Merge tag 'ovl-fixes-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into master

Pull overlayfs fixes from Miklos Szeredi:

 - fix a regression introduced in v4.20 in handling a regenerated
   squashfs lower layer

 - two regression fixes for this cycle, one of which is Oops inducing

 - miscellaneous issues

* tag 'ovl-fixes-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: fix lookup of indexed hardlinks with metacopy
  ovl: fix unneeded call to ovl_change_flags()
  ovl: fix mount option checks for nfs_export with no upperdir
  ovl: force read-only sb on failure to create index dir
  ovl: fix regression with re-formatted lower squashfs
  ovl: fix oops in ovl_indexdir_cleanup() with nfs_export=on
  ovl: relax WARN_ON() when decoding lower directory file handle
  ovl: remove not used argument in ovl_check_origin
  ovl: change ovl_copy_up_flags static
  ovl: inode reference leak in ovl_is_inuse true case.

Merge tag 'spi-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into master

Pull spi fixes from Mark Brown:
 "A couple of small driver specific fixes for fairly minor issues"

* tag 'spi-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-sun6i: sun6i_spi_transfer_one(): fix setting of clock rate
  spi: mediatek: use correct SPI_CFG2_REG MACRO

Merge tag 'regulator-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into master

Pull regulator fixes from Mark Brown:
 "The more substantial fix here is the rename of the da903x driver which
  fixes a collision with the parent MFD driver name which caused issues
  when things were built as modules.

  There's also a fix for a mislableled regulator on the pmi8994 which is
  quite important for systems with that device"

* tag 'regulator-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  MAINTAINERS: remove obsolete entry after file renaming
  regulator: rename da903x to da903x-regulator
  regulator: qcom_smd: Fix pmi8994 label

Merge tag 'regmap-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into master

Pull regmap fixes from Mark Brown:
 "A couple of substantial fixes here, one from Doug which fixes the
  debugfs code for MMIO regmaps (fortunately not the common case) and
  one from Marc fixing lookups of multiple regmaps for the same device
  (a very unusual case).

  There's also a fix for Kconfig to ensure we enable SoundWire properly"

* tag 'regmap-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: debugfs: Don't sleep while atomic for fast_io regmaps
  regmap: add missing dependency on SoundWire
  regmap: dev_get_regmap_match(): fix string comparison

Pull HID fixes from Jiri Kosina:

 - linked list race condition fix in hid-steam driver from Rodrigo Rivas
   Costa

 - assorted deviceID-specific quirks and other small cosmetic cleanups

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: logitech-hidpp: avoid repeated "multiplier = " log messages
  HID: logitech: Use HIDPP_RECEIVER_INDEX instead of 0xff
  HID: quirks: Ignore Simply Automated UPB PIM
  HID: apple: Disable Fn-key key-re-mapping on clone keyboards
  MAINTAINERS: update uhid and hid-wiimote entry
  HID: steam: fixes race in handling device list.
  HID: magicmouse: do not set up autorepeat
  HID: alps: support devices with report id 2
  HID: quirks: Always poll Obins Anne Pro 2 keyboard
  HID: i2c-hid: add Mediacom FlexBook edge13 to descriptor override

Pull sound fixes from Takashi Iwai:
 "No surprise here, just a few device-specific small fixes: two fixes
  for USB LINE6 and one for USB-audio drivers wrt syzkaller fuzzer
  issues, while the rest are all HD-audio Realtek quirks"

* tag 'sound-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - fixup for yet another Intel reference board
  ALSA: hda/realtek - Enable Speaker for ASUS UX563
  ALSA: hda/realtek - Enable Speaker for ASUS UX533 and UX534
  ALSA: hda/realtek: Enable headset mic of Acer TravelMate B311R-31 with ALC256
  ALSA: hda/realtek: enable headset mic of ASUS ROG Zephyrus G14(G401) series with ALC289
  ALSA: hda/realtek - change to suitable link model for ASUS platform
  ALSA: usb-audio: Fix race against the error recovery URB submission
  ALSA: line6: Sync the pending work cancel at disconnection
  ALSA: line6: Perform sanity check for each URB creation

Pull drm fixes from Dave Airlie:
 "Weekly fixes pull, big bigger than I'd normally like, but they are
  fairly scattered and small individually.

  The vmwgfx one is a black screen regression, otherwise the largest is
  an MST encoder fix for amdgpu which results in a WARN in some cases,
  and a scattering of i915 fixes.

  I'm tracking two regressions at the moment that hopefully we get
  nailed down this week for rc7.

  dma-buf:
   - sleeping atomic fix

  amdgpu:
   - Fix a race condition with KIQ
   - Preemption fix
   - Fix handling of fake MST encoders
   - OLED panel fix
   - Handle allocation failure in stream construction
   - Renoir SMC fix
   - SDMA 5.x fix

  i915:
   - FBC w/a stride fix
   - Fix use-after-free fix on module reload
   - Ignore irq enabling on the virtual engines to fix device sleep
   - Use GTT when saving/restoring engine GPR
   - Fix selftest sort function

  vmwgfx:
   - black screen fix

  aspeed:
   - fbcon init warn fix"

* tag 'drm-fixes-2020-07-17-1' of git://anongit.freedesktop.org/drm/drm:
  drm/amdgpu/sdma5: fix wptr overwritten in ->get_wptr()
  drm/amdgpu/powerplay: Modify SMC message name for setting power profile mode
  drm/amd/display: handle failed allocation during stream construction
  drm/amd/display: OLED panel backlight adjust not work with external display connected
  drm/amdgpu/display: create fake mst encoders ahead of time (v4)
  drm/amdgpu: fix preemption unit test
  drm/amdgpu/gfx10: fix race condition for kiq
  drm/i915: Recalculate FBC w/a stride when needed
  drm/i915: Move cec_notifier to intel_hdmi_connector_unregister, v2.
  drm/i915/gt: Only swap to a random sibling once upon creation
  drm/i915/gt: Ignore irq enabling on the virtual engines
  drm/i915/perf: Use GTT when saving/restoring engine GPR
  drm/i915/selftests: Fix compare functions provided for sorting
  drm/vmwgfx: fix update of display surface when resolution changes
  dmabuf: use spinlock to access dmabuf->name
  drm/aspeed: Call drm_fbdev_generic_setup after drm_dev_register

Merge tag 'amd-drm-fixes-5.8-2020-07-15' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amd-drm-fixes-5.8-2020-07-15:

amdgpu:
- Fix a race condition with KIQ
- Preemption fix
- Fix handling of fake MST encoders
- OLED panel fix
- Handle allocation failure in stream construction
- Renoir SMC fix
- SDMA 5.x fix
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715213914.3994-1-alexander.deucher@amd.com

If a regmap has "fast_io" set then its lock function uses a spinlock.
That doesn't work so well with the functions:
* regmap_cache_only_write_file()
* regmap_cache_bypass_write_file()

Both of the above functions have the pattern:
1. Lock the regmap.
2. Call:
   debugfs_write_file_bool()
     copy_from_user()
       __might_fault()
         __might_sleep()

Let's reorder things a bit so that we do all of our sleepable
functions before we grab the lock.

Fixes: d3dc5430 ("regmap: debugfs: Allow writes to cache state settings")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200715164611.1.I35b3533e8a80efde0cec1cc70f71e1e74b2fa0da@changeidSigned-off-by: Mark Brown <broonie@kernel.org>

Pull power management fixes from Rafael Wysocki:
 "Add missing handling of a command line switch to the intel_pstate
  driver (Rafael Wysocki) and fix the freeing of the operating
  performance point (OPP) entries for the legacy (v1) OPP table type
  (Walter Lozano)"

* tag 'pm-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  opp: Increase parsed_static_opps in _of_add_opp_table_v1()
  cpufreq: intel_pstate: Fix active mode setting from command line

Merge tag 'char-misc-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc into master

Pull char/misc fixes from Greg KH:
 "Here are number of small char/misc driver fixes for 5.8-rc6

  Not that many complex fixes here, just a number of small fixes for
  reported issues, and some new device ids. Nothing fancy.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (21 commits)
  virtio: virtio_console: add missing MODULE_DEVICE_TABLE() for rproc serial
  intel_th: Fix a NULL dereference when hub driver is not loaded
  intel_th: pci: Add Emmitsburg PCH support
  intel_th: pci: Add Tiger Lake PCH-H support
  intel_th: pci: Add Jasper Lake CPU support
  virt: vbox: Fix guest capabilities mask check
  virt: vbox: Fix VBGL_IOCTL_VMMDEV_REQUEST_BIG and _LOG req numbers to match upstream
  uio_pdrv_genirq: fix use without device tree and no interrupt
  uio_pdrv_genirq: Remove warning when irq is not specified
  coresight: etmv4: Fix CPU power management setup in probe() function
  coresight: cti: Fix error handling in probe
  Revert "zram: convert remaining CLASS_ATTR() to CLASS_ATTR_RO()"
  mei: bus: don't clean driver pointer
  misc: atmel-ssc: lock with mutex instead of spinlock
  phy: sun4i-usb: fix dereference of pointer phy0 before it is null checked
  phy: rockchip: Fix return value of inno_dsidphy_probe()
  phy: ti: j721e-wiz: Constify structs
  phy: ti: am654-serdes: Constify regmap_config
  phy: intel: fix enum type mismatch warning
  phy: intel: Fix compilation error on FIELD_PREP usage
  ...

Merge tag 'driver-core-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into master

Pull driver core fixes from Greg KH:
 "Here are 3 driver core fixes for 5.8-rc6.

  They resolve some issues found with the deferred probe code for some
  types of devices on some embedded systems. They have been tested a
  bunch and have been in linux-next for a while with no reported issues"

* tag 'driver-core-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver core: Avoid deferred probe due to fw_devlink_pause/resume()
  driver core: Rename dev_links_info.defer_sync to defer_hook
  driver core: Don't do deferred probe in parallel with kernel_init thread

Merge tag 'staging-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging into master

Pull IIO and staging driver fixes from Greg KH:
 "Here are some IIO and staging driver fixes for 5.8-rc6.

  The majority of fixes are for IIO drivers, resolving a number of small
  reported issues, and there are some counter fixes in here too that
  were tied to the IIO fixes. There's only one staging driver fix here,
  a comedi fix found by code inspection.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'staging-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: comedi: verify array index is correct before using it
  iio: adc: ad7780: Fix a resource handling path in 'ad7780_probe()'
  iio:pressure:ms5611 Fix buffer element alignment
  iio:humidity:hts221 Fix alignment and data leak issues
  iio:humidity:hdc100x Fix alignment and data leak issues
  iio:magnetometer:ak8974: Fix alignment and data leak issues
  iio: adc: adi-axi-adc: Fix object reference counting
  iio: pressure: zpa2326: handle pm_runtime_get_sync failure
  counter: 104-quad-8: Add lock guards - filter clock prescaler
  counter: 104-quad-8: Add lock guards - differential encoder
  iio: core: add missing IIO_MOD_H2/ETHANOL string identifiers
  iio: magnetometer: ak8974: Fix runtime PM imbalance on error
  iio: mma8452: Add missed iio_device_unregister() call in mma8452_probe()
  iio:health:afe4404 Fix timestamp alignment and prevent data leak.
  iio:health:afe4403 Fix timestamp alignment and prevent data leak.

Pull tty/serial driver fixes from Greg KH:
 :Here are some small tty and serial driver fixes for 5.8-rc6.

  The largest set of patches in here is a revert of the sysrq changes
  that went into 5.8-rc1 but turned out to cause a noticable overhead
  and cpu usage.

  Other than that, there's a few small serial driver fixes to resolve
  reported issues, and finally resolving the spinlock init problem on
  many serial driver consoles.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: core: Initialise spin lock before use in uart_configure_port()
  serial: mxs-auart: add missed iounmap() in probe failure and remove
  serial: sh-sci: Initialize spinlock for uart console
  Revert "tty: xilinx_uartps: Fix missing id assignment to the console"
  serial: core: drop redundant sysrq checks
  serial: core: fix sysrq overhead regression
  Revert "serial: core: Refactor uart_unlock_and_check_sysrq()"
  tty/serial: fix serial_core.c kernel-doc warnings
  tty: serial: cpm_uart: Fix behaviour for non existing GPIOs

Merge tag 'thermal-v5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux into master

Pull thermal fixes from Daniel Lezcano:

 - Fix invalid index array access on int340x_thermal leading to a kernel
   panic (Bartosz Szczepanek)

 - Fix debug message level to prevent flooding on some platform (Alex
   Hung)

 - Fix invalid bank access by reverting "thermal: mediatek: fix register
   index error" (Enric Balletbo i Serra)

* tag 'thermal-v5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
  Revert "thermal: mediatek: fix register index error"
  thermal: int3403_thermal: Downgrade error message
  thermal/int340x_thermal: Prevent page fault on .set_mode() op

* pm-cpufreq:
  cpufreq: intel_pstate: Fix active mode setting from command line

Pull an operating performance points (OPP) framework fix for 5.8-rc6 from
Viresh Kumar:

"This fixes freeing of the OPP entries for the legacy OPP table type (v1)."

* 'opp/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  opp: Increase parsed_static_opps in _of_add_opp_table_v1()

Add headset_jack for the intel reference board support with
10ec:1230.
Signed-off-by: PeiSen Hou <pshou@realtek.com.tw>
Link: https://lore.kernel.org/r/20200716090134.9811-1-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

ASUS UX563 speaker can't output.
Add quirk to link suitable model will enable it.
This model also could enable headset Mic.
Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/96dee3ab01a04c28a7b44061e88009dd@realtek.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

ASUS UX533 and UX534 speaker still can't output.
End User feedback speaker didn't have output.
Add this COEF value will enable it.

Fixes: 4e051106 ("ALSA: hda/realtek: Enable audio jacks of ASUS UX533FD with ALC294")
Cc: <stable@vger.kernel.org>
Signed-off-by: Kailang Yang <kailang@realtek.com>
Link: https://lore.kernel.org/r/80334402a93b48e385f8f4841b59ae09@realtek.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

We recently moved setting inode flag OVL_UPPERDATA to ovl_lookup().

When looking up an overlay dentry, upperdentry may be found by index
and not by name.  In that case, we fail to read the metacopy xattr
and falsly set the OVL_UPPERDATA on the overlay inode.

This caused a regression in xfstest overlay/033 when run with
OVERLAY_MOUNT_OPTIONS="-o metacopy=on".

Fixes: 28166ab3 ("ovl: initialize OVL_UPPERDATA in ovl_lookup()")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

The check if user has changed the overlay file was wrong, causing unneeded
call to ovl_change_flags() including taking f_lock on every file access.

Fixes: d9899030 ("ovl: do not generate duplicate fsnotify events for "fake" path")
Cc: <stable@vger.kernel.org> # v4.19+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Currently, when using _of_add_opp_table_v2 parsed_static_opps is
increased and this value is used in _opp_remove_all_static() to
check if there are static opp entries that need to be freed.
Unfortunately this does not happen when using _of_add_opp_table_v1(),
which leads to warnings.

This patch increases parsed_static_opps in _of_add_opp_table_v1() in a
similar way as in _of_add_opp_table_v2().

Fixes: 03758d60 ("opp: Replace list_kref with a local counter")
Cc: v5.6+ <stable@vger.kernel.org> # v5.6+
Signed-off-by: Walter Lozano <walter.lozano@collabora.com>
[ Viresh: Do the operation with lock held and set the value to 1 instead
	  of incrementing it ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux into master

Pull clk fixes from Stephen Boyd:
 "A couple build fixes for issues exposed this merge window and a fix
  for the eMMC clk on AST2600 SoCs that fixes the rate that is
  calculated by the clk framework"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: Specify IOMEM dependency for HSDK pll driver
  clk: AST2600: Add mux for EMMC clock
  clk: mvebu: ARMADA_AP_CPU_CLK needs to select ARMADA_AP_CP_HELPER

Merge tag 'drm-intel-fixes-2020-07-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.8-rc6:
- FBC w/a stride fix
- Fix use-after-free fix on module reload
- Ignore irq enabling on the virtual engines to fix device sleep
- Use GTT when saving/restoring engine GPR
- Fix selftest sort function
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87ft9t0vtt.fsf@intel.com

 * aspeed: setup fbdev console after registering device; avoids warning
   and stacktrace in dmesg log
 * dmabuf: protect dmabuf->name with a spinlock; avoids sleeping in
   atomic context
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715171756.GA18606@linux-uq9g

fix for black screens
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: "Roland Scheidegger (VMware)" <rscheidegger.oss@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715161843.21118-1-rscheidegger.oss@gmail.com

Merge tag 'platform-drivers-x86-v5.8-2' of git://git.infradead.org/linux-platform-drivers-x86 into master

Pull x86 platform driver fixes from Andriy Shevchenko:
 "Small fixes for this cycle:

   - Fix procfs handling in Thinkpad ACPI driver

   - Fix battery management on new ASUS laptops

   - New IDs (Sapphire Rapids) in ISST tool"

* tag 'platform-drivers-x86-v5.8-2' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: asus-wmi: allow BAT1 battery name
  platform/x86: ISST: Add new PCI device ids
  platform/x86: thinkpad_acpi: Revert "Use strndup_user() in dispatch_proc_write()"

Merge tag 'dmaengine-fix-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine into master

Pull dmaengine fixes from Vinod Koul:

 - update dmaengine tree location to kernel.org

 - dmatest fix for completing threads

 - driver fixes for k3dma, fsl-dma, idxd, ,tegra, and few other drivers

* tag 'dmaengine-fix-5.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (21 commits)
  dmaengine: ioat setting ioat timeout as module parameter
  dmaengine: fsl-edma: fix wrong tcd endianness for big-endian cpu
  dmaengine: dmatest: stop completed threads when running without set channel
  dmaengine: fsl-edma-common: correct DSIZE_32BYTE
  dmaengine: dw: Initialize channel before each transfer
  dmaengine: idxd: fix misc interrupt handler thread unmasking
  dmaengine: idxd: cleanup workqueue config after disabling
  dmaengine: tegra210-adma: Fix runtime PM imbalance on error
  dmaengine: mcf-edma: Fix NULL pointer exception in mcf_edma_tx_handler
  dmaengine: fsl-edma: Fix NULL pointer exception in fsl_edma_tx_handler
  dmaengine: fsl-edma: Add lockdep assert for exported function
  dmaengine: idxd: fix hw descriptor fields for delta record
  dmaengine: ti: k3-udma: add missing put_device() call in of_xudma_dev_get()
  dmaengine: sh: usb-dmac: set tx_result parameters
  dmaengine: ti: k3-udma: Fix delayed_work usage for tx drain workaround
  dmaengine: idxd: fix cdev locking for open and release
  dmaengine: imx-sdma: Fix: Remove 'always true' comparison
  MAINTAINERS: switch dmaengine tree to kernel.org
  dmaengine: ti: k3-udma: Fix the running channel handling in alloc_chan_resources
  dmaengine: ti: k3-udma: Fix cleanup code for alloc_chan_resources
  ...

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

Fixes: f1774cb8 ("X.509: parse public key parameters from x509 for akcipher")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The afs filesystem driver allows unstarted operations to be cancelled by
signal, but most of these can easily be restarted (mkdir for example).  The
primary culprits for reproducing this are those applications that use
SIGALRM to display a progress counter.

File lock-extension operation is marked uninterruptible as we have a
limited time in which to do it, and the release op is marked
uninterruptible also as if we fail to unlock a file, we'll have to wait 20
mins before anyone can lock it again.

The store operation logs a warning if it gets interruption, e.g.:

	kAFS: Unexpected error from FS.StoreData -4

because it's run from the background - but it can also be run from
fdatasync()-type things.  However, store options aren't marked
interruptible at the moment.

Fix this in the following ways:

 (1) Mark store operations as uninterruptible.  It might make sense to
     relax this for certain situations, but I'm not sure how to make sure
     that background store ops aren't affected by signals to foreground
     processes that happen to trigger them.

 (2) In afs_get_io_locks(), where we're getting the serialisation lock for
     talking to the fileserver, return ERESTARTSYS rather than EINTR
     because a lot of the operations (e.g. mkdir) are restartable if we
     haven't yet started sending the op to the server.

Fixes: e49c7b2f ("afs: Build an abstraction around an "operation" concept")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Without upperdir mount option, there is no index dir and the dependency
checks nfs_export => index for mount options parsing are incorrect.

Allow the combination nfs_export=on,index=off with no upperdir and move
the check for dependency redirect_dir=nofollow for non-upper mount case
to mount options parsing.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

With index feature enabled, on failure to create index dir, overlay is
being mounted read-only.  However, we do not forbid user to remount overlay
read-write.  Fix that by setting ofs->workdir to NULL, which prevents
remount read-write.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Commit 9df085f3 ("ovl: relax requirement for non null uuid of lower
fs") relaxed the requirement for non null uuid with single lower layer to
allow enabling index and nfs_export features with single lower squashfs.

Fabian reported a regression in a setup when overlay re-uses an existing
upper layer and re-formats the lower squashfs image.  Because squashfs
has no uuid, the origin xattr in upper layer are decoded from the new
lower layer where they may resolve to a wrong origin file and user may
get an ESTALE or EIO error on lookup.

To avoid the reported regression while still allowing the new features
with single lower squashfs, do not allow decoding origin with lower null
uuid unless user opted-in to one of the new features that require
following the lower inode of non-dir upper (index, xino, metacopy).
Reported-by: Fabian <godi.beat@gmx.net>
Link: https://lore.kernel.org/linux-unionfs/32532923.JtPX5UtSzP@fgdesktop/
Fixes: 9df085f3 ("ovl: relax requirement for non null uuid of lower fs")
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Mounting with nfs_export=on, xfstests overlay/031 triggers a kernel panic
since v5.8-rc1 overlayfs updates.

 overlayfs: orphan index entry (index/00fb1..., ftype=4000, nlink=2)
 BUG: kernel NULL pointer dereference, address: 0000000000000030
 RIP: 0010:ovl_cleanup_and_whiteout+0x28/0x220 [overlay]

Bisect point at commit c21c839b ("ovl: whiteout inode sharing")

Minimal reproducer:
--------------------------------------------------
rm -rf l u w m
mkdir -p l u w m
mkdir -p l/testdir
touch l/testdir/testfile
mount -t overlay -o lowerdir=l,upperdir=u,workdir=w,nfs_export=on overlay m
echo 1 > m/testdir/testfile
umount m
rm -rf u/testdir
mount -t overlay -o lowerdir=l,upperdir=u,workdir=w,nfs_export=on overlay m
umount m
--------------------------------------------------

When mount with nfs_export=on, and fail to verify an orphan index, we're
cleaning this index from indexdir by calling ovl_cleanup_and_whiteout().
This dereferences ofs->workdir, that was earlier set to NULL.

The design was that ovl->workdir will point at ovl->indexdir, but we are
assigning ofs->indexdir to ofs->workdir only after ovl_indexdir_cleanup().
There is no reason not to do it sooner, because once we get success from
ofs->indexdir = ovl_workdir_create(... there is no turning back.
Reported-and-tested-by: Murphy Zhou <jencce.kernel@gmail.com>
Fixes: c21c839b ("ovl: whiteout inode sharing")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Decoding a lower directory file handle to overlay path with cold
inode/dentry cache may go as follows:

1. Decode real lower file handle to lower dir path
2. Check if lower dir is indexed (was copied up)
3. If indexed, get the upper dir path from index
4. Lookup upper dir path in overlay
5. If overlay path found, verify that overlay lower is the lower dir
   from step 1

On failure to verify step 5 above, user will get an ESTALE error and a
WARN_ON will be printed.

A mismatch in step 5 could be a result of lower directory that was renamed
while overlay was offline, after that lower directory has been copied up
and indexed.

This is a scripted reproducer based on xfstest overlay/052:

  # Create lower subdir
  create_dirs
  create_test_files $lower/lowertestdir/subdir
  mount_dirs
  # Copy up lower dir and encode lower subdir file handle
  touch $SCRATCH_MNT/lowertestdir
  test_file_handles $SCRATCH_MNT/lowertestdir/subdir -p -o $tmp.fhandle
  # Rename lower dir offline
  unmount_dirs
  mv $lower/lowertestdir $lower/lowertestdir.new/
  mount_dirs
  # Attempt to decode lower subdir file handle
  test_file_handles $SCRATCH_MNT -p -i $tmp.fhandle

Since this WARN_ON() can be triggered by user we need to relax it.

Fixes: 4b91c30a ("ovl: lookup connected ancestor of dir in inode cache")
Cc: <stable@vger.kernel.org> # v4.16+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

ovl_check_origin outparam 'ctrp' argument not used by caller.  So remove
this argument.
Signed-off-by: youngjun <her0gyugyu@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

"ovl_copy_up_flags" is used in copy_up.c.
so, change it static.
Signed-off-by: youngjun <her0gyugyu@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

When "ovl_is_inuse" true case, trap inode reference not put.  plus adding
the comment explaining sequence of ovl_is_inuse after ovl_setup_trap.

Fixes: 0be0bfd2 ("ovl: fix regression caused by overlapping layers detection")
Cc: <stable@vger.kernel.org> # v4.19+
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: youngjun <her0gyugyu@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

The battery on my laptop ASUS TUF Gaming FX706II is named BAT1.
This patch allows battery extension to load.
Signed-off-by: Vasiliy Kupriakov <rublag-ns@yandex.ru>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>