Reorders a couple of device IDs (Logitech controllers) to ensure
that they are in hexidecimal order.
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch removes code which is now unnecessary for setting the fuzz/flat
characterics for the logitech DFP wheel. This is now done in the previous
patch by marking the wheel as a multi-axis device.
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch ensures that the Logitech wheels are not initialised with
default fuzz/flat values, by marking them as multiaxis devices (rather
than joysticks).
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Previously 'LG4FF' was only used for the WiiWheel, however it is now used
for all the Logitech Wheels. This patch corrects the detection mechanism
for the patching the report descriptor to ensure only the WiiWheel will
be patched.
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch provides a modified report descriptor to split accelerator
and brake, and adds the 'NO_GET' flag to prevent it hanging on
connection.
Note: for convience this patch is against the follow patch which was applied
earlier this week.
https://patchwork.kernel.org/patch/2153471/
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This is the original report descriptor as reported by lsusb -vd 046d:c294.
Signed-off-by: Paul Sbarra <sbarra.paul@gmail.com>
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The ThingM blink(1) is an open source hardware USB RGB LED. It contains
an internal EEPROM, allowing to configure up to 12 light patterns. A
light pattern is a RGB color plus a fade time. This driver registers a
LED class instance with additional sysfs attributes to support basic
functions such as setting RGB colors, fade and playing. Other functions
are still accessible through the hidraw interface.
At this time, the only documentation for the device is the firmware
source code from ThingM, plus a few schematics. They are available at:
https://github.com/todbot/blink1
This patch is version 3. It updates the name of the source file, the
driver and the led sysfs entry, according to comments from Jiri Kosina
and Simon Wood.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Unfortunately UHID interface, as it was introduced, is broken with 32 bit
userspace running on 64 bit kernels as it uses a pointer in its userspace
facing API.
Fix it by checking if we are executing compat task and munge the request
appropriately.
Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The buttons of the Wii Remote Nunchuck extension are actually active low.
Fix the parser to forward the inverted values. The comment in the function
always said "0 == pressed" but the implementation was wrong from the
beginning.
Cc: stable@vger.kernel.org
Reported-by: Victor Quicksilver <victor.quicksilver@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
These are simple data acquistion boards, not HID devices and are handled
by the vmk80xx comedi driver. At least one of them (10cf:5500)
misidentifies itself as a HID in its USB interface descriptor. Ignore
all these devices.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
We now have two transport mediums: USB and I2C, where sensor hubs can
exists. So instead of constraining the driver to only these two we let it
to match any HID bus as long as the group is HID_GROUP_SENSOR_HUB.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This table is not used anywhere in the driver so kill it.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Since the advent of HID over I2C protocol, it is possible to have sensor
hubs behind I2C bus as well. We can autodetect this in a same way than USB
sensor hubs.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The use of input_configured() allows the ntrig driver to actually
change the name of the input and its bitmask before it is added to the
input subsystem. Thus, the logs are coherents and udev catch the real
bitmask when the device is added.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The previous implementation registered a pointer towards hid-core
to the value of contact count. This is not safe and may be difficult
to debug if hid-core ever changes its implementation.
The use of regular indexes is a better choice.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
HID Sensors framework support (CONFIG_HID_SENSOR_HUB) unconditionally
selects MFD_CORE which however depends on GENERIC_HARDIRQS.
So add this dependency to HID_SENSOR_HUB as well.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
By running a test on all the traces of the devices I have,
I noticed that the class MT_CLS_ALWAYS_TRUE could handle all
the devices I've seen so far without any other quirks.
I guess this is the behavior Win 7 requires in its driver.
We can change the default class then and keep the existing classes
for backward compatibility and performances for some of them.
Two operations have been done:
* replaced MT_CLS_DEFAULT by MT_CLS_NSMU
* then replaced MT_CLS_ALWAYS_TRUE by MT_CLS_DEFAULT
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The previous protocol was nearly working, but when several fingers were
present on the sensor, those that were not moving were not updated
in the next report, introducing a lot of releases.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Conflicts:
drivers/hid/hid-multitouch.c
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cando 2087:0a02 was broken, this fixes it.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Since the inclusion of this device in hid-multitouch, the device
did not forward any events. Using the serial class makes it working
again.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The serial protocol makes contact count a redondant information, and
sometimes it is not reliable (TRS-Star are in this case).
Disabling the use of contact count for these devices is thus safer.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The Sharp LC-20FE1-W screen (04dd:9681) behaves like the Nexio 42".
It may report out of ranges values that are filtered out by relying
on the Contact Count HID field.
Adding the quirk MT_QUIRK_CONTACT_CNT_ACCURATE makes hid-multitouch
strongest against this kind of device, without breaking the current
devices.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This device is the worst device I saw. It keeps TipSwitch and InRange
at 1 for fingers that are not touching the panel.
The solution is to rely on the field ContactCount, which is accurate
as the correct information are packed at the begining of the frame.
Unfortunately, CountactCount is most of the time at the end of the report.
The solution is to pick it when we have the whole report in raw_event.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Nexio 42" devices requires to rely on the HID field Contact
Count to compute the valid values. However, this field is
most of the time at the end of the report, meaning that we
need to get the all report parsed before processing it.
This patch does not introduce functional changes.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This callback is called when the parsing of the report has been done
by hid-core (so after the calls to .event). The hid drivers can now
have access to the whole report by relying on the values stored in
the different fields.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
PullHID fixes from Jiri Kosina:
- fix i2c-hid and hidraw interaction, by Benjamin Tissoires
- a quirk to make a particular device (Formosa IR receiver) work
properly, by Nicholas Santos
* 'for-3.8/upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: i2c-hid: fix i2c_hid_output_raw_report
HID: usbhid: quirk for Formosa IR receiver
HID: remove x bit from sensor doc
- Error reporting in nfs_xdev_mount incorrectly maps all errors to ENOMEM
- Fix an NFSv4 refcounting issue
- Fix a mount failure when the server reboots during NFSv4 trunking discovery
- NFSv4.1 mounts may need to run the lease recovery thread.
- Don't silently fail setattr() requests on mountpoints
- Fix a SUNRPC socket/transport livelock and priority queue issue
- We must handle NFS4ERR_DELAY when resetting the NFSv4.1 session.
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Merge tag 'nfs-for-3.8-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
- Error reporting in nfs_xdev_mount incorrectly maps all errors to
ENOMEM
- Fix an NFSv4 refcounting issue
- Fix a mount failure when the server reboots during NFSv4 trunking
discovery
- NFSv4.1 mounts may need to run the lease recovery thread.
- Don't silently fail setattr() requests on mountpoints
- Fix a SUNRPC socket/transport livelock and priority queue issue
- We must handle NFS4ERR_DELAY when resetting the NFSv4.1 session.
* tag 'nfs-for-3.8-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4.1: Handle NFS4ERR_DELAY when resetting the NFSv4.1 session
SUNRPC: When changing the queue priority, ensure that we change the owner
NFS: Don't silently fail setattr() requests on mountpoints
NFSv4.1: Ensure that nfs41_walk_client_list() does start lease recovery
NFSv4: Fix NFSv4 trunking discovery
NFSv4: Fix NFSv4 reference counting for trunked sessions
NFS: Fix error reporting in nfs_xdev_mount
Pull MIPS updates from Ralf Baechle:
"A number of fixes all across the MIPS tree. No area is particularly
standing out and things have cooled down quite nicely for a release."
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: Function tracer: Fix broken function tracing
mips: Move __virt_addr_valid() to a place for MIPS 64
MIPS: Netlogic: Fix UP compilation on XLR
MIPS: AR71xx: Fix AR71XX_PCI_MEM_SIZE
MIPS: AR724x: Fix AR724X_PCI_MEM_SIZE
MIPS: Lantiq: Fix cp0_perfcount_irq mapping
MIPS: DSP: Fix DSP mask for registers.
MIPS: Fix build failure by adding definition of pfn_pmd().
MIPS: Octeon: Fix warning.
MIPS: delay.c: Check BITS_PER_LONG instead of __SIZEOF_LONG__
MIPS: PNX833x: Fix comment.
MIPS: Add struct p_format to union mips_instruction.
MIPS: Export <asm/break.h>.
MIPS: BCM47xx: Enable SSB prerequisite SSB_DRIVER_PCICORE.
MIPS: BCM47xx: Select GPIOLIB for BCMA on bcm47xx platform
MIPS: vpe.c: Fix null pointer dereference in print arguments.
i2c_hid_output_raw_report is used by hidraw to forward set_report requests.
The current implementation of i2c_hid_set_report needs to take the
report_id as an argument. The report_id is stored in the first byte
of the buffer in argument of i2c_hid_output_raw_report.
Not removing the report_id from the given buffer adds this byte 2 times
in the command, leading to a non working command.
Reported-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The last field of the driver_data->leds[] array is used to store the
special toggle for setting all leds simultaneously, so we need to allocate
appropriate number of led_classdev pointers.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
We usually group drivers on a per-vendor basis, implementing device-specific
deviations from the standard in vendor-specific driver.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch to the SRW-S1 driver adds the ability to control all
LEDs simultaneously as testing showed that it was slow (noticably!!)
when seting or clearing all the LEDs in turn.
It adds a 'RPMALL' LED, whose behavoir is asserted to all the LEDs in
the bar graph, individual LEDs can subsequently be turned on/off
individually.
Signed-off-by: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch to the SRW-S1 driver adds support for the LED RPM
meter on the front of the device. The LEDs are controlled via
/sys/class/leds interface, with an individual control for each
of the 15 LEDs.
Signed-off-by: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This patch to the SRW-S1 driver re-writes the HID descriptor
to insert a section for the 3 dials on the device, previously
these were contained within a 'Manufacturer Specific' usage
page.
Signed-off-by: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Add support the SRW-S1 by patching HID descriptor to read axis
as Generic Desktop X, Y and Z (rather than Usage page being
'Simulation').
Signed-off-by: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Function tracing is currently broken for all 32 bit MIPS platforms.
When tracing is enabled, the kernel immediately hangs on boot.
This is a result of commit b732d439cb
that changes the kernel/trace/Kconfig file so that is no longer
forces FRAME_POINTER when FUNCTION_TRACING is enabled.
MIPS frame pointers are generally considered to be useless because
they cannot be used to unwind the stack. Unfortunately the MIPS
function tracing code has bugs that are masked by the use of frame
pointers. This commit fixes the bugs so that MIPS frame pointers
don't need to be enabled.
The bugs are a result of the odd calling sequence used to call the trace
routine. This calling sequence is inserted into every traceable function
when the tracing CONFIG option is enabled. This sequence is generated
for 32bit MIPS platforms by the compiler via the "-pg" flag.
Part of the sequence is "addiu sp,sp,-8" in the delay slot after every
call to the trace routine "_mcount" (some legacy thing where 2 arguments
used to be pushed on the stack). The _mcount routine is expected to
adjust the sp by +8 before returning. So when not disabled, the original
jalr and addiu will be there, so _mcount has to adjust sp.
The problem is that when tracing is disabled for a function, the
"jalr _mcount" instruction is replaced with a nop, but the
"addiu sp,sp,-8" is still executed and the stack pointer is left
trashed. When frame pointers are enabled the problem is masked
because any access to the stack is done through the frame
pointer and the stack pointer is restored from the frame pointer when
the function returns.
This patch writes two nops starting at the address of the "jalr _mcount"
instruction whenever tracing is disabled. This means that the
"addiu sp,sp.-8" will be converted to a nop along with the "jalr". When
disabled, there will be two nops.
This is SMP safe because the first time this happens is during
ftrace_init() which is before any other processor has been started.
Subsequent calls to enable/disable tracing when other CPUs ARE running
will still be safe because the enable will only change the first nop
to a "jalr" and the disable, while writing 2 nops, will only be changing
the "jalr". This patch also stops using stop_machine() to call the
tracer enable/disable routines and calls them directly because the
routines are SMP safe.
When the kernel first boots we have to be able to handle the gcc
generated jalr, addui sequence until ftrace_init gets a chance to run
and change the sequence. At this point mcount just adjusts the stack
and returns. When ftrace_init runs, we convert the jalr/addui to nops.
Then whenever tracing is enabled we convert the first nop to a "jalr
mcount+8". The mcount+8 entry point skips the stack adjust.
[ralf@linux-mips.org: Folded in Steven Rostedt's build fix.]
Signed-off-by: Al Cooper <alcooperx@gmail.com>
Cc: rostedt@goodmis.org
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/4806/
Patchwork: https://patchwork.linux-mips.org/patch/4841/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Commit d3ce884318 "MIPS: Fix modpost error in modules attepting to use
virt_addr_valid()" moved __virt_addr_valid() from a macro in a header
file to a function in ioremap.c. But ioremap.c is only compiled for MIPS
32, and not for MIPS 64.
When compiling for my yeeloong2, which supposedly supports hibernation,
which compiles kernel/power/snapshot.c which calls virt_addr_valid(), I
got this error:
LD init/built-in.o
kernel/built-in.o: In function `memory_bm_free':
snapshot.c:(.text+0x4c9c4): undefined reference to `__virt_addr_valid'
snapshot.c:(.text+0x4ca58): undefined reference to `__virt_addr_valid'
kernel/built-in.o: In function `snapshot_write_next':
(.text+0x4e44c): undefined reference to `__virt_addr_valid'
kernel/built-in.o: In function `snapshot_write_next':
(.text+0x4e890): undefined reference to `__virt_addr_valid'
make[1]: *** [vmlinux] Error 1
make: *** [sub-make] Error 2
I suspect that __virt_addr_valid() is fine for mips 64. I moved it to
mmap.c such that it gets compiled for mips 64 and 32.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4842/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Pull x86 EFI fixes from Peter Anvin:
"This is a collection of fixes for the EFI support. The controversial
bit here is a set of patches which bumps the boot protocol version as
part of fixing some serious problems with the EFI handover protocol,
used when booting under EFI using a bootloader as opposed to directly
from EFI. These changes should also make it a lot saner to support
cross-mode 32/64-bit EFI booting in the future. Getting these changes
into 3.8 means we avoid presenting an inconsistent ABI to bootloaders.
Other changes are display detection and fixing efivarfs."
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, efi: remove attribute check from setup_efi_pci
x86, build: Dynamically find entry points in compressed startup code
x86, efi: Fix PCI ROM handing in EFI boot stub, in 32-bit mode
x86, efi: Fix 32-bit EFI handover protocol entry point
x86, efi: Fix display detection in EFI boot stub
x86, boot: Define the 2.12 bzImage boot protocol
x86/boot: Fix minor fd leakage in tools/relocs.c
x86, efi: Set runtime_version to the EFI spec revision
x86, efi: fix 32-bit warnings in setup_efi_pci()
efivarfs: Delete dentry from dcache in efivarfs_file_write()
efivarfs: Never return ENOENT from firmware
efi, x86: Pass a proper identity mapping in efi_call_phys_prelog
efivarfs: Drop link count of the right inode
Pull x86 fixes from Peter Anvin:
"This is a collection of miscellaneous fixes, the most important one is
the fix for the Samsung laptop bricking issue (auto-blacklisting the
samsung-laptop driver); the efi_enabled() changes you see below are
prerequisites for that fix.
The other issues fixed are booting on OLPC XO-1.5, an UV fix, NMI
debugging, and requiring CAP_SYS_RAWIO for MSR references, just as
with I/O port references."
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
samsung-laptop: Disable on EFI hardware
efi: Make 'efi_enabled' a function to query EFI facilities
smp: Fix SMP function call empty cpu mask race
x86/msr: Add capabilities check
x86/dma-debug: Bump PREALLOC_DMA_DEBUG_ENTRIES
x86/olpc: Fix olpc-xo1-sci.c build errors
arch/x86/platform/uv: Fix incorrect tlb flush all issue
x86-64: Fix unwind annotations in recent NMI changes
x86-32: Start out cr0 clean, disable paging before modifying cr3/4
Pull console lockdep checking revert from Dave Airlie.
The lockdep splat this showed was interesting, but it's very very old,
and we won't be fixing it until 3.9. In the meantime, undo the lockdep
annotation so that we don't generate the (known) console lockdep issue,
and then possibly hide any potential other (unknown) lockdep problems
that got disabled by the first one that triggered.
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
Revert "console: implement lockdep support for console_lock"
This reverts commit daee779718.
I'll requeue this after the console locking fixes, so lockdep
is useful again for people until fbcon is fixed.
Signed-off-by: Dave Airlie <airlied@redhat.com>
NFS4ERR_DELAY is a legal reply when we call DESTROY_SESSION. It
usually means that the server is busy handling an unfinished RPC
request. Just sleep for a second and then retry.
We also need to be able to handle the NFS4ERR_BACK_CHAN_BUSY return
value. If the NFS server has outstanding callbacks, we just want to
similarly sleep & retry.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
This fixes a livelock in the xprt->sending queue where we end up never
making progress on lower priority tasks because sleep_on_priority()
keeps adding new tasks with the same owner to the head of the queue,
and priority bumps mean that we keep resetting the queue->owner to
whatever task is at the head of the queue.
Regression introduced by commit c05eecf636
(SUNRPC: Don't allow low priority tasks to pre-empt higher priority ones).
Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* EFI boot stub fix for Macbook Pro's from Maarten Lankhorst
* Fix an oops in efivarfs from Lingzhu Xiang
* 32-bit warning cleanups from Jan Beulich
* Patch to Boot on >512GB RAM systems from Nathan Zimmer
* Set efi.runtime_version correctly
* efivarfs updates
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Merge tag 'efi-for-3.8' into x86/efi
Various urgent EFI fixes and some warning cleanups for v3.8
* EFI boot stub fix for Macbook Pro's from Maarten Lankhorst
* Fix an oops in efivarfs from Lingzhu Xiang
* 32-bit warning cleanups from Jan Beulich
* Patch to Boot on >512GB RAM systems from Nathan Zimmer
* Set efi.runtime_version correctly
* efivarfs updates
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Ensure that any setattr and getattr requests for junctions and/or
mountpoints are sent to the server. Ever since commit
0ec26fd069 (vfs: automount should ignore LOOKUP_FOLLOW), we have
silently dropped any setattr requests to a server-side mountpoint.
For referrals, we have silently dropped both getattr and setattr
requests.
This patch restores the original behaviour for setattr on mountpoints,
and tries to do the same for referrals, provided that we have a
filehandle...
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
