - Wedge the GPU if command parser setup fails

  amdgpu:
   - Fix aux backlight control
   - Add a backlight override parameter
   - Various display fixes
   - PCIe DPM fix for vega
   - Polaris watermark fixes
   - Additional S0ix fix

  radeon:
   - Fix GEM regression
   - Fix AGP dependency handling"

* tag 'drm-fixes-2021-03-12-1' of git://anongit.freedesktop.org/drm/drm: (33 commits)
  drm/nouveau: fix dma syncing for loops (v2)
  drm/i915: Wedge the GPU if command parser setup fails
  drm/compat: Clear bounce structures
  drm/shmem-helpers: vunmap: Don't put pages for dma-buf
  drm: meson_drv add shutdown function
  drm/shmem-helper: Don't remove the offset in vm_area_struct pgoff
  drm/shmem-helper: Check for purged buffers in fault handler
  qxl: Fix uninitialised struct field head.surface_id
  drm/ttm: Fix TTM page pool accounting
  drm/ttm: soften TTM warnings
  drm: Use USB controller's DMA mask when importing dmabufs
  MAINTAINERS: update drm bug reporting URL
  fbdev: atyfb: use LCD management functions for PPC_PMAC also
  fbdev: atyfb: always declare aty_{ld,st}_lcd()
  drm/qxl: fix lockdep issue in qxl_alloc_release_reserved
  drm/qxl: unpin release objects
  drm/fb-helper: only unmap if buffer not null
  drm/amdgpu: fix S0ix handling when the CONFIG_AMD_PMC=m
  drm/radeon: fix AGP dependency
  drm/radeon: also init GEM funcs in radeon_gem_prime_import_sg_table
  ...

3 years agodrm/nouveau: fix dma syncing for loops (v2)
Dave Airlie [Thu, 11 Mar 2021 04:35:27 +0000 (14:35 +1000)]
drm/nouveau: fix dma syncing for loops (v2)

The index variable should only be increased in one place.

Noticed this while trying to track down another oops.

v2: use while loop.

Fixes: f295c8cfec83 ("drm/nouveau: fix dma syncing warning with debugging on.")
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210311043527.5376-1-airlied@gmail.com
3 years agodrm/i915: Wedge the GPU if command parser setup fails
Tvrtko Ursulin [Tue, 2 Mar 2021 11:42:13 +0000 (11:42 +0000)]
drm/i915: Wedge the GPU if command parser setup fails

Commit 311a50e76a33 ("drm/i915: Add support for mandatory cmdparsing")
introduced mandatory command parsing but setup failures were not
translated into wedging the GPU which was probably the intent.

Possible errors come in two categories. Either the sanity check on
internal tables has failed, which should be caught in CI unless an
affected platform would be missed in testing; or memory allocation failure
happened during driver load, which should be extremely unlikely but for
correctness should still be handled.

v2:
 * Tidy coding style. (Chris)

[airlied: cherry-picked to avoid rc1 base]
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: 311a50e76a33 ("drm/i915: Add support for mandatory cmdparsing")
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris.p.wilson@intel.com>
Reviewed-by: Chris Wilson <chris.p.wilson@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210302114213.1102223-1-tvrtko.ursulin@linux.intel.com
(cherry picked from commit 5a1a659762d35a6dc51047c9127c011303c77b7f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
3 years agoMerge tag 'amd-drm-fixes-5.12-2021-03-10' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 12 Mar 2021 01:20:02 +0000 (11:20 +1000)]
Merge tag 'amd-drm-fixes-5.12-2021-03-10' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-5.12-2021-03-10:

amdgpu:
- Fix aux backlight control
- Add a backlight override parameter
- Various display fixes
- PCIe DPM fix for vega
- Polaris watermark fixes
- Additional S0ix fix

radeon:
- Fix GEM regression
- Fix AGP dependency handling

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210310221141.3974-1-alexander.deucher@amd.com
3 years agoMerge tag 'drm-misc-fixes-2021-03-11' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 12 Mar 2021 00:19:55 +0000 (10:19 +1000)]
Merge tag 'drm-misc-fixes-2021-03-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for rc3, rebased on rc2:
- Fix oops in drm_fbdev_cleanup()
- unpin qxl bos created as pinned when freeing them,
  and make ttm only warn once on this behavior.
- Use LCD management for atyfb on PPC_MAC.
- Use gitlab for drm bugzilla now.
- Fix ttm page pool accounting.
- Zero head.surface_id correctly in qxl.
- Assorted fixes for shmem helpers.
- Shutdown kms poll helper in meson correctly.
- Clear holes when converting compat ioctl's between 32-bits and 64-bits.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4606f08e-d0e8-c543-5e96-cee2fd728a41@linux.intel.com
3 years agoMerge tag 'media/v5.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Thu, 11 Mar 2021 18:39:18 +0000 (10:39 -0800)]
Merge tag 'media/v5.12-2' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:
 "A couple of fixes:

   - fix a build issue with CEC

   - fix a deadlock at usbtv driver

   - fix some null pointer address issues at vsp1 driver

   - fix a wrong bitmap setting at rkisp1 driver"

* tag 'media/v5.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: rkisp1: params: fix wrong bits settings
  media: v4l: vsp1: Fix uif null pointer access
  media: v4l: vsp1: Fix bru null pointer access
  media: usbtv: Fix deadlock on suspend
  media: rc: compile rc-cec.c into rc-core

3 years agoregulator: mt6315: Fix off-by-one for .n_voltages
Axel Lin [Thu, 11 Mar 2021 02:05:58 +0000 (10:05 +0800)]
regulator: mt6315: Fix off-by-one for .n_voltages

The valid selector is 0 ~ 0xbf, so the .n_voltages should be 0xc0.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210311020558.579597-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoarm64: mm: remove unused __cpu_uses_extended_idmap[_level()]
Ard Biesheuvel [Wed, 10 Mar 2021 17:15:12 +0000 (18:15 +0100)]
arm64: mm: remove unused __cpu_uses_extended_idmap[_level()]

These routines lost all existing users during the latest merge window so
we can remove them. This avoids the need to fix them in the context of
fixing a regression related to the ID map on 52-bit VA kernels.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210310171515.416643-3-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64: mm: use a 48-bit ID map when possible on 52-bit VA builds
Ard Biesheuvel [Wed, 10 Mar 2021 17:15:11 +0000 (18:15 +0100)]
arm64: mm: use a 48-bit ID map when possible on 52-bit VA builds

52-bit VA kernels can run on hardware that is only 48-bit capable, but
configure the ID map as 52-bit by default. This was not a problem until
recently, because the special T0SZ value for a 52-bit VA space was never
programmed into the TCR register anwyay, and because a 52-bit ID map
happens to use the same number of translation levels as a 48-bit one.

This behavior was changed by commit 1401bef703a4 ("arm64: mm: Always update
TCR_EL1 from __cpu_set_tcr_t0sz()"), which causes the unsupported T0SZ
value for a 52-bit VA to be programmed into TCR_EL1. While some hardware
simply ignores this, Mark reports that Amberwing systems choke on this,
resulting in a broken boot. But even before that commit, the unsupported
idmap_t0sz value was exposed to KVM and used to program TCR_EL2 incorrectly
as well.

Given that we already have to deal with address spaces being either 48-bit
or 52-bit in size, the cleanest approach seems to be to simply default to
a 48-bit VA ID map, and only switch to a 52-bit one if the placement of the
kernel in DRAM requires it. This is guaranteed not to happen unless the
system is actually 52-bit VA capable.

Fixes: 90ec95cda91a ("arm64: mm: Introduce VA_BITS_MIN")
Reported-by: Mark Salter <msalter@redhat.com>
Link: http://lore.kernel.org/r/20210310003216.410037-1-msalter@redhat.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210310171515.416643-2-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoconfigfs: fix a use-after-free in __configfs_open_file
Daiyue Zhang [Mon, 1 Mar 2021 06:10:53 +0000 (14:10 +0800)]
configfs: fix a use-after-free in __configfs_open_file

Commit b0841eefd969 ("configfs: provide exclusion between IO and removals")
uses ->frag_dead to mark the fragment state, thus no bothering with extra
refcount on config_item when opening a file. The configfs_get_config_item
was removed in __configfs_open_file, but not with config_item_put. So the
refcount on config_item will lost its balance, causing use-after-free
issues in some occasions like this:

Test:
1. Mount configfs on /config with read-only items:
drwxrwx--- 289 root   root            0 2021-04-01 11:55 /config
drwxr-xr-x   2 root   root            0 2021-04-01 11:54 /config/a
--w--w--w-   1 root   root         4096 2021-04-01 11:53 /config/a/1.txt
......

2. Then run:
for file in /config
do
echo $file
grep -R 'key' $file
done

3. __configfs_open_file will be called in parallel, the first one
got called will do:
if (file->f_mode & FMODE_READ) {
if (!(inode->i_mode & S_IRUGO))
goto out_put_module;
config_item_put(buffer->item);
kref_put()
package_details_release()
kfree()

the other one will run into use-after-free issues like this:
BUG: KASAN: use-after-free in __configfs_open_file+0x1bc/0x3b0
Read of size 8 at addr fffffff155f02480 by task grep/13096
CPU: 0 PID: 13096 Comm: grep VIP: 00 Tainted: G        W       4.14.116-kasan #1
TGID: 13096 Comm: grep
Call trace:
dump_stack+0x118/0x160
kasan_report+0x22c/0x294
__asan_load8+0x80/0x88
__configfs_open_file+0x1bc/0x3b0
configfs_open_file+0x28/0x34
do_dentry_open+0x2cc/0x5c0
vfs_open+0x80/0xe0
path_openat+0xd8c/0x2988
do_filp_open+0x1c4/0x2fc
do_sys_open+0x23c/0x404
SyS_openat+0x38/0x48

Allocated by task 2138:
kasan_kmalloc+0xe0/0x1ac
kmem_cache_alloc_trace+0x334/0x394
packages_make_item+0x4c/0x180
configfs_mkdir+0x358/0x740
vfs_mkdir2+0x1bc/0x2e8
SyS_mkdirat+0x154/0x23c
el0_svc_naked+0x34/0x38

Freed by task 13096:
kasan_slab_free+0xb8/0x194
kfree+0x13c/0x910
package_details_release+0x524/0x56c
kref_put+0xc4/0x104
config_item_put+0x24/0x34
__configfs_open_file+0x35c/0x3b0
configfs_open_file+0x28/0x34
do_dentry_open+0x2cc/0x5c0
vfs_open+0x80/0xe0
path_openat+0xd8c/0x2988
do_filp_open+0x1c4/0x2fc
do_sys_open+0x23c/0x404
SyS_openat+0x38/0x48
el0_svc_naked+0x34/0x38

To fix this issue, remove the config_item_put in
__configfs_open_file to balance the refcount of config_item.

Fixes: b0841eefd969 ("configfs: provide exclusion between IO and removals")
Signed-off-by: Daiyue Zhang <zhangdaiyue1@huawei.com>
Signed-off-by: Yi Chen <chenyi77@huawei.com>
Signed-off-by: Ge Qiu <qiuge@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
3 years agomedia: rkisp1: params: fix wrong bits settings
Dafna Hirschfeld [Mon, 1 Mar 2021 17:18:35 +0000 (18:18 +0100)]
media: rkisp1: params: fix wrong bits settings

The histogram mode is set using 'rkisp1_params_set_bits'.
Only the bits of the mode should be the value argument for
that function. Otherwise bits outside the mode mask are
turned on which is not what was intended.

Fixes: bae1155cf579 ("media: staging: rkisp1: add output device for parameters")
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
3 years agomedia: v4l: vsp1: Fix uif null pointer access
Biju Das [Mon, 1 Mar 2021 12:08:28 +0000 (13:08 +0100)]
media: v4l: vsp1: Fix uif null pointer access

RZ/G2L SoC has no UIF. This patch fixes null pointer access, when UIF
module is not used.

Fixes: 5e824f989e6e8("media: v4l: vsp1: Integrate DISCOM in display pipeline")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
3 years agomedia: v4l: vsp1: Fix bru null pointer access
Biju Das [Mon, 1 Mar 2021 12:08:27 +0000 (13:08 +0100)]
media: v4l: vsp1: Fix bru null pointer access

RZ/G2L SoC has only BRS. This patch fixes null pointer access,when only
BRS is enabled.

Fixes: cbb7fa49c7466("media: v4l: vsp1: Rename BRU to BRx")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
3 years agomedia: usbtv: Fix deadlock on suspend
Maxim Mikityanskiy [Fri, 5 Feb 2021 22:51:39 +0000 (23:51 +0100)]
media: usbtv: Fix deadlock on suspend

usbtv doesn't support power management, so on system suspend the
.disconnect callback of the driver is called. The teardown sequence
includes a call to snd_card_free. Its implementation waits until the
refcount of the sound card device drops to zero, however, if its file is
open, snd_card_file_add takes a reference, which can't be dropped during
the suspend, because the userspace processes are already frozen at this
point. snd_card_free waits for completion forever, leading to a hang on
suspend.

This commit fixes this deadlock condition by replacing snd_card_free
with snd_card_free_when_closed, that doesn't wait until all references
are released, allowing suspend to progress.

Fixes: 63ddf68de52e ("[media] usbtv: add audio support")
Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
3 years agomedia: rc: compile rc-cec.c into rc-core
Hans Verkuil [Fri, 26 Feb 2021 10:37:47 +0000 (11:37 +0100)]
media: rc: compile rc-cec.c into rc-core

The rc-cec keymap is unusual in that it can't be built as a module,
instead it is registered directly in rc-main.c if CONFIG_MEDIA_CEC_RC
is set. This is because it can be called from drm_dp_cec_set_edid() via
cec_register_adapter() in an asynchronous context, and it is not
allowed to use request_module() to load rc-cec.ko in that case. Trying to
do so results in a 'WARN_ON_ONCE(wait && current_is_async())'.

Since this keymap is only used if CONFIG_MEDIA_CEC_RC is set, we
just compile this keymap into the rc-core module and never as a
separate module.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: 2c6d1fffa1d9 (drm: add support for DisplayPort CEC-Tunneling-over-AUX)
Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
3 years agodrm/compat: Clear bounce structures
Daniel Vetter [Mon, 22 Feb 2021 10:06:43 +0000 (11:06 +0100)]
drm/compat: Clear bounce structures

Some of them have gaps, or fields we don't clear. Native ioctl code
does full copies plus zero-extends on size mismatch, so nothing can
leak. But compat is more hand-rolled so need to be careful.

None of these matter for performance, so just memset.

Also I didn't fix up the CONFIG_DRM_LEGACY or CONFIG_DRM_AGP ioctl, those
are security holes anyway.

Acked-by: Maxime Ripard <mripard@kernel.org>
Reported-by: syzbot+620cf21140fc7e772a5d@syzkaller.appspotmail.com # vblank ioctl
Cc: syzbot+620cf21140fc7e772a5d@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210222100643.400935-1-daniel.vetter@ffwll.ch
(cherry picked from commit e926c474ebee404441c838d18224cd6f246a71b7)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/shmem-helpers: vunmap: Don't put pages for dma-buf
Noralf Trønnes [Fri, 19 Feb 2021 12:22:03 +0000 (13:22 +0100)]
drm/shmem-helpers: vunmap: Don't put pages for dma-buf

dma-buf importing was reworked in commit 7d2cd72a9aa3
("drm/shmem-helpers: Simplify dma-buf importing"). Before that commit
drm_gem_shmem_prime_import_sg_table() did set ->pages_use_count=1 and
drm_gem_shmem_vunmap_locked() could call drm_gem_shmem_put_pages()
unconditionally. Now without the use count set, put pages is called also
on dma-bufs. Fix this by only putting pages if it's not imported.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Fixes: 7d2cd72a9aa3 ("drm/shmem-helpers: Simplify dma-buf importing")
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210219122203.51130-1-noralf@tronnes.org
(cherry picked from commit cdea72518a2b38207146e92e1c9e2fac15975679)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm: meson_drv add shutdown function
Artem Lapkin [Tue, 2 Mar 2021 04:22:02 +0000 (12:22 +0800)]
drm: meson_drv add shutdown function

Problem: random stucks on reboot stage about 1/20 stuck/reboots
// debug kernel log
[    4.496660] reboot: kernel restart prepare CMD:(null)
[    4.498114] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
[    4.503949] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...
...STUCK...

Solution: add shutdown function to meson_drm driver
// debug kernel log
[    5.231896] reboot: kernel restart prepare CMD:(null)
[    5.246135] [drm:meson_drv_shutdown]
...
[    5.259271] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
[    5.274688] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...
[    5.338331] reboot: Restarting system
[    5.358293] psci: PSCI_0_2_FN_SYSTEM_RESET reboot_mode:0 cmd:(null)
bl31 reboot reason: 0xd
bl31 reboot reason: 0x0
system cmd  1.
...REBOOT...

Tested: on VIM1 VIM2 VIM3 VIM3L khadas sbcs - 1000+ successful reboots
and Odroid boards, WeTek Play2 (GXBB)

Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Artem Lapkin <art@khadas.com>
Tested-by: Christian Hewitt <christianshewitt@gmail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210302042202.3728113-1-art@khadas.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/shmem-helper: Don't remove the offset in vm_area_struct pgoff
Neil Roberts [Tue, 23 Feb 2021 15:51:25 +0000 (16:51 +0100)]
drm/shmem-helper: Don't remove the offset in vm_area_struct pgoff

When mmapping the shmem, it would previously adjust the pgoff in the
vm_area_struct to remove the fake offset that is added to be able to
identify the buffer. This patch removes the adjustment and makes the
fault handler use the vm_fault address to calculate the page offset
instead. Although using this address is apparently discouraged, several
DRM drivers seem to be doing it anyway.

The problem with removing the pgoff is that it prevents
drm_vma_node_unmap from working because that searches the mapping tree
by address. That doesn't work because all of the mappings are at offset
0. drm_vma_node_unmap is being used by the shmem helpers when purging
the buffer.

This fixes a bug in Panfrost which is using drm_gem_shmem_purge. Without
this the mapping for the purged buffer can still be accessed which might
mean it would access random pages from other buffers

v2: Don't check whether the unsigned page_offset is less than 0.

Cc: stable@vger.kernel.org
Fixes: 17acb9f35ed7 ("drm/shmem: Add madvise state and purge helpers")
Signed-off-by: Neil Roberts <nroberts@igalia.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210223155125.199577-3-nroberts@igalia.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/shmem-helper: Check for purged buffers in fault handler
Neil Roberts [Tue, 23 Feb 2021 15:51:24 +0000 (16:51 +0100)]
drm/shmem-helper: Check for purged buffers in fault handler

When a buffer is madvised as not needed and then purged, any attempts to
access the buffer from user-space should cause a bus fault. This patch
adds a check for that.

Cc: stable@vger.kernel.org
Fixes: 17acb9f35ed7 ("drm/shmem: Add madvise state and purge helpers")
Signed-off-by: Neil Roberts <nroberts@igalia.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210223155125.199577-2-nroberts@igalia.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agoqxl: Fix uninitialised struct field head.surface_id
Colin Ian King [Thu, 4 Mar 2021 09:49:28 +0000 (09:49 +0000)]
qxl: Fix uninitialised struct field head.surface_id

The surface_id struct field in head is not being initialized and
static analysis warns that this is being passed through to
dev->monitors_config->heads[i] on an assignment. Clear up this
warning by initializing it to zero.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: a6d3c4d79822 ("qxl: hook monitors_config updates into crtc, not encoder.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210304094928.2280722-1-colin.king@canonical.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/ttm: Fix TTM page pool accounting
Anthony DeRossi [Wed, 3 Mar 2021 01:17:25 +0000 (17:17 -0800)]
drm/ttm: Fix TTM page pool accounting

Freed pages are not subtracted from the allocated_pages counter in
ttm_pool_type_fini(), causing a leak in the count on device removal.
The next shrinker invocation loops forever trying to free pages that are
no longer in the pool:

  rcu: INFO: rcu_sched self-detected stall on CPU
  rcu:  3-....: (9998 ticks this GP) idle=54e/1/0x4000000000000000 softirq=434857/434857 fqs=2237
    (t=10001 jiffies g=2194533 q=49211)
  NMI backtrace for cpu 3
  CPU: 3 PID: 1034 Comm: kswapd0 Tainted: P           O      5.11.0-com #1
  Hardware name: System manufacturer System Product Name/PRIME X570-PRO, BIOS 1405 11/19/2019
  Call Trace:
   <IRQ>
   ...
   </IRQ>
   sysvec_apic_timer_interrupt+0x77/0x80
   asm_sysvec_apic_timer_interrupt+0x12/0x20
  RIP: 0010:mutex_unlock+0x16/0x20
  Code: e7 48 8b 70 10 e8 7a 53 77 ff eb aa e8 43 6c ff ff 0f 1f 00 65 48 8b 14 25 00 6d 01 00 31 c9 48 89 d0 f0 48 0f b1 0f 48 39 c2 <74> 05 e9 e3 fe ff ff c3 66 90 48 8b 47 20 48 85 c0 74 0f 8b 50 10
  RSP: 0018:ffffbdb840797be8 EFLAGS: 00000246
  RAX: ffff9ff445a41c00 RBX: ffffffffc02a9ef8 RCX: 0000000000000000
  RDX: ffff9ff445a41c00 RSI: ffffbdb840797c78 RDI: ffffffffc02a9ac0
  RBP: 0000000000000080 R08: 0000000000000000 R09: ffffbdb840797c80
  R10: 0000000000000000 R11: fffffffffffffff5 R12: 0000000000000000
  R13: 0000000000000000 R14: 0000000000000084 R15: ffffffffc02a9a60
   ttm_pool_shrink+0x7d/0x90 [ttm]
   ttm_pool_shrinker_scan+0x5/0x20 [ttm]
   do_shrink_slab+0x13a/0x1a0
...

debugfs shows the incorrect total:

  $ cat /sys/kernel/debug/dri/0/ttm_page_pool
            --- 0--- --- 1--- --- 2--- --- 3--- --- 4--- --- 5--- --- 6--- --- 7--- --- 8--- --- 9--- ---10---
  wc      :        0        0        0        0        0        0        0        0        0        0        0
  uc      :        0        0        0        0        0        0        0        0        0        0        0
  wc 32   :        0        0        0        0        0        0        0        0        0        0        0
  uc 32   :        0        0        0        0        0        0        0        0        0        0        0
  DMA uc  :        0        0        0        0        0        0        0        0        0        0        0
  DMA wc  :        0        0        0        0        0        0        0        0        0        0        0
  DMA     :        0        0        0        0        0        0        0        0        0        0        0

  total   :     3029 of  8244261

Using ttm_pool_type_take() to remove pages from the pool before freeing
them correctly accounts for the freed pages.

Fixes: d099fc8f540a ("drm/ttm: new TT backend allocation pool v3")
Signed-off-by: Anthony DeRossi <ajderossi@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210303011723.22512-1-ajderossi@gmail.com
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/ttm: soften TTM warnings
Christian König [Wed, 3 Mar 2021 14:47:14 +0000 (15:47 +0100)]
drm/ttm: soften TTM warnings

QXL indeed unrefs pinned BOs and the warnings are spamming peoples log files.

Make sure we warn only once until the QXL driver is fixed.

Signed-off-by: Christian König <christian.koenig@amd.com>
References: https://lore.kernel.org/lkml/YD+eYcMMcdlXB8PY@alley/
Link: https://patchwork.freedesktop.org/patch/422834/
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm: Use USB controller's DMA mask when importing dmabufs
Thomas Zimmermann [Wed, 3 Mar 2021 13:32:29 +0000 (14:32 +0100)]
drm: Use USB controller's DMA mask when importing dmabufs

USB devices cannot perform DMA and hence have no dma_mask set in their
device structure. Therefore importing dmabuf into a USB-based driver
fails, which breaks joining and mirroring of display in X11.

For USB devices, pick the associated USB controller as attachment device.
This allows the DRM import helpers to perform the DMA setup. If the DMA
controller does not support DMA transfers, we're out of luck and cannot
import. Our current USB-based DRM drivers don't use DMA, so the actual
DMA device is not important.

Tested by joining/mirroring displays of udl and radeon under Gnome/X11.

v8:
* release dmadev if device initialization fails (Noralf)
* fix commit description (Noralf)
v7:
* fix use-before-init bug in gm12u320 (Dan)
v6:
* implement workaround in DRM drivers and hold reference to
  DMA device while USB device is in use
* remove dev_is_usb() (Greg)
* collapse USB helper into usb_intf_get_dma_device() (Alan)
* integrate Daniel's TODO statement (Daniel)
* fix typos (Greg)
v5:
* provide a helper for USB interfaces (Alan)
* add FIXME item to documentation and TODO list (Daniel)
v4:
* implement workaround with USB helper functions (Greg)
* use struct usb_device->bus->sysdev as DMA device (Takashi)
v3:
* drop gem_create_object
* use DMA mask of USB controller, if any (Daniel, Christian, Noralf)
v2:
* move fix to importer side (Christian, Daniel)
* update SHMEM and CMA helpers for new PRIME callbacks

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 6eb0233ec2d0 ("usb: don't inherity DMA properties for USB devices")
Tested-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org> # v5.10+
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210303133229.3288-1-tzimmermann@suse.de
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agoMAINTAINERS: update drm bug reporting URL
Pavel Turinský [Sun, 28 Feb 2021 16:36:58 +0000 (17:36 +0100)]
MAINTAINERS: update drm bug reporting URL

The original bugzilla seems to be read-only now, linking to the gitlab
for new bugs.

Signed-off-by: Pavel Turinský <ledoian@kam.mff.cuni.cz>
Cc: trivial@kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210228163658.54962-1-ledoian@kam.mff.cuni.cz
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agofbdev: atyfb: use LCD management functions for PPC_PMAC also
Randy Dunlap [Fri, 26 Feb 2021 17:30:08 +0000 (09:30 -0800)]
fbdev: atyfb: use LCD management functions for PPC_PMAC also

Include PPC_PMAC in the configs that use aty_ld_lcd() and
aty_st_lcd() implementations so that the PM code may work
correctly for PPC_PMAC.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210226173008.18236-1-rdunlap@infradead.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agofbdev: atyfb: always declare aty_{ld,st}_lcd()
Randy Dunlap [Wed, 24 Feb 2021 21:55:28 +0000 (13:55 -0800)]
fbdev: atyfb: always declare aty_{ld,st}_lcd()

The previously added stubs for aty_{ld,}st_lcd() make it
so that these functions are used regardless of the config
options that were guarding them, so remove the #ifdef/#endif
lines and make their declarations always visible.
This fixes build warnings that were reported by clang:

   drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd' [-Wmissing-prototypes]
   void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
        ^
   drivers/video/fbdev/aty/atyfb_base.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)

   drivers/video/fbdev/aty/atyfb_base.c:183:5: warning: no previous prototype for function 'aty_ld_lcd' [-Wmissing-prototypes]
   u32 aty_ld_lcd(int index, const struct atyfb_par *par)
       ^
   drivers/video/fbdev/aty/atyfb_base.c:183:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   u32 aty_ld_lcd(int index, const struct atyfb_par *par)

They should not be marked as static since they are used in
mach64_ct.c.

Fixes: bfa5782b9caa ("fbdev: atyfb: add stubs for aty_{ld,st}_lcd()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210224215528.822-1-rdunlap@infradead.org
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/qxl: fix lockdep issue in qxl_alloc_release_reserved
Gerd Hoffmann [Wed, 17 Feb 2021 12:32:06 +0000 (13:32 +0100)]
drm/qxl: fix lockdep issue in qxl_alloc_release_reserved

Call qxl_bo_unpin (which does a reservation) without holding the
release_mutex lock.  Fixes lockdep (correctly) warning on a possible
deadlock.

Fixes: e8dd3506dcf3 ("drm/qxl: unpin release objects")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20210217123213.2199186-5-kraxel@redhat.com
(cherry picked from commit 19089b760e56c97458c272e90e43da761b05cf12)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/qxl: unpin release objects
Gerd Hoffmann [Thu, 4 Feb 2021 14:57:05 +0000 (15:57 +0100)]
drm/qxl: unpin release objects

Balances the qxl_create_bo(..., pinned=true, ...);
call in qxl_release_bo_alloc().

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20210204145712.1531203-5-kraxel@redhat.com
(cherry picked from commit 65ffea3c6e738f37bb15ff3ee480415c793df893)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agodrm/fb-helper: only unmap if buffer not null
Tong Zhang [Sun, 28 Feb 2021 04:46:25 +0000 (23:46 -0500)]
drm/fb-helper: only unmap if buffer not null

drm_fbdev_cleanup() can be called when fb_helper->buffer is null, hence
fb_helper->buffer should be checked before calling
drm_client_buffer_vunmap(). This buffer is also checked in
drm_client_framebuffer_delete(), so we should also do the same thing for
drm_client_buffer_vunmap().

[  199.128742] RIP: 0010:drm_client_buffer_vunmap+0xd/0x20
[  199.129031] Code: 43 18 48 8b 53 20 49 89 45 00 49 89 55 08 5b 44 89 e0 41 5c 41 5d 41 5e 5d
c3 0f 1f 00 53 48 89 fb 48 8d 7f 10 e8 73 7d a1 ff <48> 8b 7b 10 48 8d 73 18 5b e9 75 53 fc ff 0
f 1f 44 00 00 48 b8 00
[  199.130041] RSP: 0018:ffff888103f3fc88 EFLAGS: 00010282
[  199.130329] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8214d46d
[  199.130733] RDX: 1ffffffff079c6b9 RSI: 0000000000000246 RDI: ffffffff83ce35c8
[  199.131119] RBP: ffff888103d25458 R08: 0000000000000001 R09: fffffbfff0791761
[  199.131505] R10: ffffffff83c8bb07 R11: fffffbfff0791760 R12: 0000000000000000
[  199.131891] R13: ffff888103d25468 R14: ffff888103d25418 R15: ffff888103f18120
[  199.132277] FS:  00007f36fdcbb6a0(0000) GS:ffff88815b400000(0000) knlGS:0000000000000000
[  199.132721] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  199.133033] CR2: 0000000000000010 CR3: 0000000103d26000 CR4: 00000000000006f0
[  199.133420] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  199.133807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  199.134195] Call Trace:
[  199.134333]  drm_fbdev_cleanup+0x179/0x1a0
[  199.134562]  drm_fbdev_client_unregister+0x2b/0x40
[  199.134828]  drm_client_dev_unregister+0xa8/0x180
[  199.135088]  drm_dev_unregister+0x61/0x110
[  199.135315]  mgag200_pci_remove+0x38/0x52 [mgag200]
[  199.135586]  pci_device_remove+0x62/0xe0
[  199.135806]  device_release_driver_internal+0x148/0x270
[  199.136094]  driver_detach+0x76/0xe0
[  199.136294]  bus_remove_driver+0x7e/0x100
[  199.136521]  pci_unregister_driver+0x28/0xf0
[  199.136759]  __x64_sys_delete_module+0x268/0x300
[  199.137016]  ? __ia32_sys_delete_module+0x300/0x300
[  199.137285]  ? call_rcu+0x3e4/0x580
[  199.137481]  ? fpregs_assert_state_consistent+0x4d/0x60
[  199.137767]  ? exit_to_user_mode_prepare+0x2f/0x130
[  199.138037]  do_syscall_64+0x33/0x40
[  199.138237]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  199.138517] RIP: 0033:0x7f36fdc3dcf7

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Fixes: 763aea17bf57 ("drm/fb-helper: Unmap client buffer during shutdown")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.11+
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210228044625.171151-1-ztong0001@gmail.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
3 years agoXen/gntdev: don't needlessly use kvcalloc()
Jan Beulich [Wed, 10 Mar 2021 10:46:13 +0000 (11:46 +0100)]
Xen/gntdev: don't needlessly use kvcalloc()

Requesting zeroed memory when all of it will be overwritten subsequently
by all ones is a waste of processing bandwidth. In fact, rather than
recording zeroed ->grants[], fill that array too with more appropriate
"invalid" indicators.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/9a726be2-4893-8ffe-0ef1-b70dd1c229b1@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoXen/gnttab: introduce common INVALID_GRANT_{HANDLE,REF}
Jan Beulich [Wed, 10 Mar 2021 10:45:26 +0000 (11:45 +0100)]
Xen/gnttab: introduce common INVALID_GRANT_{HANDLE,REF}

It's not helpful if every driver has to cook its own. Generalize
xenbus'es INVALID_GRANT_HANDLE and pcifront's INVALID_GRANT_REF (which
shouldn't have expanded to zero to begin with). Use the constants in
p2m.c and gntdev.c right away, and update field types where necessary so
they would match with the constants' types (albeit without touching
struct ioctl_gntdev_grant_ref's ref field, as that's part of the public
interface of the kernel and would require introducing a dependency on
Xen's grant_table.h public header).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/db7c38a5-0d75-d5d1-19de-e5fe9f0b9c48@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoXen/gntdev: don't needlessly allocate k{,un}map_ops[]
Jan Beulich [Wed, 10 Mar 2021 10:45:00 +0000 (11:45 +0100)]
Xen/gntdev: don't needlessly allocate k{,un}map_ops[]

They're needed only in the not-auto-translate (i.e. PV) case; there's no
point in allocating memory that's never going to get accessed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/180d50cb-5531-8952-4bf0-d65c554638ed@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoXen: drop exports of {set,clear}_foreign_p2m_mapping()
Jan Beulich [Tue, 9 Mar 2021 17:00:44 +0000 (18:00 +0100)]
Xen: drop exports of {set,clear}_foreign_p2m_mapping()

They're only used internally, and the layering violation they contain
(x86) or imply (Arm) of calling HYPERVISOR_grant_table_op() strongly
advise against any (uncontrolled) use from a module. The functions also
never had users except the ones from drivers/xen/grant-table.c forever
since their introduction in 3.15.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/746a5cd6-1446-eda4-8b23-03c1cac30b8d@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoxen/events: avoid handling the same event on two cpus at the same time
Juergen Gross [Sat, 6 Mar 2021 16:18:33 +0000 (17:18 +0100)]
xen/events: avoid handling the same event on two cpus at the same time

When changing the cpu affinity of an event it can happen today that
(with some unlucky timing) the same event will be handled on the old
and the new cpu at the same time.

Avoid that by adding an "event active" flag to the per-event data and
call the handler only if this flag isn't set.

Cc: stable@vger.kernel.org
Reported-by: Julien Grall <julien@xen.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Julien Grall <jgrall@amazon.com>
Link: https://lore.kernel.org/r/20210306161833.4552-4-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoxen/events: don't unmask an event channel when an eoi is pending
Juergen Gross [Sat, 6 Mar 2021 16:18:32 +0000 (17:18 +0100)]
xen/events: don't unmask an event channel when an eoi is pending

An event channel should be kept masked when an eoi is pending for it.
When being migrated to another cpu it might be unmasked, though.

In order to avoid this keep three different flags for each event channel
to be able to distinguish "normal" masking/unmasking from eoi related
masking/unmasking and temporary masking. The event channel should only
be able to generate an interrupt if all flags are cleared.

Cc: stable@vger.kernel.org
Fixes: 54c9de89895e ("xen/events: add a new "late EOI" evtchn framework")
Reported-by: Julien Grall <julien@xen.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Link: https://lore.kernel.org/r/20210306161833.4552-3-jgross@suse.com
[boris -- corrected Fixed tag format]

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agodrm/amdgpu: fix S0ix handling when the CONFIG_AMD_PMC=m
Alex Deucher [Wed, 10 Mar 2021 03:58:47 +0000 (22:58 -0500)]
drm/amdgpu: fix S0ix handling when the CONFIG_AMD_PMC=m

Need to check the module variant as well.

Acked-by: Prike Liang <Prike.Liang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/radeon: fix AGP dependency
Christian König [Mon, 8 Mar 2021 18:22:13 +0000 (19:22 +0100)]
drm/radeon: fix AGP dependency

When AGP is compiled as module radeon must be compiled as module as
well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agodrm/radeon: also init GEM funcs in radeon_gem_prime_import_sg_table
Christian König [Mon, 8 Mar 2021 18:35:14 +0000 (19:35 +0100)]
drm/radeon: also init GEM funcs in radeon_gem_prime_import_sg_table

Otherwise we will run into a NULL ptr deref.

Signed-off-by: Christian König <christian.koenig@amd.com>
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=212137
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 5.11.x
3 years agodrm/amd/pm: correct the watermark settings for Polaris
Evan Quan [Fri, 5 Mar 2021 06:21:26 +0000 (14:21 +0800)]
drm/amd/pm: correct the watermark settings for Polaris

The "/ 10" should be applied to the right-hand operand instead of
the left-hand one.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Noticed-by: Georgios Toptsidis <gtoptsid@gmail.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amd/pm: bug fix for pcie dpm
Kenneth Feng [Tue, 9 Mar 2021 13:10:16 +0000 (21:10 +0800)]
drm/amd/pm: bug fix for pcie dpm

Currently the pcie dpm has two problems.
1. Only the high dpm level speed/width can be overrided
if the requested values are out of the pcie capability.
2. The high dpm level is always overrided though sometimes
it's not necesarry.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amdgpu: fb BO should be ttm_bo_type_device
Nirmoy Das [Mon, 8 Mar 2021 14:22:22 +0000 (15:22 +0100)]
drm/amdgpu: fb BO should be ttm_bo_type_device

FB BO should not be ttm_bo_type_kernel type and
amdgpufb_create_pinned_object() pins the FB BO anyway.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agodrm/amdgpu/display: Use wm_table.entries for dcn301 calculate_wm
Zhan Liu [Tue, 9 Mar 2021 01:28:22 +0000 (20:28 -0500)]
drm/amdgpu/display: Use wm_table.entries for dcn301 calculate_wm

[Why]
For DGPU Navi, the wm_table.nv_entries are used. These entires are not
populated for DCN301 Vangogh APU, but instead wm_table.entries are.

[How]
Use DCN21 Renoir style wm calculations.

Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Zhan Liu <zhan.liu@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Zhan Liu <zhan.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agodrm/amd/display: Enabled pipe harvesting in dcn30
Dillon Varone [Fri, 19 Feb 2021 23:15:30 +0000 (18:15 -0500)]
drm/amd/display: Enabled pipe harvesting in dcn30

[Why & How]
Ported logic from dcn21 for reading in pipe fusing to dcn30.
Supported configurations are 1 and 6 pipes. Invalid fusing
will revert to 1 pipe being enabled.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agodrm/amd/display: Revert dram_clock_change_latency for DCN2.1
Sung Lee [Fri, 26 Feb 2021 18:20:43 +0000 (13:20 -0500)]
drm/amd/display: Revert dram_clock_change_latency for DCN2.1

[WHY & HOW]
Using values provided by DF for latency may cause hangs in
multi display configurations. Revert change to previous value.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Haonan Wang <Haonan.Wang2@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agoMerge tag 's390-5.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Wed, 10 Mar 2021 21:15:16 +0000 (13:15 -0800)]
Merge tag 's390-5.12-3' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - fix various user space visible copy_to_user() instances which return
   the number of bytes left to copy instead of -EFAULT

 - make TMPFS_INODE64 available again for s390 and alpha, now that both
   architectures have been switched to 64-bit ino_t (see commit
   96c0a6a72d18: "s390,alpha: switch to 64-bit ino_t")

 - make sure to release a shared hypervisor resource within the zcore
   device driver also on restart and power down; also remove unneeded
   surrounding debugfs_create return value checks

 - for the new hardware counter set device driver rename the uapi header
   file to be a bit more generic; also remove 60 second read limit which
   is not really necessary and without the limit the interface can be
   easier tested

 - some small cleanups, the largest being to convert all long long in
   our time and idle code to longs

 - update defconfigs

* tag 's390-5.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: remove IBM_PARTITION and CONFIGFS_FS from zfcpdump defconfig
  s390: update defconfigs
  s390,alpha: make TMPFS_INODE64 available again
  s390/cio: return -EFAULT if copy_to_user() fails
  s390/tty3270: avoid comma separated statements
  s390/cpumf: remove unneeded semicolon
  s390/crypto: return -EFAULT if copy_to_user() fails
  s390/cio: return -EFAULT if copy_to_user() fails
  s390/cpumf: rename header file to hwctrset.h
  s390/zcore: release dump save area on restart or power down
  s390/zcore: no need to check return value of debugfs_create functions
  s390/cpumf: remove 60 seconds read limit
  s390/topology: remove always false if check
  s390/time,idle: get rid of unsigned long long

3 years agodrm/amd/display: Enable pflip interrupt upon pipe enable
Qingqing Zhuo [Fri, 19 Feb 2021 22:17:50 +0000 (17:17 -0500)]
drm/amd/display: Enable pflip interrupt upon pipe enable

[Why]
pflip interrupt would not be enabled promptly if a pipe is disabled
and re-enabled, causing flip_done timeout error during DP
compliance tests

[How]
Enable pflip interrupt upon pipe enablement

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 years agodrm/amdgpu/display: use GFP_ATOMIC in dcn21_validate_bandwidth_fp()
Holger Hoffstätte [Fri, 5 Mar 2021 14:23:18 +0000 (15:23 +0100)]
drm/amdgpu/display: use GFP_ATOMIC in dcn21_validate_bandwidth_fp()

After fixing nested FPU contexts caused by 41401ac67791 we're still seeing
complaints about spurious kernel_fpu_end(). As it turns out this was
already fixed for dcn20 in commit f41ed88cbd ("drm/amdgpu/display:
use GFP_ATOMIC in dcn20_validate_bandwidth_internal") but never moved
forward to dcn21.

Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amd/display: Fix nested FPU context in dcn21_validate_bandwidth()
Holger Hoffstätte [Fri, 5 Mar 2021 11:39:21 +0000 (12:39 +0100)]
drm/amd/display: Fix nested FPU context in dcn21_validate_bandwidth()

Commit 41401ac67791 added FPU wrappers to dcn21_validate_bandwidth(),
which was correct. Unfortunately a nested function alredy contained
DC_FP_START()/DC_FP_END() calls, which results in nested FPU context
enter/exit and complaints by kernel_fpu_begin_mask().
This can be observed e.g. with 5.10.20, which backported 41401ac67791
and now emits the following warning on boot:

WARNING: CPU: 6 PID: 858 at arch/x86/kernel/fpu/core.c:129 kernel_fpu_begin_mask+0xa5/0xc0
Call Trace:
 dcn21_calculate_wm+0x47/0xa90 [amdgpu]
 dcn21_validate_bandwidth_fp+0x15d/0x2b0 [amdgpu]
 dcn21_validate_bandwidth+0x29/0x40 [amdgpu]
 dc_validate_global_state+0x3c7/0x4c0 [amdgpu]

The warning is emitted due to the additional DC_FP_START/END calls in
patch_bounding_box(), which is inlined into dcn21_calculate_wm(),
its only caller. Removing the calls brings the code in line with
dcn20 and makes the warning disappear.

Fixes: 41401ac67791 ("drm/amd/display: Add FPU wrappers to dcn21_validate_bandwidth()")
Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amd/display: Add a backlight module option
Takashi Iwai [Wed, 3 Feb 2021 12:42:41 +0000 (13:42 +0100)]
drm/amd/display: Add a backlight module option

There seem devices that don't work with the aux channel backlight
control.  For allowing such users to test with the other backlight
control method, provide a new module option, aux_backlight, to specify
enabling or disabling the aux backport support explicitly.  As
default, the aux support is detected by the hardware capability.

v2: make the backlight option generic in case we add future
backlight types (Alex)

BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=1180749
BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1438
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amdgpu/display: handle aux backlight in backlight_get_brightness
Alex Deucher [Thu, 10 Dec 2020 06:45:12 +0000 (01:45 -0500)]
drm/amdgpu/display: handle aux backlight in backlight_get_brightness

Need to fetch it via aux.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amdgpu/display: don't assert in set backlight function
Alex Deucher [Thu, 10 Dec 2020 06:20:08 +0000 (01:20 -0500)]
drm/amdgpu/display: don't assert in set backlight function

It just spams the logs.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agodrm/amdgpu/display: simplify backlight setting
Alex Deucher [Thu, 10 Dec 2020 06:18:40 +0000 (01:18 -0500)]
drm/amdgpu/display: simplify backlight setting

Avoid the extra wrapper function.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
3 years agoRevert "mm, slub: consider rest of partial list if acquire_slab() fails"
Linus Torvalds [Wed, 10 Mar 2021 18:18:04 +0000 (10:18 -0800)]
Revert "mm, slub: consider rest of partial list if acquire_slab() fails"

This reverts commit 8ff60eb052eeba95cfb3efe16b08c9199f8121cf.

The kernel test robot reports a huge performance regression due to the
commit, and the reason seems fairly straightforward: when there is
contention on the page list (which is what causes acquire_slab() to
fail), we do _not_ want to just loop and try again, because that will
transfer the contention to the 'n->list_lock' spinlock we hold, and
just make things even worse.

This is admittedly likely a problem only on big machines - the kernel
test robot report comes from a 96-thread dual socket Intel Xeon Gold
6252 setup, but the regression there really is quite noticeable:

   -47.9% regression of stress-ng.rawpkt.ops_per_sec

and the commit that was marked as being fixed (7ced37197196: "slub:
Acquire_slab() avoid loop") actually did the loop exit early very
intentionally (the hint being that "avoid loop" part of that commit
message), exactly to avoid this issue.

The correct thing to do may be to pick some kind of reasonable middle
ground: instead of breaking out of the loop on the very first sign of
contention, or trying over and over and over again, the right thing may
be to re-try _once_, and then give up on the second failure (or pick
your favorite value for "once"..).

Reported-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/lkml/20210301080404.GF12822@xsang-OptiPlex-9020/
Cc: Jann Horn <jannh@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoMerge tag 'for-linus-2021-03-10' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 10 Mar 2021 18:01:35 +0000 (10:01 -0800)]
Merge tag 'for-linus-2021-03-10' of git://git./linux/kernel/git/brauner/linux

Pull detached mounts fix from Christian Brauner:
 "Creating a series of detached mounts, attaching them to the
  filesystem, and unmounting them can be used to trigger an integer
  overflow in ns->mounts causing the kernel to block any new mounts in
  count_mounts() and returning ENOSPC because it falsely assumes that
  the maximum number of mounts in the mount namespace has been reached,
  i.e. it thinks it can't fit the new mounts into the mount namespace
  anymore.

  Without this fix heavy use of the new mount API with move_mount() will
  cause the host to become unuseable and thus blocks some xfstest
  patches I want to resend.

  Depending on the number of mounts in your system, this can be
  reproduced on any kernel that supportes open_tree() and move_mount().

  A reproducer has been sent for inclusion with xfstests. It takes care
  to do this in another mount namespace, not in the host's mount
  namespace so there shouldn't be any risk in running it but if one did
  run it on the host it would require a reboot in order to be able to
  mount again. See

      https://lore.kernel.org/fstests/20210309121041.753359-1-christian.brauner@ubuntu.com

  The root cause of this is that detached mounts aren't handled
  correctly when source and target mount are identical and reside on a
  shared mount causing a broken mount tree where the detached source
  itself is propagated which propagation prevents for regular
  bind-mounts and new mounts.

  This ultimately leads to a miscalculation of the number of mounts in
  the mount namespace.

  Detached mounts created via 'open_tree(fd, path, OPEN_TREE_CLONE)' are
  essentially like an unattached bind-mount. They can then later on be
  attached to the filesystem via move_mount() which calls into
  attach_recursive_mount().

  Part of attaching it to the filesystem is making sure that mounts get
  correctly propagated in case the destination mountpoint is MS_SHARED,
  i.e. is a shared mountpoint. This is done by calling into
  propagate_mnt() which walks the list of peers calling propagate_one()
  on each mount in this list making sure it receives the propagation
  event. The propagate_one() function thereby skips both new mounts and
  bind mounts to not propagate them "into themselves". Both are
  identified by checking whether the mount is already attached to any
  mount namespace in mnt->mnt_ns. The is what the IS_MNT_NEW() helper is
  responsible for.

  However, detached mounts have an anonymous mount namespace attached to
  them stashed in mnt->mnt_ns which means that IS_MNT_NEW() doesn't
  realize they need to be skipped causing the mount to propagate "into
  itself" breaking the mount table and causing a disconnect between the
  number of mounts recorded as being beneath or reachable from the
  target mountpoint and the number of mounts actually recorded/counted
  in ns->mounts ultimately causing an overflow which in turn prevents
  any new mounts via the ENOSPC issue.

  So teach propagation to handle detached mounts by making it aware of
  them. I've been tracking this issue down for the last couple of days
  and then verifying that the fix is correct by unmounting everything in
  my current mount table leaving only /proc and /sys mounted and running
  the reproducer above overnight verifying the number of mounts counted
  in ns->mounts. With this fix the counts are correct and the ENOSPC
  issue can't be reproduced.

  This change will only have an effect on mounts created with the new
  mount API since detached mounts cannot be created with the old mount
  API so regressions are extremely unlikely.

  Here's an illustration:

    #### mount():
    ubuntu@f1-vm:~$ sudo mount --bind /mnt/ /mnt/
    ubuntu@f1-vm:~$ findmnt  | grep -i mnt
    ├─/mnt                                /dev/sda2[/mnt] ext4       rw,relatime

    #### open_tree(OPEN_TREE_CLONE) + move_mount() with bug:
    ubuntu@f1-vm:~$ sudo ./mount-new /mnt/ /mnt/
    ubuntu@f1-vm:~$ findmnt  | grep -i mnt
    ├─/mnt                                /dev/sda2[/mnt] ext4       rw,relatime
    │ └─/mnt                              /dev/sda2[/mnt] ext4       rw,relatime

    #### open_tree(OPEN_TREE_CLONE) + move_mount() with the fix:
    ubuntu@f1-vm:~$ sudo ./mount-new /mnt /mnt
    ubuntu@f1-vm:~$ findmnt | grep -i mnt
    └─/mnt                                /dev/sda2[/mnt] ext4       rw,relatime"

* tag 'for-linus-2021-03-10' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  mount: fix mounting of detached mounts onto targets that reside on shared mounts

3 years agoMerge tag '5.12-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Wed, 10 Mar 2021 17:55:06 +0000 (09:55 -0800)]
Merge tag '5.12-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Six cifs/smb3 fixes, three of them for stable, including some
  important mulitchannel crediting fixes, and a fix for statfs error
  handling"

* tag '5.12-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: do not send close in compound create+close requests
  cifs: return proper error code in statfs(2)
  cifs: change noisy error message to FYI
  cifs: print MIDs in decimal notation
  cifs: ask for more credit on async read/write code paths
  cifs: fix credit accounting for extra channel

3 years agoxen/events: reset affinity of 2-level event when tearing it down
Juergen Gross [Sat, 6 Mar 2021 16:18:31 +0000 (17:18 +0100)]
xen/events: reset affinity of 2-level event when tearing it down

When creating a new event channel with 2-level events the affinity
needs to be reset initially in order to avoid using an old affinity
from earlier usage of the event channel port. So when tearing an event
channel down reset all affinity bits.

The same applies to the affinity when onlining a vcpu: all old
affinity settings for this vcpu must be reset. As percpu events get
initialized before the percpu event channel hook is called,
resetting of the affinities happens after offlining a vcpu (this is
working, as initial percpu memory is zeroed out).

Cc: stable@vger.kernel.org
Reported-by: Julien Grall <julien@xen.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Julien Grall <jgrall@amazon.com>
Link: https://lore.kernel.org/r/20210306161833.4552-2-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
3 years agoregulator: rt4831: Fix return value check in rt4831_regulator_probe()
Wei Yongjun [Fri, 5 Mar 2021 03:49:30 +0000 (03:49 +0000)]
regulator: rt4831: Fix return value check in rt4831_regulator_probe()

In case of error, the function dev_get_regmap() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value
check should be replaced with NULL test.

Fixes: 9351ab8b0cb6 ("regulator: rt4831: Adds support for Richtek RT4831 DSV regulator")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210305034930.3236099-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoregulator: pca9450: Clear PRESET_EN bit to fix BUCK1/2/3 voltage setting
Frieder Schrempf [Mon, 22 Feb 2021 11:52:20 +0000 (12:52 +0100)]
regulator: pca9450: Clear PRESET_EN bit to fix BUCK1/2/3 voltage setting

The driver uses the DVS registers PCA9450_REG_BUCKxOUT_DVS0 to set the
voltage for the buck regulators 1, 2 and 3. This has no effect as the
PRESET_EN bit is set by default and therefore the preset values are used
instead, which are set to 850 mV.

To fix this we clear the PRESET_EN bit at time of initialization.

Fixes: 0935ff5f1f0a ("regulator: pca9450: add pca9450 pmic driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20210222115229.166620-1-frieder.schrempf@kontron.de
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoregulator: qcom-rpmh: Use correct buck for S1C regulator
satya priya [Wed, 24 Feb 2021 08:33:11 +0000 (14:03 +0530)]
regulator: qcom-rpmh: Use correct buck for S1C regulator

Use correct buck, that is, pmic5_hfsmps515 for S1C regulator
of PM8350C PMIC.

Signed-off-by: satya priya <skakit@codeaurora.org>
Link: https://lore.kernel.org/r/1614155592-14060-7-git-send-email-skakit@codeaurora.org
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoregulator: qcom-rpmh: Correct the pmic5_hfsmps515 buck
satya priya [Wed, 24 Feb 2021 08:33:08 +0000 (14:03 +0530)]
regulator: qcom-rpmh: Correct the pmic5_hfsmps515 buck

Correct the REGULATOR_LINEAR_RANGE and n_voltges for
pmic5_hfsmps515 buck.

Signed-off-by: satya priya <skakit@codeaurora.org>
Link: https://lore.kernel.org/r/1614155592-14060-4-git-send-email-skakit@codeaurora.org
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoregulator: pca9450: Fix return value when failing to get sd-vsel GPIO
Frieder Schrempf [Mon, 22 Feb 2021 15:08:04 +0000 (16:08 +0100)]
regulator: pca9450: Fix return value when failing to get sd-vsel GPIO

This fixes the return value of pca9450_i2c_probe() to use the correct
error code when getting the sd-vsel GPIO fails.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20210222150809.208942-1-frieder.schrempf@kontron.de
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoregulator: mt6315: Return REGULATOR_MODE_INVALID for invalid mode
Axel Lin [Mon, 15 Feb 2021 03:48:13 +0000 (11:48 +0800)]
regulator: mt6315: Return REGULATOR_MODE_INVALID for invalid mode

-EINVAL is not a valid return value for .of_map_mode, return
REGULATOR_MODE_INVALID instead.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210215034813.45510-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
3 years agoALSA: hda/hdmi: Cancel pending works before suspend
Takashi Iwai [Wed, 10 Mar 2021 11:28:09 +0000 (12:28 +0100)]
ALSA: hda/hdmi: Cancel pending works before suspend

The per_pin->work might be still floating at the suspend, and this may
hit the access to the hardware at an unexpected timing.  Cancel the
work properly at the suspend callback for avoiding the buggy access.

Note that the bug doesn't trigger easily in the recent kernels since
the work is queued only when the repoll count is set, and usually it's
only at the resume callback, but it's still possible to hit in
theory.

BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1182377
Reported-and-tested-by: Abhishek Sahu <abhsahu@nvidia.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210310112809.9215-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
3 years agoALSA: hda: Avoid spurious unsol event handling during S3/S4
Takashi Iwai [Wed, 10 Mar 2021 11:28:08 +0000 (12:28 +0100)]
ALSA: hda: Avoid spurious unsol event handling during S3/S4

When HD-audio bus receives unsolicited events during its system
suspend/resume (S3 and S4) phase, the controller driver may still try
to process events although the codec chips are already (or yet)
powered down.  This might screw up the codec communication, resulting
in CORB/RIRB errors.  Such events should be rather skipped, as the
codec chip status such as the jack status will be fully refreshed at
the system resume time.

Since we're tracking the system suspend/resume state in codec
power.power_state field, let's add the check in the common unsol event
handler entry point to filter out such events.

BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1182377
Tested-by: Abhishek Sahu <abhsahu@nvidia.com>
Cc: <stable@vger.kernel.org> # 183ab39eb0ea: ALSA: hda: Initialize power_state
Link: https://lore.kernel.org/r/20210310112809.9215-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
3 years agoALSA: hda: Flush pending unsolicited events before suspend
Takashi Iwai [Wed, 10 Mar 2021 11:28:07 +0000 (12:28 +0100)]
ALSA: hda: Flush pending unsolicited events before suspend

The HD-audio controller driver processes the unsolicited events via
its work asynchronously, and this might be pending when the system
goes to suspend.  When a lengthy event handling like ELD byte reads is
running, this might trigger unexpected accesses among suspend/resume
procedure, typically seen with Nvidia driver that still requires the
handling via unsolicited event verbs for ELD updates.

This patch adds the flush of unsol_work to assure that pending events
are processed before going into suspend.

Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1182377
Reported-and-tested-by: Abhishek Sahu <abhsahu@nvidia.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210310112809.9215-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
3 years agoarm64: perf: Fix 64-bit event counter read truncation
Rob Herring [Wed, 10 Mar 2021 00:44:12 +0000 (17:44 -0700)]
arm64: perf: Fix 64-bit event counter read truncation

Commit 0fdf1bb75953 ("arm64: perf: Avoid PMXEV* indirection") changed
armv8pmu_read_evcntr() to return a u32 instead of u64. The result is
silent truncation of the event counter when using 64-bit counters. Given
the offending commit appears to have passed thru several folks, it seems
likely this was a bad rebase after v8.5 PMU 64-bit counters landed.

Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Julien Thierry <julien.thierry.kdev@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: <stable@vger.kernel.org>
Fixes: 0fdf1bb75953 ("arm64: perf: Avoid PMXEV* indirection")
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20210310004412.1450128-1-robh@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64/mm: Fix __enable_mmu() for new TGRAN range values
James Morse [Wed, 10 Mar 2021 05:53:10 +0000 (11:23 +0530)]
arm64/mm: Fix __enable_mmu() for new TGRAN range values

As per ARM ARM DDI 0487G.a, when FEAT_LPA2 is implemented, ID_AA64MMFR0_EL1
might contain a range of values to describe supported translation granules
(4K and 16K pages sizes in particular) instead of just enabled or disabled
values. This changes __enable_mmu() function to handle complete acceptable
range of values (depending on whether the field is signed or unsigned) now
represented with ID_AA64MMFR0_TGRAN_SUPPORTED_[MIN..MAX] pair. While here,
also fix similar situations in EFI stub and KVM as well.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-efi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/1615355590-21102-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
3 years agokselftest: arm64: Fix exit code of sve-ptrace
Mark Brown [Tue, 9 Mar 2021 19:03:04 +0000 (19:03 +0000)]
kselftest: arm64: Fix exit code of sve-ptrace

We track if sve-ptrace encountered a failure in a variable but don't
actually use that value when we exit the program, do so.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210309190304.39169-1-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64: mte: Map hotplugged memory as Normal Tagged
Catalin Marinas [Tue, 9 Mar 2021 12:26:01 +0000 (12:26 +0000)]
arm64: mte: Map hotplugged memory as Normal Tagged

In a system supporting MTE, the linear map must allow reading/writing
allocation tags by setting the memory type as Normal Tagged. Currently,
this is only handled for memory present at boot. Hotplugged memory uses
Normal non-Tagged memory.

Introduce pgprot_mhp() for hotplugged memory and use it in
add_memory_resource(). The arm64 code maps pgprot_mhp() to
pgprot_tagged().

Note that ZONE_DEVICE memory should not be mapped as Tagged and
therefore setting the memory type in arch_add_memory() is not feasible.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Fixes: 0178dc761368 ("arm64: mte: Use Normal Tagged attributes for the linear map")
Reported-by: Patrick Daly <pdaly@codeaurora.org>
Tested-by: Patrick Daly <pdaly@codeaurora.org>
Link: https://lore.kernel.org/r/1614745263-27827-1-git-send-email-pdaly@codeaurora.org
Cc: <stable@vger.kernel.org> # 5.10.x
Cc: Will Deacon <will@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20210309122601.5543-1-catalin.marinas@arm.com
Signed-off-by: Will Deacon <will@kernel.org>