Commit graph

691,473 commits

Author SHA1 Message Date
Tomi Valkeinen
9f759225e4 drm/omap: use dispc_ops
Change omapdrm to get dispc_ops and use that to call the dispc functions
instead or direct function calls.

The change is very straightforward.

The only problem was in omap_crtc_init() which calls pipe2vbl(crtc), and
at that point of time the crtc->dev link, which is used to get the
dispc_ops, has not been set up yet. This patch makes omap_crtc_init()
skip the call to pipe2vbl() and instead calls
dispc_ops->mgr_get_vsync_irq() directly.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
a1a37647d2 drm/omap: fill dispc_ops
This patch changes the current omapdss driver to fill a dispc_ops struct
and set it to omapdss-base.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
8a13398c3f drm/omap: add dispc_ops
We want to change the dispc API from plain functions to a struct with
functions pointers, so that omapdrm can call either omapdss or omapdss6
depending on the platform.

This patch adds 'struct dispc_ops' and adds functions to omapdss-base
to set and get the ops.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
c283400aa5 drm/omap: move dispc related dss-feat funcs to dispc
omapdrm still uses a few non-dispc functions: dss_feat_get_num_mgrs(),
dss_feat_get_num_ovls() and  dss_feat_get_supported_color_modes(). We
want to provide omapdrm a single dispc_ops function pointer struct so
that omapdrm will use either the current omapdss or the new omapdss6
driver depending on the platform.

Those three functions are really dispc functions, but are located in the
dss_features.c for legacy reasons.

This patch adds similar functionss to the dispc, and changes omapdrm to
use those new functions. Underneath the functions still call the
functions from dss_feature.c.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
82e83f67a9 drm/omap: move display, dss-of, output to omapdss-base
This patch moves the common parts of omapdss to omapdss-base so that
both the current omapdss driver and the new omapdss6 driver can use
them.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
892fdcb05e drm/omap: display: don't use dsi_get_pixel_size()
display.c uses dsi_get_pixel_size() which is implemented in the DSI
driver, and we won't have that in the omapdss-base module, to which we
want to move display.c

This patch changes display.c not to use dsi_get_pixel_size(). The call
can be replaced with a simple check for OMAP_DSS_DSI_FMT_RGB565.

We can also make dsi_get_pixel_size() static as it's no longer used
outside dsi.c.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
39637e1003 drm/omap: output: use dev_err instead of DSSERR
We don't have omapdss's custom error printing functions in the common
omapdss-base module, to which we want to move output.c.

This patch changes output.c to use dev_err instead of DSSERR so that it
doesn't depend on DSSERR.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
7c29971629 drm/omap: move dss_initialized to omapdss-base
omapdss_is_initialized() is used to find out if omapdss has been probed
successfully. This patch moves the related code to the common
omapdss-base module, so that the same support will be there for both
omapdss and omapdss6.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
a99ac0d9f6 drm/omap: add omapdss-base.ko
We are working towards enabling omapdss6, which will consists of a new
dss, dispc and dpi drivers. omapdss6 will be a new module. The panel,
encoder and omapdrm will need to use either the current omapdss driver
or the new omapdss6 driver, depending on the platform.

This will be implemented with a common base module and function
pointers.

This patch adds a skeleton omapdss-base.ko module, to which we'll be
moving common dss functionality like registration of the panels.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
d5e7efad7b drm/omap: fix HDMI sync polarities
While implementing writeback support, odd behavior of WBDELAYCOUNT was
observed with the combination of WB capture and HDMI. The result of the
debugging was that the HDMI sync polarities are not set correctly.

The current code sets the sync polarities going from HDMI WP to DISPC
according to the video mode used, which seems to work normally fine, but
causes problems with WB as WB expects the syncs to be active-high.

This patch changes the HDMI sync polarities so that the DISPC always
gets active-high syncs from HDMI WP, and the HDMI core gets sync
polarities according to the used video mode.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2017-04-03 12:36:40 +03:00
Hemant Hariyani
5f6ab8ca18 drm/omap: Add support for render nodes
Add support for render nodes in omap driver and allow required
ioctls to be accessible via render nodes.

This enables unprivileged clients to allocate resources like GEM buffers
for rendering their content into. Mode setting (KMS ioctls) is not
allowed using render nodes. These buffers are then shared with
a previleged process (e.g compositor) that has mode setting access.

An example of this use case is Android where the hardware composer is
the only master and has mode setting access. Every other client then
uses render node(e.g /dev/dri/renderD128 to allocate and use its buffers.

Signed-off-by: Hemant Hariyani <hemanthariyani@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
7bbdef2b4b drm/omap: improve DPI clock selection on DRA7xx
The clock source selection for the LCD outputs is too hardcoded at the
moment. For example, LCD3 is set to use PLL2_1, and PLL2 doesn't exist
on DRA72x SoCs.

There are quite many ways to configure the clocks, even using HDMI PLL
for LCD outputs, but enabling full configuration of the clocks is rather
tricky.

This patch improves the situation a bit by checking if the PLL about to
be used exists, and if not, tries another one.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
1e90711d23 drm/omap: decrease min width & height
mode_config's min_width and min_height are both set to 32, which is
overly restrictive.

The real limits depend on whether we're configuring a crtc or a plane,
but a limit of 8x2 is safe for both cases.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
0e81798e21 drm/omap: remove divider constraint from hsdiv
The driver only uses even dividers for hsdiv when pclk >= 100MHz, as odd
dividers can create uneven duty cycle. However, while this holds true
for some dividers like DISPC's LCK and PCK dividers, it is not actually
true for hsdiv.

hsdiv always produces even duty cycle, so the constraint can be removed.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
7e3d92749d drm/omap: refactor CRTC HW property setup
The current driver doesn't expose any of the CRTC HW properties like
background color or transparency key, and sets them at CRTC enable time.

Refactor this into a separate function and call that function from
omap_crtc_atomic_flush(). This is the behavior we want when the
properties can be configured, so this patch makes it easier to add
patches later which implement those properties.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2017-04-03 12:36:40 +03:00
Tomi Valkeinen
7d267f068a drm/omap: work-around for errata i886
DRA7 errata i886 (FPDLink PLL Unlocks With Certain SoC PLL M/N Values)
says that FPDLink is sensitive to jitter on the vout clock, and that low
PLL M and N values result in more jitter than high M and N values.

This patch implements a workaround for the problem by changing the PLL
setup to search for clocks starting from high M and N values, instead of
low values. This should not cause any functional change, and only
reduces the jitter.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2017-04-03 12:36:40 +03:00
Bruno Herrera
21b825e404 dt-bindings: Document the STM32 USB OTG DWC2 core binding
This patch adds the documentation for STM32F4x9 USB OTG FS/HS compatible
strings.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
2017-04-03 10:28:25 +02:00
Bruno Herrera
b1f81e0ccb ARM: dts: stm32: Enable USB HS in FS mode (embedded phy) on stm32f429-disco
This patch enables USB HS working in FS mode on stm32f429-disco
with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
2017-04-03 10:28:18 +02:00
Bruno Herrera
c888cc51cf ARM: dts: stm32: Enable USB FS on stm32f469-disco
This patch enables USB FS on stm32f469-disco with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
2017-04-03 10:28:13 +02:00
Bruno Herrera
cd9ef1eff0 ARM: dts: stm32: Add USB FS support for STM32F429 MCU
This patch adds the USB pins and nodes for USB FS core.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
2017-04-03 10:28:04 +02:00
Peter Zijlstra
b5effd3815 debug: Fix __bug_table[] in arch linker scripts
The kbuild test robot reported this build failure on a number
of architectures:

 >         make.cross ARCH=arm
 >    lib/lib.a(bug.o): In function `find_bug':
 > >> lib/bug.c:135: undefined reference to `__start___bug_table'
 > >> lib/bug.c:135: undefined reference to `__stop___bug_table'

Caused by:

  19d436268d ("debug: Add _ONCE() logic to report_bug()")

Which moved the BUG_TABLE from RO_DATA_SECTION() to RW_DATA_SECTION(),
but a number of architectures don't use RW_DATA_SECTION(), so they
ended up with no __bug_table[] ...

Ideally all those would use RW_DATA_SECTION() in their linker scripts,
but that's for another day.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kbuild test robot <fengguang.wu@intel.com>
Cc: kbuild-all@01.org
Cc: tipbuild@zytor.com
Link: http://lkml.kernel.org/r/20170330154927.o6qmgfp4bdhrajbm@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-04-03 10:22:40 +02:00
Antoine Tenart
ffdc394e1b ARM: dts: alpine: add valid clock-frequency values
Update the Alpine clock-frequency values with valid default values. The
bootloader can still update these values if needed, but at least we can
boot if it does not.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
2017-04-03 09:06:55 +02:00
Antoine Tenart
5254588801 ARM: dts: alpine: add spaces before the uart node units.
Cosmetic cleanup to have consistent node definitions. Add a space before
the node units which do not have one.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
2017-04-03 09:06:53 +02:00
Antoine Tenart
70c4b99a3a ARM: dts: alpine: remove 0x's from the uart1 node unit address
Remove 0x's from the uart1 node unit address to have consistent nodes.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
2017-04-03 09:06:49 +02:00
Takashi Iwai
f87e7f2589 ALSA: hda - Improved position reporting on SKL+
Apply the same methods to obtain the current stream position as ASoC
Intel SKL driver uses.  It reads the position from DPIB for a playback
stream while it still reads from the position buffer for a capture
stream.  For a capture stream, some ugly workaround is needed to
settle down the inconsistent position.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-04-03 08:43:17 +02:00
Takashi Iwai
70eafad849 ALSA: hda - Move SKL+ vendor specific register definitions to hda_register.h
They may be used by both legacy and ASoC drivers.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-04-03 08:43:07 +02:00
Takashi Iwai
2c1f81381e ALSA: hda - Avoid tricky macros
The macros _snd_hdac_chip_read() and *_write() expand to different
types (b,w,l) per their argument.  They were thought to be used only
internally for other snd_hdac_chip_*() macros, but in some situations
we need to call these directly, and they are way too ugly.

Instead of saving a few lines, we just write these macros explicitly
with the types, so that they can be used in a saner way.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-04-03 08:42:43 +02:00
Dave Airlie
320d8c3d38 Merge tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc into drm-next
drm-misc for 4.12:

Core:
- Removed some fb subsampling dimension checks from core (Ville)
- Some MST slot cleanup (Dhinakaran)
- Extracted drm_debugfs.h & drm_ioctl.h from drmP.h (Daniel)
- Added drm_atomic_helper_shutdown() to compliment suspend/resume counterparts
  (Daniel)
- Pipe context through legacy modeset to remove legacy_backoff nasties (Daniel)
- Cleanups around vblank as well as allowing lockless counter reads (Chris W.)
- VGA Switcheroo added to MAINTAINERS with Lukas Wunner as reviewer (Lukas)

Drivers:
- Enhancements to rockchip driver probe (Jeffy) and dsi (Chris Z.)
- Thunderbolt external GPU awareness added (Lukas)

* tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc: (63 commits)
  apple-gmux: Don't switch external DP port on 2011+ MacBook Pros
  drm/nouveau: Don't register Thunderbolt eGPU with vga_switcheroo
  drm/amdgpu: Don't register Thunderbolt eGPU with vga_switcheroo
  drm/radeon: Don't register Thunderbolt eGPU with vga_switcheroo
  PCI: Recognize Thunderbolt devices
  MAINTAINERS: Add Lukas Wunner as reviewer for vga_switcheroo
  drm: Fix locking gotcha in page_flip ioctl
  drm: Clarify the role of plane_state argument to drm_simple update().
  drm: Clear e after kfree in drm_mode_page_flip_ioctl
  drm: Convert cmpxchg(bool) back to a two step operation
  drm/bridge: ti-tfp410: support hpd via gpio
  drm: use .hword to represent 16-bit numbers
  Revert unrelated part of "drm: simplify the locking in the GETCRTC ioctl"
  drm: Fixup failure paths in drm_atomic_helper_set_config
  drm: Peek at the current counter/timestamp for vblank queries
  drm: Refactor vblank sequence number comparison
  drm: vblank cannot be enabled if dev->irq_enabled is false
  drm: Mark up accesses of vblank->enabled outside of its spinlock
  drm: Make the decision to keep vblank irq enabled earlier
  drm/atomic-helper: Remove the backoff hack from set_config
  ...
2017-04-03 16:30:24 +10:00
Michael Ellerman
63f44d6514 powerpc/book3s: Print task info if we take a machine check in user mode
For an MCE (Machine Check Exception) that hits while in user mode
MSR(PR=1), print the task info to the console MCE error log. This may
help to identify an application that triggered the MCE.

After this patch the MCE console looks like:

  Severe Machine check interrupt [Recovered]
    NIP: [0000000010039778] PID: 762 Comm: ebizzy
    Initiator: CPU
    Error type: SLB [Multihit]
      Effective address: 0000000010039778

  Severe Machine check interrupt [Not recovered]
    NIP: [0000000010039778] PID: 763 Comm: ebizzy
    Initiator: CPU
    Error type: UE [Page table walk ifetch]
      Effective address: 0000000010039778
  ebizzy[763]: unhandled signal 7 at 0000000010039778 nip 0000000010039778 lr 0000000010001b44 code 30004

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-04-03 16:12:00 +10:00
Mahesh Salgaonkar
5b1d6fc2d4 powerpc/book3s: Print the kernel function name in machine check
For D-side errors we print the load/store address that caused the
machine check as 'Effective address'. But the instruction that may have
caused the machine check can also be helpful, so in addition to printing
the NIP, also print the kernel function name as well.

After this patch the MCE console log would look like:

  Severe Machine check interrupt [Recovered]
    NIP [d00000001bc70194]: init_module+0x194/0x2b0 [bork_kernel]
    Initiator: CPU
    Error type: SLB [Parity]
      Effective address: d000000026de0000

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-04-03 16:11:36 +10:00
Yuejie Shi
89e357d83c af_key: Add lock to key dump
A dump may come in the middle of another dump, modifying its dump
structure members. This race condition will result in NULL pointer
dereference in kernel. So add a lock to prevent that race.

Fixes: 83321d6b98 ("[AF_KEY]: Dump SA/SP entries non-atomically")
Signed-off-by: Yuejie Shi <syjcnss@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2017-04-03 08:05:17 +02:00
Daniel Vetter
ba515d3407 drm/i915: Update DRIVER_DATE to 20170403
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-04-03 07:52:18 +02:00
Al Viro
a8e2844001 Merge branch 'work.statx' into for-next 2017-04-03 01:06:59 -04:00
Al Viro
2b5efc0897 alpha: fix stack smashing in old_adjtimex(2)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:06:53 -04:00
David Howells
3209f68b3c statx: Include a mask for stx_attributes in struct statx
Include a mask in struct stat to indicate which bits of stx_attributes the
filesystem actually supports.

This would also be useful if we add another system call that allows you to
do a 'bulk attribute set' and pass in a statx struct with the masks
appropriately set to say what you want to set.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:06:00 -04:00
David Howells
47071aee6a statx: Reserve the top bit of the mask for future struct expansion
Reserve the top bit of the mask for future expansion of the statx struct
and give an error if statx() sees it set.  All the other bits are ignored
if we see them set but don't support the bit; we just clear the bit in the
returned mask.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:59 -04:00
Darrick J. Wong
5f955f26f3 xfs: report crtime and attribute flags to statx
statx has the ability to report inode creation times and inode flags, so
hook up di_crtime and di_flags to that functionality.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:59 -04:00
David Howells
99652ea56a ext4: Add statx support
Return enhanced file attributes from the Ext4 filesystem.  This includes
the following:

 (1) The inode creation time (i_crtime) as stx_btime, setting STATX_BTIME.

 (2) Certain FS_xxx_FL flags are mapped to stx_attribute flags.

This requires that all ext4 inodes have a getattr call, not just some of
them, so to this end, split the ext4_getattr() function and only call part
of it where appropriate.

Example output:

	[root@andromeda ~]# touch foo
	[root@andromeda ~]# chattr +ai foo
	[root@andromeda ~]# /tmp/test-statx foo
	statx(foo) = 0
	results=fff
	  Size: 0               Blocks: 0          IO Block: 4096    regular file
	Device: 08:12           Inode: 2101950     Links: 1
	Access: (0644/-rw-r--r--)  Uid:     0   Gid:     0
	Access: 2016-02-11 17:08:29.031795451+0000
	Modify: 2016-02-11 17:08:29.031795451+0000
	Change: 2016-02-11 17:11:11.987790114+0000
	 Birth: 2016-02-11 17:08:29.031795451+0000
	Attributes: 0000000000000030 (-------- -------- -------- -------- -------- -------- -------- --ai----)

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:58 -04:00
Eric Biggers
64bd72048a statx: optimize copy of struct statx to userspace
I found that statx() was significantly slower than stat().  As a
microbenchmark, I compared 10,000,000 invocations of fstat() on a tmpfs
file to the same with statx() passed a NULL path:

	$ time ./stat_benchmark

	real	0m1.464s
	user	0m0.275s
	sys	0m1.187s

	$ time ./statx_benchmark

	real	0m5.530s
	user	0m0.281s
	sys	0m5.247s

statx is expected to be a little slower than stat because struct statx
is larger than struct stat, but not by *that* much.  It turns out that
most of the overhead was in copying struct statx to userspace, mostly in
all the stac/clac instructions that got generated for each __put_user()
call.  (This was on x86_64, but some other architectures, e.g. arm64,
have something similar now too.)

stat() instead initializes its struct on the stack and copies it to
userspace with a single call to copy_to_user().  This turns out to be
much faster, and changing statx to do this makes it almost as fast as
stat:

	$ time ./statx_benchmark

	real	0m1.624s
	user	0m0.270s
	sys	0m1.354s

For zeroing the reserved fields, start by zeroing the full struct with
memset.  This makes it clear that every byte copied to userspace is
initialized, even implicit padding bytes (though there are none
currently).  In the scenarios I tested, it also performed the same as a
designated initializer.  Manually initializing each field was still
slightly faster, but would have been more error-prone and less
verifiable.

Also rename statx_set_result() to cp_statx() for consistency with
cp_old_stat() et al., and make it noinline so that struct statx doesn't
add to the stack usage during the main portion of the syscall execution.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:57 -04:00
Eric Biggers
b15fb70b82 statx: remove incorrect part of vfs_statx() comment
request_mask and query_flags are function arguments, not passed in
struct kstat.  So remove the part of the comment which claims otherwise.
This was apparently left over from an earlier version of the statx
patch.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:57 -04:00
Eric Biggers
8c7493aa3e statx: reject unknown flags when using NULL path
The statx() system call currently accepts unknown flags when called with
a NULL path to operate on a file descriptor.  Left unchanged, this could
make it hard to introduce new query flags in the future, since
applications may not be able to tell whether a given flag is supported.

Fix this by failing the system call with EINVAL if any flags other than
KSTAT_QUERY_FLAGS are specified in combination with a NULL path.

Arguably, we could still permit known lookup-related flags such as
AT_SYMLINK_NOFOLLOW.  However, that would be inconsistent with how
sys_utimensat() behaves when passed a NULL path, which seems to be the
closest precedent.  And given that the NULL path case is (I believe)
mainly intended to be used to implement a wrapper function like fstatx()
that doesn't have a path argument, I think rejecting lookup-related
flags too is probably the best choice.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:56 -04:00
Eric Biggers
75dd7e4bb6 Documentation/filesystems: fix documentation for ->getattr()
Following the recent merge of statx, correct the documented prototype
for the ->getattr() inode operation, and add an entry to the porting
file.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-03 01:05:56 -04:00
Peter Senna Tschudin
a68ee76f4a drm/bridge: megachips-stdpxxxx-ge-b850v3-fw: Fix bridge initialization
Reordering of the device nodes based on unit address resulted in
ge_b850v3_lvds_attach() being called before
ge_b850v3_lvds_ptr->stdp4028_i2c was populated.

This patch moves the drm bridge initialization from
ge_b850v3_lvds_init() to stdp4028_ge_b850v3_fw_probe() ensuring that
ge_b850v3_lvds_ptr->stdp4028_i2c is properly populated.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170330081928.8537-1-peter.senna@collabora.com
2017-04-03 09:58:05 +05:30
Tobias Klauser
921d701e6f nios2: reserve boot memory for device tree
Make sure to reserve the boot memory for the flattened device tree.
Otherwise it might get overwritten, e.g. when initial_boot_params is
copied, leading to a corrupted FDT and a boot hang/crash:

  bootconsole [early0] enabled
  Early console on uart16650 initialized at 0xf8001600
  OF: fdt: Error -11 processing FDT
  Kernel panic - not syncing: setup_cpuinfo: No CPU found in devicetree!

  ---[ end Kernel panic - not syncing: setup_cpuinfo: No CPU found in devicetree!

Guenter Roeck says:

> I think I found the problem. In unflatten_and_copy_device_tree(), with added
> debug information:
>
> OF: fdt: initial_boot_params=c861e400, dt=c861f000 size=28874 (0x70ca)
>
> ... and then initial_boot_params is copied to dt, which results in corrupted
> fdt since the memory overlaps. Looks like the initial_boot_params memory
> is not reserved and (re-)allocated by early_init_dt_alloc_memory_arch().

Cc: stable@vger.kernel.org
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reference: http://lkml.kernel.org/r/20170226210338.GA19476@roeck-us.net
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
2017-04-02 20:13:57 -07:00
Grygorii Strashko
75514b6654 net: ethernet: ti: cpsw: wake tx queues on ndo_tx_timeout
In case, if TX watchdog is fired some or all netdev TX queues will be
stopped and as part of recovery it is required not only to drain and
reinitailize CPSW TX channeles, but also wake up stoppted TX queues what
doesn't happen now and netdevice will stop transmiting data until
reopenned.

Hence, add netif_tx_wake_all_queues() call in .ndo_tx_timeout() to complete
recovery and restore TX path.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:42:44 -07:00
David S. Miller
d4f4b91582 Merge branch 'rds-minor-bug-fixes'
Sowmini Varadhan says:

====================
rds: tcp: couple of minor bug fixes

A couple of minor bugfixes that showed up during testing
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:41:01 -07:00
Sowmini Varadhan
087d975353 rds: tcp: canonical connection order for all paths with index > 0
The rds_connect_worker() has a bug in the check that enforces the
canonical connection order described in the comments of
rds_tcp_state_change(). The intention is to make sure that all
the multipath connections are always initiated by the smaller IP
address via rds_start_mprds. To achieve this, rds_connection_worker
should check that cp_index > 0.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:41:00 -07:00
Sowmini Varadhan
e97656d03c rds: tcp: allow progress of rds_conn_shutdown if the rds_connection is marked ERROR by an intervening FIN
rds_conn_shutdown() runs in workq context, and marks the rds_connection
as DISCONNECTING before quiescing Tx/Rx paths. However, after all I/O
has quiesced, we may still find the rds_connection state to be
RDS_CONN_ERROR if an intervening FIN was processed in softirq context.

This is not a fatal error: rds_conn_shutdown() should continue the
shutdown, and there is no need to log noisy messages about this event.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:41:00 -07:00
Eric Dumazet
d3fbff306c sock: correctly test SOCK_TIMESTAMP in sock_recv_ts_and_drops()
It seems the code does not match the intent.

This broke packetdrill, and probably other programs.

Fixes: 6c7c98bad4 ("sock: avoid dirtying sk_stamp, if possible")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:34:55 -07:00
Andrew Morton
e270e96686 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c: fix build with gcc-4.4.4
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c: In function 'mlx5e_set_rxfh':
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: warning: missing braces around initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: warning: (near initialization for 'rrp.<anonymous>')
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1068: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1069: warning: excess elements in struct initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1069: warning: (near initialization for 'rrp')

gcc-4.4.4 has issues with anonymous union initializers.  Work around this.

Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-02 19:32:57 -07:00