Pull io_uring fixes form Jens Axboe:

 - Ensure ->result is always set when IO is retried (Bijan)

 - In conjunction with the above, fix a regression in polled IO issue
   when retried (me/Bijan)

 - Don't setup async context for read/write fixed, otherwise we may
   wrongly map the iovec on retry (me)

 - Cancel io-wq work if we fail getting mm reference (me)

 - Ensure dependent work is always initialized correctly (me)

 - Only allow original task to submit IO, don't allow it from a passed
   ring fd (me)

* tag 'io_uring-5.5-2020-01-16' of git://git.kernel.dk/linux-block:
  io_uring: only allow submit from owning task
  io_uring: ensure workqueue offload grabs ring mutex for poll list
  io_uring: clear req->result always before issuing a read/write request
  io_uring: be consistent in assigning next work from handler
  io-wq: cancel work if we fail getting a mm reference
  io_uring: don't setup async context for read/write fixed

Pull btrfs fixes from David Sterba:
 "A few more fixes that have been in the works during last twp weeks.
  All have a user visible effect and are stable material:

   - scrub: properly update progress after calling cancel ioctl, calling
     'resume' would start from the beginning otherwise

   - fix subvolume reference removal, after moving out of the original
     path the reference is not recognized and will lead to transaction
     abort

   - fix reloc root lifetime checks, could lead to crashes when there's
     subvolume cleaning running in parallel

   - fix memory leak when quotas get disabled in the middle of extent
     accounting

   - fix transaction abort in case of balance being started on degraded
     mount on eg. RAID1"

* tag 'for-5.5-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: check rw_devices, not num_devices for balance
  Btrfs: always copy scrub arguments back to user space
  btrfs: relocation: fix reloc_root lifespan and access
  btrfs: fix memory leak in qgroup accounting
  btrfs: do not delete mismatched root refs
  btrfs: fix invalid removal of root ref
  btrfs: rework arguments of btrfs_unlink_subvol

Pull fuse fix from Miklos Szeredi:
 "Fix a regression in the last release affecting the ftp module of the
  gvfs filesystem"

* tag 'fuse-fixes-5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix fuse_send_readpages() in the syncronous read case

Pull sound fixes from Takashi Iwai:
 "This became bigger than I have hoped for rc7. But, the only large LOC
  is for stm32 fixes that are simple rewriting of register access
  helpers, while the rest are all nice and small fixes:

   - A few ASoC fixes for the remaining probe error handling bugs

   - ALSA sequencer core fix for racy proc file accesses

   - Revert the option rename of snd-hda-intel to make compatible again

   - Various device-specific fixes"

* tag 'sound-5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: seq: Fix racy access for queue timer in proc read
  ALSA: usb-audio: fix sync-ep altsetting sanity check
  ASoC: msm8916-wcd-digital: Reset RX interpolation path after use
  ASoC: msm8916-wcd-analog: Fix MIC BIAS Internal1
  ASoC: cros_ec_codec: Make the device acpi compatible
  ASoC: sti: fix possible sleep-in-atomic
  ASoC: msm8916-wcd-analog: Fix selected events for MIC BIAS External1
  ASoC: hdac_hda: Fix error in driver removal after failed probe
  ASoC: SOF: Intel: fix HDA codec driver probe with multiple controllers
  ASoC: SOF: Intel: lower print level to dbg if we will reinit DSP
  ALSA: dice: fix fallback from protocol extension into limited functionality
  ALSA: firewire-tascam: fix corruption due to spin lock without restoration in SoftIRQ context
  ALSA: hda: Rename back to dmic_detect option
  ASoC: stm32: dfsdm: fix 16 bits record
  ASoC: stm32: sai: fix possible circular locking
  ASoC: Fix NULL dereference at freeing
  ASoC: Intel: bytcht_es8316: Fix Irbis NB41 netbook quirk
  ASoC: rt5640: Fix NULL dereference on module unload

The fstest btrfs/154 reports

  [ 8675.381709] BTRFS: Transaction aborted (error -28)
  [ 8675.383302] WARNING: CPU: 1 PID: 31900 at fs/btrfs/block-group.c:2038 btrfs_create_pending_block_groups+0x1e0/0x1f0 [btrfs]
  [ 8675.390925] CPU: 1 PID: 31900 Comm: btrfs Not tainted 5.5.0-rc6-default+ #935
  [ 8675.392780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba527-rebuilt.opensuse.org 04/01/2014
  [ 8675.395452] RIP: 0010:btrfs_create_pending_block_groups+0x1e0/0x1f0 [btrfs]
  [ 8675.402672] RSP: 0018:ffffb2090888fb00 EFLAGS: 00010286
  [ 8675.404413] RAX: 0000000000000000 RBX: ffff92026dfa91c8 RCX: 0000000000000001
  [ 8675.406609] RDX: 0000000000000000 RSI: ffffffff8e100899 RDI: ffffffff8e100971
  [ 8675.408775] RBP: ffff920247c61660 R08: 0000000000000000 R09: 0000000000000000
  [ 8675.410978] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffe4
  [ 8675.412647] R13: ffff92026db74000 R14: ffff920247c616b8 R15: ffff92026dfbc000
  [ 8675.413994] FS:  00007fd5e57248c0(0000) GS:ffff92027d800000(0000) knlGS:0000000000000000
  [ 8675.416146] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [ 8675.417833] CR2: 0000564aa51682d8 CR3: 000000006dcbc004 CR4: 0000000000160ee0
  [ 8675.419801] Call Trace:
  [ 8675.420742]  btrfs_start_dirty_block_groups+0x355/0x480 [btrfs]
  [ 8675.422600]  btrfs_commit_transaction+0xc8/0xaf0 [btrfs]
  [ 8675.424335]  reset_balance_state+0x14a/0x190 [btrfs]
  [ 8675.425824]  btrfs_balance.cold+0xe7/0x154 [btrfs]
  [ 8675.427313]  ? kmem_cache_alloc_trace+0x235/0x2c0
  [ 8675.428663]  btrfs_ioctl_balance+0x298/0x350 [btrfs]
  [ 8675.430285]  btrfs_ioctl+0x466/0x2550 [btrfs]
  [ 8675.431788]  ? mem_cgroup_charge_statistics+0x51/0xf0
  [ 8675.433487]  ? mem_cgroup_commit_charge+0x56/0x400
  [ 8675.435122]  ? do_raw_spin_unlock+0x4b/0xc0
  [ 8675.436618]  ? _raw_spin_unlock+0x1f/0x30
  [ 8675.438093]  ? __handle_mm_fault+0x499/0x740
  [ 8675.439619]  ? do_vfs_ioctl+0x56e/0x770
  [ 8675.441034]  do_vfs_ioctl+0x56e/0x770
  [ 8675.442411]  ksys_ioctl+0x3a/0x70
  [ 8675.443718]  ? trace_hardirqs_off_thunk+0x1a/0x1c
  [ 8675.445333]  __x64_sys_ioctl+0x16/0x20
  [ 8675.446705]  do_syscall_64+0x50/0x210
  [ 8675.448059]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
  [ 8675.479187] BTRFS: error (device vdb) in btrfs_create_pending_block_groups:2038: errno=-28 No space left

We now use btrfs_can_overcommit() to see if we can flip a block group
read only.  Before this would fail because we weren't taking into
account the usable un-allocated space for allocating chunks.  With my
patches we were allowed to do the balance, which is technically correct.

The test is trying to start balance on degraded mount.  So now we're
trying to allocate a chunk and cannot because we want to allocate a
RAID1 chunk, but there's only 1 device that's available for usage.  This
results in an ENOSPC.

But we shouldn't even be making it this far, we don't have enough
devices to restripe.  The problem is we're using btrfs_num_devices(),
that also includes missing devices. That's not actually what we want, we
need to use rw_devices.

The chunk_mutex is not needed here, rw_devices changes only in device
add, remove or replace, all are excluded by EXCL_OP mechanism.

Fixes: e4d8ec0f ("Btrfs: implement online profile changing")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add stacktrace, update changelog, drop chunk_mutex ]
Signed-off-by: David Sterba <dsterba@suse.com>

If scrub returns an error we are not copying back the scrub arguments
structure to user space. This prevents user space to know how much
progress scrub has done if an error happened - this includes -ECANCELED
which is returned when users ask for scrub to stop. A particular use
case, which is used in btrfs-progs, is to resume scrub after it is
canceled, in that case it relies on checking the progress from the scrub
arguments structure and then use that progress in a call to resume
scrub.

So fix this by always copying the scrub arguments structure to user
space, overwriting the value returned to user space with -EFAULT only if
copying the structure failed to let user space know that either that
copying did not happen, and therefore the structure is stale, or it
happened partially and the structure is probably not valid and corrupt
due to the partial copy.
Reported-by: Graham Cobb <g.btrfs@cobb.uk.net>
Link: https://lore.kernel.org/linux-btrfs/d0a97688-78be-08de-ca7d-bcb4c7fb397e@cobb.uk.net/
Fixes: 06fe39ab ("Btrfs: do not overwrite scrub error with fault error in scrub ioctl")
CC: stable@vger.kernel.org # 5.1+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Tested-by: Graham Cobb <g.btrfs@cobb.uk.net>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Pull GPIO fixes from Linus Walleij:
 "This reverts the GPIOLIB_IRQCHIP in the ThunderX driver.

  ThunderX is a piece of Arm-based server chip. I converted the driver
  to hierarchical gpiochip without access to real silicon and failed
  miserably since I didn't take MSI's into account.

  Kevin Hao helpfully stepped in and fixed it properly, let's revert it
  for v5.5 and put the proper conversion into v5.6"

* tag 'gpio-v5.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  Revert "gpio: thunderx: Switch to GPIOLIB_IRQCHIP"

Pull block fixes from Jens Axboe:
 "Three fixes that should go into this release:

   - The 32-bit segment size fix that I mentioned last week (Ming)

   - Use uint for the block size (Mikulas)

   - A null_blk zone write handling fix (Damien)"

* tag 'block-5.5-2020-01-16' of git://git.kernel.dk/linux-block:
  block: fix an integer overflow in logical block size
  null_blk: Fix zone write handling
  block: fix get_max_segment_size() overflow on 32bit arch

If the credentials or the mm doesn't match, don't allow the task to
submit anything on behalf of this ring. The task that owns the ring can
pass the file descriptor to another task, but we don't want to allow
that task to submit an SQE that then assumes the ring mm and creds if
it needs to go async.

Cc: stable@vger.kernel.org
Suggested-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Pull ARM SoC fixes from Olof Johansson:
 "I've been sitting on these longer than I meant, so the patch count is
  a bit higher than ideal for this part of the release. There's also
  some reverts of double-applied patches that brings the diffstat up a
  bit.

  With that said, the biggest changes are:

   - Revert of duplicate i2c device addition on two Aspeed (BMC)
     Devicetrees.

   - Move of two device nodes that got applied to the wrong part of the
     tree on ASpeed G6.

   - Regulator fix for Beaglebone X15 (adding 12/5V supplies)

   - Use interrupts for keys on Amlogic SM1 to avoid missed polls

  In addition to that, there is a collection of smaller DT fixes:

   - Power supply assignment fixes for i.MX6

   - Fix of interrupt line for magnetometer on i.MX8 Librem5 devkit

   - Build fixlets (selects) for davinci/omap2+

   - More interrupt number fixes for Stratix10, Amlogic SM1, etc.

   - ... and more similar fixes across different platforms

  And some non-DT stuff:

   - optee fix to register multiple shared pages properly

   - Clock calculation fixes for MMP3

   - Clock fixes for OMAP as well"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (42 commits)
  MAINTAINERS: Add myself as the co-maintainer for Actions Semi platforms
  ARM: dts: imx7: Fix Toradex Colibri iMX7S 256MB NAND flash support
  ARM: dts: imx6sll-evk: Remove incorrect power supply assignment
  ARM: dts: imx6sl-evk: Remove incorrect power supply assignment
  ARM: dts: imx6sx-sdb: Remove incorrect power supply assignment
  ARM: dts: imx6qdl-sabresd: Remove incorrect power supply assignment
  ARM: dts: imx6q-icore-mipi: Use 1.5 version of i.Core MX6DL
  ARM: omap2plus: select RESET_CONTROLLER
  ARM: davinci: select CONFIG_RESET_CONTROLLER
  ARM: dts: aspeed: rainier: Fix fan fault and presence
  ARM: dts: aspeed: rainier: Remove duplicate i2c busses
  ARM: dts: aspeed: tacoma: Remove duplicate flash nodes
  ARM: dts: aspeed: tacoma: Remove duplicate i2c busses
  ARM: dts: aspeed: tacoma: Fix fsi master node
  ARM: dts: aspeed-g6: Fix FSI master location
  ARM: dts: mmp3: Fix the TWSI ranges
  clk: mmp2: Fix the order of timer mux parents
  ARM: mmp: do not divide the clock rate
  arm64: dts: rockchip: Fix IR on Beelink A1
  optee: Fix multi page dynamic shm pool alloc
  ...

Pull clk fixes from Stephen Boyd:
 "Second collection of clk fixes for the next release.

  This one includes a fix for PM on TI SoCs with sysc devices and fixes
  a bunch of clks that are stuck always enabled on Qualcomm SDM845 SoCs.

  Allwinner SoCs get the usual set of fixes too, mostly correcting
  drivers to have the right bits that match the hardware.

  There's also a Samsung and Tegra fix in here to mark a clk critical
  and avoid a double free.

  And finally there's a fix for critical clks that silences a big
  warning splat about trying to enable a clk that couldn't even be
  prepared"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: ti: dra7-atl: Remove pm_runtime_irq_safe()
  clk: qcom: gcc-sdm845: Add missing flag to votable GDSCs
  clk: sunxi-ng: h6-r: Fix AR100/R_APB2 parent order
  clk: sunxi-ng: h6-r: Simplify R_APB1 clock definition
  clk: sunxi-ng: sun8i-r: Fix divider on APB0 clock
  clk: Don't try to enable critical clocks if prepare failed
  clk: tegra: Fix double-free in tegra_clk_init()
  clk: samsung: exynos5420: Keep top G3D clocks enabled
  clk: sunxi-ng: r40: Allow setting parent rate for external clock outputs
  clk: sunxi-ng: v3s: Fix incorrect number of hw_clks.

Pull power management fix from Rafael Wysocki:
 "Fix a coding mistake in the teo cpuidle governor causing data to be
  written beyond the last array element (Ikjoon Jang)"

* tag 'pm-5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpuidle: teo: Fix intervals[] array indexing bug

Since I've been doing the maintainership work for couple of cycles, we've
decided to add myself as the co-maintainer along with Andreas.

Link: https://lore.kernel.org/r/20200114084348.25659-2-manivannan.sadhasivam@linaro.org
Cc: "Andreas Färber" <afaerber@suse.de>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tag-chrome-platform-fixes-for-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux

Pull chrome platform fix from Benson Leung:
 "One fix in the wilco_ec keyboard backlight driver to allow the EC
  driver to continue loading in the absence of a backlight module"

* tag 'tag-chrome-platform-fixes-for-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
  platform/chrome: wilco_ec: Fix keyboard backlight probing

Merge tag 'asoc-fix-v5.5-rc6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.5

This is mostly driver specific fixes, plus an error handling fix
in the core.  There is a rather large diffstat for the stm32 SAI
driver, this is a very large but mostly mechanical update which
wraps every register access in the driver to allow a fix to the
locking which avoids circular locks, the active change is much
smaller and more reasonably sized.

Buffered read in fuse normally goes via:

 -> generic_file_buffered_read()
   -> fuse_readpages()
     -> fuse_send_readpages()
       ->fuse_simple_request() [called since v5.4]

In the case of a read request, fuse_simple_request() will return a
non-negative bytecount on success or a negative error value.  A positive
bytecount was taken to be an error and the PG_error flag set on the page.
This resulted in generic_file_buffered_read() falling back to ->readpage(),
which would repeat the read request and succeed.  Because of the repeated
read succeeding the bug was not detected with regression tests or other use
cases.

The FTP module in GVFS however fails the second read due to the
non-seekable nature of FTP downloads.

Fix by checking and ignoring positive return value from
fuse_simple_request().
Reported-by: Ondrej Holy <oholy@redhat.com>
Link: https://gitlab.gnome.org/GNOME/gvfs/issues/441
Fixes: 134831e3 ("fuse: convert readpages to simple api")
Cc: <stable@vger.kernel.org> # v5.4
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

A previous commit moved the locking for the async sqthread, but didn't
take into account that the io-wq workers still need it. We can't use
req->in_async for this anymore as both the sqthread and io-wq workers
set it, gate the need for locking on io_wq_current_is_worker() instead.

Fixes: 8a4955ff ("io_uring: sqthread should grab ctx->uring_lock for submissions")
Reported-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Logical block size has type unsigned short. That means that it can be at
most 32768. However, there are architectures that can run with 64k pages
(for example arm64) and on these architectures, it may be possible to
create block devices with 64k block size.

For exmaple (run this on an architecture with 64k pages):

Mount will fail with this error because it tries to read the superblock using 2-sector
access:
  device-mapper: writecache: I/O is not aligned, sector 2, size 1024, block size 65536
  EXT4-fs (dm-0): unable to read superblock

This patch changes the logical block size from unsigned short to unsigned
int to avoid the overflow.

Cc: stable@vger.kernel.org
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

req->result is cleared when io_issue_sqe() calls io_read/write_pre()
routines.  Those routines however are not called when the sqe
argument is NULL, which is the case when io_issue_sqe() is called from
io_wq_submit_work().  io_issue_sqe() may then examine a stale result if
a polled request had previously failed with -EAGAIN:

        if (ctx->flags & IORING_SETUP_IOPOLL) {
                if (req->result == -EAGAIN)
                        return -EAGAIN;

                io_iopoll_req_issued(req);
        }

and in turn cause a subsequently completed request to be re-issued in
io_wq_submit_work().
Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

snd_seq_info_timer_read() reads the information of the timer assigned
for each queue, but it's done in a racy way which may lead to UAF as
spotted by syzkaller.

This patch applies the missing q->timer_mutex lock while accessing the
timer object as well as a slight code change to adapt the standard
coding style.

Reported-by: syzbot+2b2ef983f973e5c40943@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200115203733.26530-1-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

Intel Software Developer's Manual, volume 3, chapter 9.11.6 says:

 "Note that the microcode update must be aligned on a 16-byte boundary
  and the size of the microcode update must be 1-KByte granular"

When early-load Intel microcode is loaded from initramfs, userspace tool
'iucode_tool' has already 16-byte aligned those microcode bits in that
initramfs image.  Image that was created something like this:

 iucode_tool --write-earlyfw=FOO.cpio microcode-files...

However, when early-load Intel microcode is loaded from built-in
firmware BLOB using CONFIG_EXTRA_FIRMWARE= kernel config option, that
16-byte alignment is not guaranteed.

Fix this by forcing all built-in firmware BLOBs to 16-byte alignment.

[ If we end up having other firmware with much bigger alignment
  requirements, we might need to introduce some method for the firmware
  to specify it, this is the minimal "just increase the alignment a bit
  to account for this one special case" patch    - Linus ]
Signed-off-by: Jari Ruusu <jari.ruusu@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull arch/nios2 fixlet from Ley Foon Tan:
 "Update my nios2 maintainer email"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
  MAINTAINERS: Update Ley Foon Tan's email address

Pull x86 platform driver fixes from Andy Shevchenko:

 - Fix keyboard brightness control for ASUS laptops

 - Better handling parameters of GPD pocket fan module to avoid
   thermal shock

 - Add IDs to PMC platform driver to support Intel Comet Lake

 - Fix potential dead lock in Mellanox TM FIFO driver and ABI
   documentation

* tag 'platform-drivers-x86-v5.5-3' of git://git.infradead.org/linux-platform-drivers-x86:
  Documentation/ABI: Add missed attribute for mlxreg-io sysfs interfaces
  Documentation/ABI: Fix documentation inconsistency for mlxreg-io sysfs interfaces
  platform/x86: asus-wmi: Fix keyboard brightness cannot be set to 0
  platform/x86: intel_pmc_core: update Comet Lake platform driver
  platform/x86: GPD pocket fan: Allow somewhat lower/higher temperature limits
  platform/x86: GPD pocket fan: Use default values when wrong modparams are given
  platform/mellanox: fix potential deadlock in the tmfifo driver
  platform/x86: intel-ips: Use the correct style for SPDX License Identifier

Pull crypto fix from Herbert Xu:
 "This fixes a build problem for the hisilicon driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: hisilicon/sec2 - Use atomics instead of __sync

Pull vfs fixes from Al Viro:
 "Fixes for mountpoint_last() bugs (by converting to use of
  lookup_last()) and an autofs regression fix from this cycle (caused by
  follow_managed() breakage introduced in barrier fixes series)"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix autofs regression caused by follow_managed() changes
  reimplement path_mountpoint() with less magic

null_zone_write() only allows writing empty and implicitly opened zones.
Writing to closed and explicitly opened zones must also be allowed and
the zone condition must be transitioned to implicit open if the zone
is not explicitly opened already.

Fixes: da644b2c ("null_blk: add zone open, close, and finish support")
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

This reverts commit a7fc89f9 because
there are some bugs in this commit, and we don't have a simple way to
fix these bugs. So revert this commit to make the thunderx gpio work
on the stable kernel at least. We will switch to GPIOLIB_IRQCHIP
for thunderx gpio by following patches.

Fixes: a7fc89f9 ("gpio: thunderx: Switch to GPIOLIB_IRQCHIP")
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Link: https://lore.kernel.org/r/20200114082821.14015-2-haokexin@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

we need to reload ->d_flags after the call of ->d_manage() - the thing
might've been called with dentry still negative and have the damn thing
turned positive while we'd waited.

Fixes: d41efb52 "fs/namei.c: pull positivity check into follow_managed()"
Reported-by: Ian Kent <raven@themaw.net>
Tested-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

... and get rid of a bunch of bugs in it.  Background:
the reason for path_mountpoint() is that umount() really doesn't
want attempts to revalidate the root of what it's trying to umount.
The thing we want to avoid actually happen from complete_walk();
solution was to do something parallel to normal path_lookupat()
and it both went overboard and got the boilerplate subtly
(and not so subtly) wrong.

A better solution is to do pretty much what the normal path_lookupat()
does, but instead of complete_walk() do unlazy_walk().  All it takes
to avoid that ->d_weak_revalidate() call...  mountpoint_last() goes
away, along with everything it got wrong, and so does the magic around
LOOKUP_NO_REVAL.

Another source of bugs is that when we traverse mounts at the final
location (and we need to do that - umount . expects to get whatever's
overmounting ., if any, out of the lookup) we really ought to take
care of ->d_manage() - as it is, manual umount of autofs automount
in progress can lead to unpleasant surprises for the daemon.  Easily
solved by using handle_lookup_down() instead of follow_mount().
Tested-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

If we pass back dependent work in case of links, we need to always
ensure that we call the link setup and work prep handler. If not, we
might be missing some setup for the next work item.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

If we require mm and user context, mark the request for cancellation
if we fail to acquire the desired mm.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

@altera.com email is going to removed. Change to @intel.com email.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>

Pull NFS client bugfixes from Anna Schumaker:
 "Three NFS over RDMA fixes for bugs Chuck found that can be hit during
  device removal:

   - Fix create_qp crash on device unload

   - Fix completion wait during device removal

   - Fix oops in receive handler after device removal"

* tag 'nfs-for-5.5-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  xprtrdma: Fix oops in Receive handler after device removal
  xprtrdma: Fix completion wait during device removal
  xprtrdma: Fix create_qp crash on device unload

Commit 429120f3 starts to take account of segment's start dma address
when computing max segment size, and data type of 'unsigned long'
is used to do that. However, the segment mask may be 0xffffffff, so
the figured out segment size may be overflowed in case of zero physical
address on 32bit arch.

Fix the issue by returning queue_max_segment_size() directly when that
happens.

Fixes: 429120f3 ("block: fix splitting segments on boundary masks")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Christoph Hellwig <hch@lst.de>
Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Since v5.4, a device removal occasionally triggered this oops:

Dec  2 17:13:53 manet kernel: BUG: unable to handle page fault for address: 0000000c00000219
Dec  2 17:13:53 manet kernel: #PF: supervisor read access in kernel mode
Dec  2 17:13:53 manet kernel: #PF: error_code(0x0000) - not-present page
Dec  2 17:13:53 manet kernel: PGD 0 P4D 0
Dec  2 17:13:53 manet kernel: Oops: 0000 [#1] SMP
Dec  2 17:13:53 manet kernel: CPU: 2 PID: 468 Comm: kworker/2:1H Tainted: G        W         5.4.0-00050-g53717e43af61 #883
Dec  2 17:13:53 manet kernel: Hardware name: Supermicro SYS-6028R-T/X10DRi, BIOS 1.1a 10/16/2015
Dec  2 17:13:53 manet kernel: Workqueue: ib-comp-wq ib_cq_poll_work [ib_core]
Dec  2 17:13:53 manet kernel: RIP: 0010:rpcrdma_wc_receive+0x7c/0xf6 [rpcrdma]
Dec  2 17:13:53 manet kernel: Code: 6d 8b 43 14 89 c1 89 45 78 48 89 4d 40 8b 43 2c 89 45 14 8b 43 20 89 45 18 48 8b 45 20 8b 53 14 48 8b 30 48 8b 40 10 48 8b 38 <48> 8b 87 18 02 00 00 48 85 c0 75 18 48 8b 05 1e 24 c4 e1 48 85 c0
Dec  2 17:13:53 manet kernel: RSP: 0018:ffffc900035dfe00 EFLAGS: 00010246
Dec  2 17:13:53 manet kernel: RAX: ffff888467290000 RBX: ffff88846c638400 RCX: 0000000000000048
Dec  2 17:13:53 manet kernel: RDX: 0000000000000048 RSI: 00000000f942e000 RDI: 0000000c00000001
Dec  2 17:13:53 manet kernel: RBP: ffff888467611b00 R08: ffff888464e4a3c4 R09: 0000000000000000
Dec  2 17:13:53 manet kernel: R10: ffffc900035dfc88 R11: fefefefefefefeff R12: ffff888865af4428
Dec  2 17:13:53 manet kernel: R13: ffff888466023000 R14: ffff88846c63f000 R15: 0000000000000010
Dec  2 17:13:53 manet kernel: FS:  0000000000000000(0000) GS:ffff88846fa80000(0000) knlGS:0000000000000000
Dec  2 17:13:53 manet kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Dec  2 17:13:53 manet kernel: CR2: 0000000c00000219 CR3: 0000000002009002 CR4: 00000000001606e0
Dec  2 17:13:53 manet kernel: Call Trace:
Dec  2 17:13:53 manet kernel: __ib_process_cq+0x5c/0x14e [ib_core]
Dec  2 17:13:53 manet kernel: ib_cq_poll_work+0x26/0x70 [ib_core]
Dec  2 17:13:53 manet kernel: process_one_work+0x19d/0x2cd
Dec  2 17:13:53 manet kernel: ? cancel_delayed_work_sync+0xf/0xf
Dec  2 17:13:53 manet kernel: worker_thread+0x1a6/0x25a
Dec  2 17:13:53 manet kernel: ? cancel_delayed_work_sync+0xf/0xf
Dec  2 17:13:53 manet kernel: kthread+0xf4/0xf9
Dec  2 17:13:53 manet kernel: ? kthread_queue_delayed_work+0x74/0x74
Dec  2 17:13:53 manet kernel: ret_from_fork+0x24/0x30

The proximal cause is that this rpcrdma_rep has a rr_rdmabuf that
is still pointing to the old ib_device, which has been freed. The
only way that is possible is if this rpcrdma_rep was not destroyed
by rpcrdma_ia_remove.

Debugging showed that was indeed the case: this rpcrdma_rep was
still in use by a completing RPC at the time of the device removal,
and thus wasn't on the rep free list. So, it was not found by
rpcrdma_reps_destroy().

The fix is to introduce a list of all rpcrdma_reps so that they all
can be found when a device is removed. That list is used to perform
only regbuf DMA unmapping, replacing that call to
rpcrdma_reps_destroy().

Meanwhile, to prevent corruption of this list, I've moved the
destruction of temp rpcrdma_rep objects to rpcrdma_post_recvs().
rpcrdma_xprt_drain() ensures that post_recvs (and thus rep_destroy) is
not invoked while rpcrdma_reps_unmap is walking rb_all_reps, thus
protecting the rb_all_reps list.

Fixes: b0b227f0 ("xprtrdma: Use an llist to manage free rpcrdma_reps")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

I've found that on occasion, "rmmod <dev>" will hang while if an NFS
is under load.

Ensure that ri_remove_done is initialized only just before the
transport is woken up to force a close. This avoids the completion
possibly getting initialized again while the CM event handler is
waiting for a wake-up.

Fixes: bebd0318 ("xprtrdma: Support unplugging an HCA from under an NFS mount")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

On device re-insertion, the RDMA device driver crashes trying to set
up a new QP:

Nov 27 16:32:06 manet kernel: BUG: kernel NULL pointer dereference, address: 00000000000001c0
Nov 27 16:32:06 manet kernel: #PF: supervisor write access in kernel mode
Nov 27 16:32:06 manet kernel: #PF: error_code(0x0002) - not-present page
Nov 27 16:32:06 manet kernel: PGD 0 P4D 0
Nov 27 16:32:06 manet kernel: Oops: 0002 [#1] SMP
Nov 27 16:32:06 manet kernel: CPU: 1 PID: 345 Comm: kworker/u28:0 Tainted: G        W         5.4.0 #852
Nov 27 16:32:06 manet kernel: Hardware name: Supermicro SYS-6028R-T/X10DRi, BIOS 1.1a 10/16/2015
Nov 27 16:32:06 manet kernel: Workqueue: xprtiod xprt_rdma_connect_worker [rpcrdma]
Nov 27 16:32:06 manet kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12
Nov 27 16:32:06 manet kernel: Code: ff ff 48 8b 04 24 5a c3 c6 07 00 0f 1f 40 00 c3 31 c0 48 81 ff 08 09 68 81 72 0c 31 c0 48 81 ff 83 0c 68 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 0f 94 c2 84 d2 75 02 89 06 88 d0 c3 53 ba 01 00 00 00
Nov 27 16:32:06 manet kernel: RSP: 0018:ffffc900035abbf0 EFLAGS: 00010046
Nov 27 16:32:06 manet kernel: RAX: 0000000000000000 RBX: 00000000000001c0 RCX: 0000000000000000
Nov 27 16:32:06 manet kernel: RDX: 0000000000000001 RSI: ffffc900035abbfc RDI: 00000000000001c0
Nov 27 16:32:06 manet kernel: RBP: ffffc900035abde0 R08: 000000000000000e R09: ffffffffffffc000
Nov 27 16:32:06 manet kernel: R10: 0000000000000000 R11: 000000000002e800 R12: ffff88886169d9f8
Nov 27 16:32:06 manet kernel: R13: ffff88886169d9f4 R14: 0000000000000246 R15: 0000000000000000
Nov 27 16:32:06 manet kernel: FS:  0000000000000000(0000) GS:ffff88846fa40000(0000) knlGS:0000000000000000
Nov 27 16:32:06 manet kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 27 16:32:06 manet kernel: CR2: 00000000000001c0 CR3: 0000000002009006 CR4: 00000000001606e0
Nov 27 16:32:06 manet kernel: Call Trace:
Nov 27 16:32:06 manet kernel: do_raw_spin_lock+0x2f/0x5a
Nov 27 16:32:06 manet kernel: create_qp_common.isra.47+0x856/0xadf [mlx4_ib]
Nov 27 16:32:06 manet kernel: ? slab_post_alloc_hook.isra.60+0xa/0x1a
Nov 27 16:32:06 manet kernel: ? __kmalloc+0x125/0x139
Nov 27 16:32:06 manet kernel: mlx4_ib_create_qp+0x57f/0x972 [mlx4_ib]

The fix is to copy the qp_init_attr struct that was just created by
rpcrdma_ep_create() instead of using the one from the previous
connection instance.

Fixes: 98ef77d1 ("xprtrdma: Send Queue size grows after a reconnect")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

Pull parisc fixes from Helge Deller:
 "A boot crash fix by Mike Rapoport and a printk fix by Krzysztof
  Kozlowski"

* 'parisc-5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix map_pages() to actually populate upper directory
  parisc: Use proper printk format for resource_size_t

Pull asm-generic fixes from Arnd Bergmann:
 "Here are two bugfixes from Mike Rapoport, both fixing compile-time
  errors for the nds32 architecture that were recently introduced"

* tag 'asm-generic-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
  nds32: fix build failure caused by page table folding updates
  asm-generic/nds32: don't redefine cacheflush primitives

Pull SCSI fixes from James Bottomley:
 "Two simple fixes in the upper drivers (so both fairly core), one in
  enclosures, which fixes replugging a device into an enclosure slot and
  one in the disk driver which fixes revalidating a drive with
  protection information (PI) to make it a non-PI drive ... previously
  we were still remembering the old PI state.

  Both fixed issues are quite rare in the field"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: enclosure: Fix stale device oops with hot replug
  scsi: sd: Clear sdkp->protection_type if disk is reformatted without PI