deliverable/linux.git
7 years agodoc-rst: linux_tv DocBook to reST migration (docs-next)
Markus Heiser [Thu, 30 Jun 2016 13:18:56 +0000 (15:18 +0200)] 
doc-rst: linux_tv DocBook to reST migration (docs-next)

This is the restructuredText (reST) migration of the ``media``
DocBook-XML set from the linux_tv project.

Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
7 years agoMerge branch 'docs-next' of git://git.lwn.net/linux into devel/docs-next
Mauro Carvalho Chehab [Thu, 30 Jun 2016 19:10:47 +0000 (16:10 -0300)] 
Merge branch 'docs-next' of git://git.lwn.net/linux into devel/docs-next

* 'docs-next' of git://git.lwn.net/linux: (64 commits)
  Add .pyc files to .gitignore
  Doc: PM: Fix a typo in intel_powerclamp.txt
  doc-rst: flat-table directive - initial implementation
  Documentation: add meta-documentation for Sphinx and kernel-doc
  Documentation: tiny typo fix in usb/gadget_multi.txt
  Documentation: fix wrong value in md.txt
  bcache: documentation formatting, edited for clarity, stripe alignment notes
  bcache: documentation updates and corrections
  Documentation: add top level 'make help' output for Sphinx
  Documentation/sphinx: drop modindex, we don't have python modules
  Documentation/sphinx: add support for specifying extra export files
  Documentation/sphinx: use a more sensible string split in kernel-doc extension
  Documentation/sphinx: remove unnecessary temporary variable
  kernel-doc: unify all EXPORT_SYMBOL scanning to one place
  kernel-doc: add support for specifying extra files for EXPORT_SYMBOLs
  kernel-doc: abstract filename mapping
  kernel-doc: add missing semi-colons in option parsing
  kernel-doc: do not warn about duplicate default section names
  kernel-doc: remove old debug cruft from dump_section()
  docs: kernel-doc: Add "example" and "note" to the magic section types
  ...

7 years agoAdd .pyc files to .gitignore
Jonathan Corbet [Thu, 30 Jun 2016 19:07:33 +0000 (13:07 -0600)] 
Add .pyc files to .gitignore

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
7 years agoDoc: PM: Fix a typo in intel_powerclamp.txt
Masanari Iida [Wed, 29 Jun 2016 09:05:56 +0000 (18:05 +0900)] 
Doc: PM: Fix a typo in intel_powerclamp.txt

This patch fix a spelling typo in intel_powerclamp.txt

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
7 years agodoc-rst: flat-table directive - initial implementation
Markus Heiser [Thu, 30 Jun 2016 12:00:22 +0000 (14:00 +0200)] 
doc-rst: flat-table directive - initial implementation

Implements the reST flat-table directive.

The ``flat-table`` is a double-stage list similar to the ``list-table`` with
some additional features:

* column-span: with the role ``cspan`` a cell can be extended through
  additional columns

* row-span: with the role ``rspan`` a cell can be extended through
  additional rows

* auto span rightmost cell of a table row over the missing cells on the right
  side of that table-row.  With Option ``:fill-cells:`` this behavior can
  changed from *auto span* to *auto fill*, which automaticly inserts (empty)

list tables

  The *list tables* formats are double stage lists. Compared to the
  ASCII-art they migth be less comfortable for readers of the
  text-files. Their advantage is, that they are easy to create/modify
  and that the diff of a modification is much more meaningfull, because
  it is limited to the modified content.

The initial implementation was taken from the sphkerneldoc project [1]

[1] https://github.com/return42/sphkerneldoc/commits/master/scripts/site-python/linuxdoc/rstFlatTable.py

Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de>
[jc: fixed typos and misspellings in the docs]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years ago[media] videodev2.h: Fix V4L2_PIX_FMT_YUV411P description
Laurent Pinchart [Wed, 15 Jun 2016 23:35:36 +0000 (20:35 -0300)] 
[media] videodev2.h: Fix V4L2_PIX_FMT_YUV411P description

YUV 4:1:1 uses 12 bits per pixel on average, not 16.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] videodev2.h: Group YUV 3 planes formats together
Laurent Pinchart [Wed, 15 Jun 2016 23:27:58 +0000 (20:27 -0300)] 
[media] videodev2.h: Group YUV 3 planes formats together

The formats are interleaved with the YUV packed and miscellaneous
formats, making the result confusing especially with the YUV444 format
being packed and not planar like YUV410 or YUV420. Move them to their
own group as the 2 planes or 3 non-contiguous planes formats to clarify
the header.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: rcar-vin: add DV timings support
Ulrich Hecht [Wed, 11 May 2016 14:02:53 +0000 (11:02 -0300)] 
[media] media: rcar-vin: add DV timings support

Adds ioctls DV_TIMINGS_CAP, ENUM_DV_TIMINGS, G_DV_TIMINGS, S_DV_TIMINGS,
and QUERY_DV_TIMINGS.

Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: rcar_vin: Use correct pad number in try_fmt
Ulrich Hecht [Wed, 11 May 2016 14:02:51 +0000 (11:02 -0300)] 
[media] media: rcar_vin: Use correct pad number in try_fmt

Fix rcar_vin_try_fmt's use of an inappropriate pad number when calling
the subdev set_fmt function - for the ADV7612, IDs should be non-zero.

Signed-off-by: William Towle <william.towle@codethink.co.uk>
Reviewed-by: Rob Taylor <rob.taylor@codethink.co.uk>
[ulrich.hecht+renesas@gmail.com: adapted to rcar-vin rewrite]
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: rcar-vin: pad-aware driver initialisation
Ulrich Hecht [Wed, 11 May 2016 14:02:52 +0000 (11:02 -0300)] 
[media] media: rcar-vin: pad-aware driver initialisation

Add detection of source pad number for drivers aware of the media controller
API, so that rcar-vin can create device nodes to support modern drivers such
as adv7604.c (for HDMI on Lager) and the converted adv7180.c (for composite)
underneath.

Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
line with requirements for building the drivers associated with it.

Signed-off-by: William Towle <william.towle@codethink.co.uk>
Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
[ulrich.hecht+renesas@gmail.com: adapted to rcar-vin rewrite]
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l2-ctrl.h: fix comments
Hans Verkuil [Wed, 15 Jun 2016 12:57:48 +0000 (09:57 -0300)] 
[media] v4l2-ctrl.h: fix comments

The comments for the unlocked v4l2_ctrl_s_ctrl* functions were wrong (copy
and pasted from the locked variants). Fix this, since it is confusing.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] radio-maxiradio: fix memory leak when device is removed
Alexey Khoroshilov [Fri, 3 Jun 2016 22:33:06 +0000 (19:33 -0300)] 
[media] radio-maxiradio: fix memory leak when device is removed

Memory allocated for maxiradio device is not deallocated when
the device is removed.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] stk1160: Check *nplanes in queue_setup
Helen Fornazier [Tue, 10 May 2016 03:06:14 +0000 (00:06 -0300)] 
[media] stk1160: Check *nplanes in queue_setup

If *nplanes is not zero, it should use the requested size if valid

Signed-off-by: Helen Koike <helen.koike@collabora.co.uk>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] solo6x10: Simplify solo_enum_ext_input
Ismael Luceno [Wed, 4 May 2016 16:21:21 +0000 (13:21 -0300)] 
[media] solo6x10: Simplify solo_enum_ext_input

Additionally, now it specifies which channels it's showing.

Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] adv7604: Don't ignore pad number in subdev DV timings pad operations
Laurent Pinchart [Tue, 24 May 2016 11:53:39 +0000 (08:53 -0300)] 
[media] adv7604: Don't ignore pad number in subdev DV timings pad operations

The dv_timings_cap() and enum_dv_timings() pad operations take a pad
number as an input argument and return the DV timings capabilities and
list of supported DV timings for that pad.

Commit bd3e275f3ec0 ("[media] media: i2c: adv7604: Use v4l2-dv-timings
helpers") broke this as it started ignoring the pad number, always
returning the information associated with the currently selected input.
Fix it.

Fixes: bd3e275f3ec0 ("[media] media: i2c: adv7604: Use v4l2-dv-timings helpers")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Add V4L2 controls for AEC and AGC
Markus Pargmann [Mon, 14 Dec 2015 14:41:53 +0000 (12:41 -0200)] 
[media] v4l: mt9v032: Add V4L2 controls for AEC and AGC

This patch adds V4L2 controls for Auto Exposure Control and Auto Gain
Control settings. These settings include low pass filter, update
frequency of these settings and the update interval for those units.

[Avoid forward declarations]
[Fix 80 columns limit violation]
[Rename controls to avoid underscores in names]
[Fix the AEC maximum shutter width on MT9V032]

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Do not unset master_mode
Markus Pargmann [Mon, 14 Dec 2015 14:41:52 +0000 (12:41 -0200)] 
[media] v4l: mt9v032: Do not unset master_mode

The power_on function of the driver resets the chip and sets the
CHIP_CONTROL register to 0. This switches the operating mode to slave.
The s_stream function sets the correct mode. But this caused problems on
a board where the camera chip is operated as master. The camera started
after a random amount of time streaming an image, I observed between 10
and 300 seconds.

The STRFM_OUT and STLN_OUT pins are not connected on this board which
may cause some issues in slave mode. I could not find any documentation
about this.

Keeping the chip in master mode after the reset helped to fix this
issue for me.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Remove duplicate test for I2C_FUNC_SMBUS_WORD_DATA functionality
Axel Lin [Sun, 10 Aug 2014 09:41:49 +0000 (06:41 -0300)] 
[media] v4l: mt9v032: Remove duplicate test for I2C_FUNC_SMBUS_WORD_DATA functionality

Since commit b42261078a91 ("regmap: i2c: fallback to SMBus if the adapter
does not support standard I2C"), regmap-i2c will check the
I2C_FUNC_SMBUS_[BYTE|WORD]_DATA functionality based on the regmap_config
setting if the adapter does not support standard I2C.

So remove the I2C_FUNC_SMBUS_WORD_DATA functionality check in the driver code.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Remove unneeded header
Laurent Pinchart [Mon, 9 Nov 2015 14:36:48 +0000 (12:36 -0200)] 
[media] v4l: mt9v032: Remove unneeded header

The of_gpio.h header isn't needed, don't include it.

Reported-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9t001: fix clean up in case of power-on failures
Guennadi Liakhovetski [Mon, 14 Dec 2015 09:58:29 +0000 (07:58 -0200)] 
[media] v4l: mt9t001: fix clean up in case of power-on failures

If the driver fails to reset the camera or to set up control handlers, it
has to power the camera back off.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9t001: constify v4l2_subdev_internal_ops structure
Julia Lawall [Sun, 11 Oct 2015 11:57:13 +0000 (08:57 -0300)] 
[media] v4l: mt9t001: constify v4l2_subdev_internal_ops structure

This v4l2_subdev_internal_ops structure is never modified.  All other
v4l2_subdev_internal_ops structures are declared as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] smiapp: Remove useless rval assignment in smiapp_get_pdata()
Sakari Ailus [Fri, 10 Apr 2015 22:42:47 +0000 (19:42 -0300)] 
[media] smiapp: Remove useless rval assignment in smiapp_get_pdata()

The value is not used after the assignment.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: be explicit about the possible dma_mode options
Hans Verkuil [Mon, 27 Jun 2016 08:28:59 +0000 (05:28 -0300)] 
[media] tw686x: be explicit about the possible dma_mode options

Users won't know what to put in this module option if it isn't
described.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Prevent hw param changes while busy
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:20 +0000 (20:47 -0300)] 
[media] tw686x: audio: Prevent hw param changes while busy

Audio hw params are shared across all DMA channels,
so if the user changes any of these while any DMA channel is
enabled, it will impact the enabled channels, potentially causing
serious instability issues.

This commit avoids such situation, by preventing any hw param
change (on any DMA channel) if any other DMA audio channel is capturing.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Allow to configure the period size
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:19 +0000 (20:47 -0300)] 
[media] tw686x: audio: Allow to configure the period size

Currently, the driver has a fixed period size of 4096 bytes
(2048 frames). Since this hardware can configure the audio
capture size, this commit allows a period size range of [512-4096].

This is very useful to reduce the audio latency.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Implement non-memcpy capture
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:18 +0000 (20:47 -0300)] 
[media] tw686x: audio: Implement non-memcpy capture

Now that we've introduced the dma_mode parameter to pick the
DMA operation, let's use it to also select the audio DMA
operation.

When dma_mode != memcpy, the driver will avoid using memcpy
in the audio capture path, and the DMA hardware operation
will act directly on the ALSA buffers.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Add support for DMA scatter-gather mode
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:17 +0000 (20:47 -0300)] 
[media] tw686x: Add support for DMA scatter-gather mode

Now that the driver has the infrastructure to support more
DMA modes, let's add the DMA scatter-gather mode.

In this mode, the device delivers sequential top-bottom
frames. The scatter-gather logic is based on staging's
tw686x-kh driver (by Krzysztof Ha?asa).

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Add support for DMA contiguous interlaced frame mode
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:16 +0000 (20:47 -0300)] 
[media] tw686x: Add support for DMA contiguous interlaced frame mode

Now that the driver has the infrastructure to support more
DMA modes, let's add the DMA contiguous interlaced frame mode.

In this mode, the DMA P and B buffers are programmed with
the user-provided buffers. When a P (or B) frame is ready,
a new buffer is dequeued into P (or B).

In addition to interlaced fields, the device can also be
programmed to deliver alternate fields. Only interlaced
mode is supported for now.

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Introduce an interface to support multiple DMA modes
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:15 +0000 (20:47 -0300)] 
[media] tw686x: Introduce an interface to support multiple DMA modes

Let's set the corner stone to support all the DMA modes
available on this device.

For stability reasons, the driver is currently setting DMA frame
mode, and using single DMA buffers to get the P and B buffers.
Each frame is then memcpy'ed into the user buffer.

However, other platforms might be interested in avoiding this
memcpy, or in taking advantage of the chip's DMA scatter-gather
capabilities.

To achieve this, this commit introduces a "dma_mode" module parameter,
and a tw686x_dma_ops struct. This will allow to define functions to
alloc/free DMA buffers, and to return the frames to userspace.

The memcpy-based method described above is named as dma_mode="memcpy".
Current alloc/free functions are renamed as tw686x_memcpy_xxx,
and are now used through a memcpy_dma_ops.

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agobdisp: move the V/H filter spec to bdisp-hw.c
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:27:51 +0000 (12:27 -0300)] 
bdisp: move the V/H filter spec to bdisp-hw.c

Those structs are used only at bdisp-hw, so they shouldn't be
there in a header file that it is used elsewhere.

This fixes the following Gcc 6.1 warnings:

In file included from drivers/media/platform/sti/bdisp/bdisp-debug.c:11:0:
drivers/media/platform/sti/bdisp/bdisp-filter.h:207:65: warning: ‘bdisp_v_spec’ defined but not used [-Wunused-const-variable=]
 static const struct __maybe_unused bdisp_filter_v_spec bdisp_v_spec[] = {
                                                                 ^~~~~~~~~
In file included from drivers/media/platform/sti/bdisp/bdisp-debug.c:11:0:
drivers/media/platform/sti/bdisp/bdisp-filter.h:23:65: warning: ‘bdisp_h_spec’ defined but not used [-Wunused-const-variable=]
 static const struct __maybe_unused bdisp_filter_h_spec bdisp_h_spec[] = {
                                                                 ^~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoadv7842: comment out a table useful for debug
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:17:27 +0000 (12:17 -0300)] 
adv7842: comment out a table useful for debug

Gcc 6.1 warns about an unused table:

drivers/media/i2c/adv7842.c:2400:27: warning: 'prim_mode_txt' defined but not used [-Wunused-const-variable=]
 static const char * const prim_mode_txt[] = {
                           ^~~~~~~~~~~~~

That seems to be useful for debug, and likely were used before.
While we could simply remove, let's comment it out, for now.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoem28xx-dvb: remove some left over
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:10:55 +0000 (12:10 -0300)] 
em28xx-dvb: remove some left over

Gcc 6.1 warns about an unused table:

drivers/media/usb/em28xx/em28xx-dvb.c:907:38: warning: 'pctv_461e_m88ds3103_config' defined but not used [-Wunused-const-variable=]
 static const struct m88ds3103_config pctv_461e_m88ds3103_config = {
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~

That's a left over of patch 76b91be3d360a ('em28xx: PCTV 461e use I2C
client for demod and SEC').

Remove the dead code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agovivid: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:09:49 +0000 (12:09 -0300)] 
vivid: remove some unused vars

Gcc 6.1 warns about some unused vars. Remove them:
drivers/media/platform/vivid/vivid-vid-cap.c:40:2: warning: 'tpf_default' defined but not used [-Wunused-const-variable=]
  tpf_default = {.numerator = 1,  .denominator = 30};
  ^~~~~~~~~~~
drivers/media/platform/vivid/vivid-sdr-cap.c:54:27: warning: 'NUM_FORMATS' defined but not used [-Wunused-const-variable=]
 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
                           ^~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agozr36016: remove some unused tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:02:11 +0000 (12:02 -0300)] 
zr36016: remove some unused tables

Gcc 6.1 warns about some unused tables:

drivers/media/pci/zoran/zr36016.c:251:18: warning: 'zr016_yoff' defined but not used [-Wunused-const-variable=]
 static const int zr016_yoff[] = { 8, 9, 7 };
                  ^~~~~~~~~~
drivers/media/pci/zoran/zr36016.c:250:18: warning: 'zr016_xoff' defined but not used [-Wunused-const-variable=]
 static const int zr016_xoff[] = { 20, 20, 20 };
                  ^~~~~~~~~~

Those tables aren't used anywere. So, remove them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agor820t: comment out two ancillary tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:00:02 +0000 (12:00 -0300)] 
r820t: comment out two ancillary tables

As Gcc6.1 warned, those tables are currently unused:
drivers/media/tuners/r820t.c:349:18: warning: 'r820t_mixer_gain_steps' defined but not used [-Wunused-const-variable=]
 static const int r820t_mixer_gain_steps[]  = {
                  ^~~~~~~~~~~~~~~~~~~~~~
drivers/media/tuners/r820t.c:345:18: warning: 'r820t_lna_gain_steps' defined but not used [-Wunused-const-variable=]
 static const int r820t_lna_gain_steps[]  = {
                  ^~~~~~~~~~~~~~~~~~~~

They're actually used only by a routine that it is currently
commented out. So, move those tables to be together with such
code and comment them out.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agodib0090: comment out the unused tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 14:12:17 +0000 (11:12 -0300)] 
dib0090: comment out the unused tables

Those tables are currently unused, so comment them out:

drivers/media/dvb-frontends/dib0090.c:852:18: warning: 'rf_ramp_pwm_sband' defined but not used [-Wunused-const-variable=]
 static const u16 rf_ramp_pwm_sband[] = {
                  ^~~~~~~~~~~~~~~~~
drivers/media/dvb-frontends/dib0090.c:800:18: warning: 'bb_ramp_pwm_boost' defined but not used [-Wunused-const-variable=]
 static const u16 bb_ramp_pwm_boost[] = {
                  ^~~~~~~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agodrxj: comment out the unused nicam_presc_table_val table
Mauro Carvalho Chehab [Fri, 24 Jun 2016 14:10:16 +0000 (11:10 -0300)] 
drxj: comment out the unused nicam_presc_table_val table

Avoid this warning:

drivers/media/dvb-frontends/drx39xyj/drxj.c:1243:18: warning: 'nicam_presc_table_val' defined but not used [-Wunused-const-variable=]
 static const u16 nicam_presc_table_val[43] = {
                  ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoDocumentation: add meta-documentation for Sphinx and kernel-doc
Jani Nikula [Thu, 23 Jun 2016 12:36:04 +0000 (15:36 +0300)] 
Documentation: add meta-documentation for Sphinx and kernel-doc

Describe Sphinx, reStructuredText, the kernel-doc extension, the
kernel-doc structured documentation comments, etc.

The kernel-doc parts are based on kernel-doc-nano-HOWTO.txt, by Tim
<twaugh@redhat.com>.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agocx25821-alsa: shutup a Gcc 6.1 warning
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:46:54 +0000 (09:46 -0300)] 
cx25821-alsa: shutup a Gcc 6.1 warning

The PCI device ID table is only used if compiled with modules
support. When compiled with modules disabled, this is now
producing this bogus warning:

drivers/media/pci/cx25821/cx25821-alsa.c:696:35: warning: 'cx25821_audio_pci_tbl' defined but not used [-Wunused-const-variable=]
 static const struct pci_device_id cx25821_audio_pci_tbl[] = {
                                   ^~~~~~~~~~~~~~~~~~~~~

Fix it by annotating that the function may not be used.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_ov7660: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:37:43 +0000 (09:37 -0300)] 
m5602_ov7660: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_po1030: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:36:43 +0000 (09:36 -0300)] 
m5602_po1030: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_s5k83a: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:34:20 +0000 (09:34 -0300)] 
m5602_s5k83a: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_ov9650: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:32:56 +0000 (09:32 -0300)] 
m5602_ov9650: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_mt9m111: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:30:36 +0000 (09:30 -0300)] 
m5602_mt9m111: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_s5k4aa: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:08:39 +0000 (09:08 -0300)] 
m5602_s5k4aa: move skeletons to the .c file

The mc5602_s5k4aa.h has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_core: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:03:17 +0000 (09:03 -0300)] 
m5602_core: move skeletons to the .c file

The mc5602_brigde.h is included at m5602 submodules. This
causes Gcc 6.1 to complain:

drivers/media/usb/gspca/m5602/m5602_bridge.h:124:28: warning: 'sensor_urb_skeleton' defined but not used [-Wunused-const-variable=]
 static const unsigned char sensor_urb_skeleton[] = {
                            ^~~~~~~~~~~~~~~~~~~
drivers/media/usb/gspca/m5602/m5602_bridge.h:119:28: warning: 'bridge_urb_skeleton' defined but not used [-Wunused-const-variable=]
 static const unsigned char bridge_urb_skeleton[] = {
                           ^~~~~~~~~~~~~~~~~~~

Let's shut up gcc 6.1 warnings by moving those data structures
to the core, as they're used only there.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agocx18: use macros instead of static const vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:40:51 +0000 (08:40 -0300)] 
cx18: use macros instead of static const vars

Gcc 6.1 now complains about unused vars:

drivers/media/pci/cx18/cx18-driver.h:497:18: warning: 'vbi_hblank_samples_50Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_50Hz = 284; /* 4 byte EAV + 280 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:496:18: warning: 'vbi_hblank_samples_60Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_60Hz = 272; /* 4 byte EAV + 268 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/media/pci/cx18/cx18-cards.c:25:0:
drivers/media/pci/cx18/cx18-driver.h:497:18: warning: 'vbi_hblank_samples_50Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_50Hz = 284; /* 4 byte EAV + 280 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:496:18: warning: 'vbi_hblank_samples_60Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_60Hz = 272; /* 4 byte EAV + 268 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:495:18: warning: 'vbi_active_samples' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_active_samples = 1444; /* 4 byte SAV + 720 Y + 720 U/V */
                  ^~~~~~~~~~~~~~~~~~

In this specific case, this is somewhat intentional, as those
values are actually used in parts of the driver. The code assumes
that gcc optimizer it and not actually create any var, but convert
it to immediate access at the routines.

Yet, as we want to shut up gcc warnings, let's use #define, with
is the standard way to store values that will use assembler's
immediate access code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoexynos4-is: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:32:07 +0000 (08:32 -0300)] 
exynos4-is: remove some unused vars

Gcc 6.1 warns about some unused vars and functions. Remove them:

drivers/media/platform/exynos4-is/mipi-csis.c:665:46: warning: 's5pcsis_sd_internal_ops' defined but not used [-Wunused-const-variable=]
 static const struct v4l2_subdev_internal_ops s5pcsis_sd_internal_ops = {
                                              ^~~~~~~~~~~~~~~~~~~~~~~

drivers/media/platform/exynos4-is/mipi-csis.c:652:12: warning: 's5pcsis_open' defined but not used [-Wunused-function]
 static int s5pcsis_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
            ^~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agousbvision: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:30:15 +0000 (08:30 -0300)] 
usbvision: remove some unused vars

Gcc 6.1 warns about some unused vars. Remove them:

drivers/media/usb/usbvision/usbvision-core.c:94:18: warning: 'min_imgheight' defined but not used [-Wunused-const-variable=]
 static const int min_imgheight = MIN_FRAME_HEIGHT;
                  ^~~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:93:18: warning: 'min_imgwidth' defined but not used [-Wunused-const-variable=]
 static const int min_imgwidth = MIN_FRAME_WIDTH;
                  ^~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:92:18: warning: 'max_imgheight' defined but not used [-Wunused-const-variable=]
 static const int max_imgheight = MAX_FRAME_HEIGHT;
                  ^~~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:91:18: warning: 'max_imgwidth' defined but not used [-Wunused-const-variable=]
 static const int max_imgwidth = MAX_FRAME_WIDTH;
                  ^~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoDocumentation: tiny typo fix in usb/gadget_multi.txt
Michal Nazarewicz [Sat, 11 Jun 2016 00:56:37 +0000 (02:56 +0200)] 
Documentation: tiny typo fix in usb/gadget_multi.txt

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agoDocumentation: fix wrong value in md.txt
Tiezhu Yang [Fri, 17 Jun 2016 01:40:02 +0000 (09:40 +0800)] 
Documentation: fix wrong value in md.txt

In the current Documentation/md.txt, the lower limit value of
stripe_cache_size is 16 and the default value is 128, but when
I update kernel to the latest mainline version and RAID5 array
is created by mdadm, then execute the following commands, it
shows an error and a difference respectively.

1) set stripe_cache_size to 16
[root@localhost ~]# echo 16 > /sys/block/md0/md/stripe_cache_size
bash: echo: write error: Invalid argument
2) read the default value of stripe_cache_size
[root@localhost ~]# cat /sys/block/md0/md/stripe_cache_size
256

I read drivers/md/raid5.c and find the following related code:
1) in function 'raid5_set_cache_size':
if (size <= 16 || size > 32768)
return -EINVAL;
2) #define NR_STRIPES 256

So the lower limit value of stripe_cache_size should be 17 and
the default value should be 256.

Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agobcache: documentation formatting, edited for clarity, stripe alignment notes
Eric Wheeler [Sat, 12 Mar 2016 07:43:47 +0000 (23:43 -0800)] 
bcache: documentation formatting, edited for clarity, stripe alignment notes

Signed-off-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Marc MERLIN <marc@merlins.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agobcache: documentation updates and corrections
Marc MERLIN [Sat, 12 Mar 2016 07:04:19 +0000 (23:04 -0800)] 
bcache: documentation updates and corrections

Bcache documentation updates:
- Added new HOWTO/COOKBOOK section
- fixed a few typos
- /sys/block/bcache0/cache_mode is /sys/block/bcache0/bcache/cache_mode

Signed-off-by: Marc MERLIN <marc@merlins.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agoDocumentation: add top level 'make help' output for Sphinx
Jani Nikula [Wed, 22 Jun 2016 12:41:48 +0000 (15:41 +0300)] 
Documentation: add top level 'make help' output for Sphinx

While there's slight overlap with the DocBook help now, this can stay
intact when the DocBook help goes away.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: drop modindex, we don't have python modules
Jani Nikula [Wed, 22 Jun 2016 12:14:15 +0000 (15:14 +0300)] 
Documentation/sphinx: drop modindex, we don't have python modules

The modindex is for python modules.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years ago[media] media-devnode.h: Fix documentation
Mauro Carvalho Chehab [Thu, 16 Jun 2016 11:04:40 +0000 (08:04 -0300)] 
[media] media-devnode.h: Fix documentation

Two parameters were documented with a wrong name, and a struct
device pointer description was missing.

That caused the following warnings, when building documentation:

include/media/media-devnode.h:102: warning: No description found for parameter 'media_dev'
include/media/media-devnode.h:126: warning: No description found for parameter 'mdev'
include/media/media-devnode.h:126: warning: Excess function parameter 'media_dev' description in 'media_devnode_register'

Rename the description, to match the function parameter and fix
Documentation.

No funcional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] rcar-vin: get rid of an unused var
Mauro Carvalho Chehab [Thu, 16 Jun 2016 10:44:42 +0000 (07:44 -0300)] 
[media] rcar-vin: get rid of an unused var

drivers/media/platform/rcar-vin/rcar-core.c: In function 'rvin_graph_notify_complete':
drivers/media/platform/rcar-vin/rcar-core.c:65:22: warning: variable 'sd' set but not used [-Wunused-but-set-variable]
  struct v4l2_subdev *sd;
                      ^

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] rcar-vin: add Renesas R-Car VIN driver
Niklas Söderlund [Tue, 26 Apr 2016 13:22:19 +0000 (10:22 -0300)] 
[media] rcar-vin: add Renesas R-Car VIN driver

A V4L2 driver for Renesas R-Car VIN driver that do not depend on
soc_camera. The driver is heavily based on its predecessor and aims to
replace it.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] videobuf2-v4l2: Verify planes array in buffer dequeueing
Sakari Ailus [Sun, 3 Apr 2016 19:31:03 +0000 (16:31 -0300)] 
[media] videobuf2-v4l2: Verify planes array in buffer dequeueing

When a buffer is being dequeued using VIDIOC_DQBUF IOCTL, the exact buffer
which will be dequeued is not known until the buffer has been removed from
the queue. The number of planes is specific to a buffer, not to the queue.

This does lead to the situation where multi-plane buffers may be requested
and queued with n planes, but VIDIOC_DQBUF IOCTL may be passed an argument
struct with fewer planes.

__fill_v4l2_buffer() however uses the number of planes from the dequeued
videobuf2 buffer, overwriting kernel memory (the m.planes array allocated
in video_usercopy() in v4l2-ioctl.c)  if the user provided fewer
planes than the dequeued buffer had. Oops!

Fixes: b0e0e1f83de3 ("[media] media: videobuf2: Prepare to divide videobuf2")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] vb2: core: Skip planes array verification if pb is NULL
Sakari Ailus [Wed, 11 May 2016 21:44:32 +0000 (18:44 -0300)] 
[media] vb2: core: Skip planes array verification if pb is NULL

An earlier patch fixing an input validation issue introduced another
issue: vb2_core_dqbuf() is called with pb argument value NULL in some
cases, causing a NULL pointer dereference. Fix this by skipping the
verification as there's nothing to verify.

Fixes: e7e0c3e26587 ("[media] videobuf2-core: Check user space planes array in dqbuf")
Signed-off-by: David R <david@unsolicited.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: fix media devnode ioctl/syscall and unregister race
Shuah Khan [Fri, 10 Jun 2016 17:37:23 +0000 (14:37 -0300)] 
[media] media: fix media devnode ioctl/syscall and unregister race

Media devnode open/ioctl could be in progress when media device unregister
is initiated. System calls and ioctls check media device registered status
at the beginning, however, there is a window where unregister could be in
progress without changing the media devnode status to unregistered.

process 1 process 2
fd = open(/dev/media0)
media_devnode_is_registered()
(returns true here)

media_device_unregister()
(unregister is in progress
and devnode isn't
unregistered yet)
...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
(returns true here)
...
media_devnode_unregister()
...
(driver releases the media device
memory)

media_device_ioctl()
(By this point
devnode->media_dev does not
point to allocated memory.
use-after free in in mutex_lock_nested)

BUG: KASAN: use-after-free in mutex_lock_nested+0x79c/0x800 at addr
ffff8801ebe914f0

Fix it by clearing register bit when unregister starts to avoid the race.

process 1                               process 2
fd = open(/dev/media0)
media_devnode_is_registered()
        (could return true here)

                                        media_device_unregister()
                                                (clear the register bit,
 then start unregister.)
                                        ...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
        (return false here, ioctl
 returns I/O error, and
 will not access media
 device memory)
                                        ...
                                        media_devnode_unregister()
                                        ...
                                        (driver releases the media device
 memory)

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: fix use-after-free in cdev_put() when app exits after driver unbind
Shuah Khan [Wed, 4 May 2016 19:48:28 +0000 (16:48 -0300)] 
[media] media: fix use-after-free in cdev_put() when app exits after driver unbind

When driver unbinds while media_ioctl is in progress, cdev_put() fails with
when app exits after driver unbinds.

Add devnode struct device kobj as the cdev parent kobject. cdev_add() gets
a reference to it and releases it in cdev_del() ensuring that the devnode
is not deallocated as long as the application has the device file open.

media_devnode_register() initializes the struct device kobj before calling
cdev_add(). media_devnode_unregister() does cdev_del() and then deletes the
device. devnode is released when the last reference to the struct device is
gone.

This problem is found on uvcvideo, em28xx, and au0828 drivers and fix has
been tested on all three.

kernel: [  193.599736] BUG: KASAN: use-after-free in cdev_put+0x4e/0x50
kernel: [  193.599745] Read of size 8 by task media_device_te/1851
kernel: [  193.599792] INFO: Allocated in __media_device_register+0x54
kernel: [  193.599951] INFO: Freed in media_devnode_release+0xa4/0xc0

kernel: [  193.601083] Call Trace:
kernel: [  193.601093]  [<ffffffff81aecac3>] dump_stack+0x67/0x94
kernel: [  193.601102]  [<ffffffff815359b2>] print_trailer+0x112/0x1a0
kernel: [  193.601111]  [<ffffffff8153b5e4>] object_err+0x34/0x40
kernel: [  193.601119]  [<ffffffff8153d9d4>] kasan_report_error+0x224/0x530
kernel: [  193.601128]  [<ffffffff814a2c3d>] ? kzfree+0x2d/0x40
kernel: [  193.601137]  [<ffffffff81539d72>] ? kfree+0x1d2/0x1f0
kernel: [  193.601154]  [<ffffffff8157ca7e>] ? cdev_put+0x4e/0x50
kernel: [  193.601162]  [<ffffffff8157ca7e>] cdev_put+0x4e/0x50
kernel: [  193.601170]  [<ffffffff815767eb>] __fput+0x52b/0x6c0
kernel: [  193.601179]  [<ffffffff8117743a>] ? switch_task_namespaces+0x2a
kernel: [  193.601188]  [<ffffffff815769ee>] ____fput+0xe/0x10
kernel: [  193.601196]  [<ffffffff81170023>] task_work_run+0x133/0x1f0
kernel: [  193.601204]  [<ffffffff8117746e>] ? switch_task_namespaces+0x5e
kernel: [  193.601213]  [<ffffffff8111b50c>] do_exit+0x72c/0x2c20
kernel: [  193.601224]  [<ffffffff8111ade0>] ? release_task+0x1250/0x1250
-
-
-
kernel: [  193.601360]  [<ffffffff81003587>] ? exit_to_usermode_loop+0xe7
kernel: [  193.601368]  [<ffffffff810035c0>] exit_to_usermode_loop+0x120
kernel: [  193.601376]  [<ffffffff810061da>] syscall_return_slowpath+0x16a
kernel: [  193.601386]  [<ffffffff82848b33>] entry_SYSCALL_64_fastpath+0xa6

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media-device: dynamically allocate struct media_devnode
Mauro Carvalho Chehab [Wed, 27 Apr 2016 22:28:26 +0000 (19:28 -0300)] 
[media] media-device: dynamically allocate struct media_devnode

struct media_devnode is currently embedded at struct media_device.

While this works fine during normal usage, it leads to a race
condition during devnode unregister. the problem is that drivers
assume that, after calling media_device_unregister(), the struct
that contains media_device can be freed. This is not true, as it
can't be freed until userspace closes all opened /dev/media devnodes.

In other words, if the media devnode is still open, and media_device
gets freed, any call to an ioctl will make the core to try to access
struct media_device, with will cause an use-after-free and even GPF.

Fix this by dynamically allocating the struct media_devnode and only
freeing it when it is safe.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media-devnode: fix namespace mess
Mauro Carvalho Chehab [Wed, 23 Mar 2016 14:22:57 +0000 (11:22 -0300)] 
[media] media-devnode: fix namespace mess

Along all media controller code, "mdev" is used to represent
a pointer to struct media_device, and "devnode" for a pointer
to struct media_devnode.

However, inside media-devnode.[ch], "mdev" is used to represent
a pointer to struct media_devnode.

This is very confusing and may lead to development errors.

So, let's change all occurrences at media-devnode.[ch] to
also use "devnode" for such pointers.

This patch doesn't make any functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoUpdate my main e-mails at the Kernel tree
Mauro Carvalho Chehab [Tue, 14 Jun 2016 17:48:50 +0000 (14:48 -0300)] 
Update my main e-mails at the Kernel tree

For the third time in three years, I'm changing my e-mail at
Samsung. That's bad, as it may stop communications with me for
a while. So, this time, I'll also the mchehab@kernel.org e-mail,
as it remains stable since ever.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoDocumentation/sphinx: add support for specifying extra export files
Jani Nikula [Tue, 7 Jun 2016 09:13:56 +0000 (12:13 +0300)] 
Documentation/sphinx: add support for specifying extra export files

Let the user specify file patterns where to look for the EXPORT_SYMBOLs
in addition to the file with kernel-doc comments. This is directly based
on the -export-file FILE option added to kernel-doc in "kernel-doc: add
support for specifying extra files for EXPORT_SYMBOLs", but we extend
that with globbing patterns in the Sphinx extension.

The file patterns are added as options to the :export: and :internal:
arguments of the kernel-doc directive. For example, to extract the
documentation of exported functions from include/net/mac80211.h:

.. kernel-doc:: include/net/mac80211.h
   :export: net/mac80211/*.c

Without the file pattern, no exported functions would be found, as the
EXPORT_SYMBOLs are placed in the various source files under
net/mac80211.

The matched files are also added as dependencies on the document in
Sphinx, as they may affect the output. This is one of the reasons to do
the globbing in the Sphinx extension instead of in scripts/kernel-doc.

The file pattern remains optional, and is not needed if the kernel-doc
comments and EXPORT_SYMBOLs are placed in the source file passed in as
the main argument to the kernel-doc directive. This is the most common
case across the kernel source tree.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years ago[media] m88rs2000: initialize status to zero
Colin Ian King [Tue, 10 May 2016 05:40:22 +0000 (02:40 -0300)] 
[media] m88rs2000: initialize status to zero

status is not initialized so it can contain garbage. The
check for status containing the FE_HAS_LOCK bit may randomly pass
or fail if the read of register 0x8c fails to set status after 25
read attempts.  Fix this by initializing status to 0.

Issue found with CoverityScan, CID#986738

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure
Dan Carpenter [Mon, 9 May 2016 08:22:55 +0000 (05:22 -0300)] 
[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure

The code is checking for negative returns but it should be checking for
zero.

Fixes: aab3125c43d8 ('[media] em28xx: add support for registering multiple i2c buses')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years agoDocumentation/sphinx: use a more sensible string split in kernel-doc extension
Jani Nikula [Wed, 8 Jun 2016 07:25:40 +0000 (10:25 +0300)] 
Documentation/sphinx: use a more sensible string split in kernel-doc extension

Using the default str.split doesn't return empty strings like the
current version does.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agoDocumentation/sphinx: remove unnecessary temporary variable
Jani Nikula [Wed, 8 Jun 2016 10:38:28 +0000 (13:38 +0300)] 
Documentation/sphinx: remove unnecessary temporary variable

Leftover cruft. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: unify all EXPORT_SYMBOL scanning to one place
Jani Nikula [Tue, 7 Jun 2016 08:05:53 +0000 (11:05 +0300)] 
kernel-doc: unify all EXPORT_SYMBOL scanning to one place

Scan all input files for EXPORT_SYMBOLs along with the explicitly
specified export files before actually parsing anything.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: add support for specifying extra files for EXPORT_SYMBOLs
Jani Nikula [Tue, 7 Jun 2016 08:00:52 +0000 (11:00 +0300)] 
kernel-doc: add support for specifying extra files for EXPORT_SYMBOLs

If the kernel-doc comments for functions are not in the same file as the
EXPORT_SYMBOL statements, the -export and -internal output selections do
not work as expected. This is typically the case when the kernel-doc
comments are in header files next to the function declarations and the
EXPORT_SYMBOL statements are next to the function definitions in the
source files.

Let the user specify additional source files in which to look for the
EXPORT_SYMBOLs using the new -export-file FILE option, which may be
given multiple times.

The pathological example for this is include/net/mac80211.h, which has
all the kernel-doc documentation for the exported functions defined in a
plethora of source files net/mac80211/*.c.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: abstract filename mapping
Jani Nikula [Tue, 7 Jun 2016 07:53:39 +0000 (10:53 +0300)] 
kernel-doc: abstract filename mapping

Reduce duplication in follow-up work. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: add missing semi-colons in option parsing
Jani Nikula [Tue, 7 Jun 2016 07:29:59 +0000 (10:29 +0300)] 
kernel-doc: add missing semi-colons in option parsing

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: do not warn about duplicate default section names
Jani Nikula [Fri, 10 Jun 2016 08:14:05 +0000 (11:14 +0300)] 
kernel-doc: do not warn about duplicate default section names

Since

commit 32217761ee9db0215350dfe1ca4e66f312fb8c54
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Sun May 29 09:40:44 2016 +0300

    kernel-doc: concatenate contents of colliding sections

we started getting (more) errors on duplicate section names, especially
on the default section name "Description":

include/net/mac80211.h:3174: warning: duplicate section name 'Description'

This is usually caused by a slightly unorthodox placement of parameter
descriptions, like in the above case, and kernel-doc resetting back to
the default section more than once within a kernel-doc comment.

Ignore warnings on the duplicate section name automatically assigned by
kernel-doc, and only consider explicitly user assigned duplicate section
names an issue.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agokernel-doc: remove old debug cruft from dump_section()
Jani Nikula [Fri, 10 Jun 2016 08:28:13 +0000 (11:28 +0300)] 
kernel-doc: remove old debug cruft from dump_section()

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
8 years agodocs: kernel-doc: Add "example" and "note" to the magic section types
Jonathan Corbet [Thu, 9 Jun 2016 19:35:05 +0000 (13:35 -0600)] 
docs: kernel-doc: Add "example" and "note" to the magic section types

Lots of kerneldoc entries use "example:" or "note:" as section headers.
Until such a time as we can make them use proper markup, make them work as
intended.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agodocs: self-protection: rename "leak" to "exposure"
Kees Cook [Wed, 18 May 2016 13:37:47 +0000 (06:37 -0700)] 
docs: self-protection: rename "leak" to "exposure"

The meaning of "leak" can be both "untracked resource allocation" and
"memory content disclosure". This document's use was entirely of the
latter meaning, so avoid the confusion by using the Common Weakness
Enumeration name for this: Information Exposure (CWE-200). Additionally
adds a section on structure randomization.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
8 years agoMerge branch 'sphinx-for-docs-next' into doc/4.8
Jonathan Corbet [Thu, 9 Jun 2016 19:17:11 +0000 (13:17 -0600)] 
Merge branch 'sphinx-for-docs-next' into doc/4.8

Jani Nikula says:

Jon, this is v2 of [1] and [2], with a considerable amount of polish and
fixes added. We started dogfooding this within drm-intel, and Daniel has
reviewed the lot and contributed a number of fixes, most notably
accurate file and line number references from Sphinx build
errors/warnings to the kernel-doc comments in source code.

We believe this is now in good shape for merging for v4.8. It's all in
my sphinx-for-docs-next branch that you've already looked at; pull
details below.

When this lands in docs-next and we can backmerge to drm, we'll plunge
ahead and convert gpu.tmpl to rst, and have that ready for v4.8. We
think it's best to contribute that via the drm tree, as it'll involve
splitting up the documentation and likely numerous updates to kernel-doc
comments.

I plan to update Documentation/kernel-doc-nano-HOWTO.txt for Sphinx and
rst, obviously converting it to rst while at it.

8 years ago[media] mt2063: use lib gcd
Zhaoxiu Zeng [Wed, 27 Apr 2016 07:07:08 +0000 (04:07 -0300)] 
[media] mt2063: use lib gcd

This patch removes the local MT2063_gcd function, uses lib gcd instead

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl2832: add support for slave ts pid filter
Martin Blumenstingl [Tue, 7 Jun 2016 21:31:47 +0000 (18:31 -0300)] 
[media] rtl2832: add support for slave ts pid filter

The rtl2832 demod has 2 sets of PID filters. This patch enables
the filter support when using a slave demod.

Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: fix logging
Antti Palosaari [Wed, 1 Jun 2016 11:25:05 +0000 (08:25 -0300)] 
[media] af9035: fix logging

Remove __func__ and KBUILD_MODNAME from logging formatters and pass
USB interface device instead, so logging can be done correctly.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: fix for MXL5007T devices with I2C read issues
Alessandro Radicati [Thu, 12 May 2016 10:47:12 +0000 (07:47 -0300)] 
[media] af9035: fix for MXL5007T devices with I2C read issues

The MXL5007T tuner will lock-up on some devices after an I2C read
transaction.  This patch works around this issue by inhibiting such
operations and emulating a 0x00 response. The workaround is only
applied to USB devices known to exhibit this flaw.

Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: I2C combined write + read transaction fix
Alessandro Radicati [Tue, 5 Apr 2016 22:23:43 +0000 (19:23 -0300)] 
[media] af9035: I2C combined write + read transaction fix

This patch will modify the af9035 driver to use the register address
fields of the I2C read command for the combined write/read transaction
case.  Without this change, the firmware issues just a I2C read
transaction without the preceding write transaction to select the
register.

Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] of: reserved_mem: restore old behavior when no region is defined
Marek Szyprowski [Wed, 8 Jun 2016 06:51:53 +0000 (03:51 -0300)] 
[media] of: reserved_mem: restore old behavior when no region is defined

Change return value back to -ENODEV when no region is defined for given
device. This restores old behavior of this function, as some drivers rely
on such error code.

Fixes: 59ce4039727ef40 ("of: reserved_mem: add support for using more than
       one region for given device")

Reported-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
8 years ago[media] drivers/media/dvb-core/en50221: move code to dvb_ca_private_free()
Max Kellermann [Mon, 21 Mar 2016 13:30:17 +0000 (10:30 -0300)] 
[media] drivers/media/dvb-core/en50221: move code to dvb_ca_private_free()

Prepare for postponing the call until all file handles have been
closed.

[mchehab@osg.samsung.com: make checkpatch happy]
Signed-off-by: Max Kellermann <max@duempel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] ds3000: return error if invalid symbol rate is set
Olli Salonen [Wed, 16 Mar 2016 11:04:51 +0000 (08:04 -0300)] 
[media] ds3000: return error if invalid symbol rate is set

Return -EINVAL if ds3000_set_frontend is called with invalid parameters.

v1 of the patch series got incorrect subject lines.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] fix semicolon.cocci warnings
Fengguang Wu [Tue, 7 Jun 2016 15:26:01 +0000 (12:26 -0300)] 
[media] fix semicolon.cocci warnings

drivers/media/dvb-frontends/helene.c:750:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: sort the config symbols which are auto-selected
Martin Blumenstingl [Sun, 22 May 2016 16:12:07 +0000 (13:12 -0300)] 
[media] rtl28xxu: sort the config symbols which are auto-selected

No functional changes.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: auto-select more DVB-frontends and tuners
Martin Blumenstingl [Sun, 22 May 2016 16:12:06 +0000 (13:12 -0300)] 
[media] rtl28xxu: auto-select more DVB-frontends and tuners

This adds the missing auto-select bits for DVB-frontends and tuners
(if MEDIA_SUBDRV_AUTOSELECT is enabled) which are used by the various
rtl28xxu devices.
The driver itself probes for three more tuners, but it's not actually
using any of them:
- MEDIA_TUNER_MT2063
- MEDIA_TUNER_MT2266
- MEDIA_TUNER_MXL5007T

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: move out of staging to media
Antti Palosaari [Sat, 14 May 2016 05:08:15 +0000 (08:08 +0300)] 
[media] mn88472: move out of staging to media

Move mn88472 DVB-T/T2/C demod driver out of staging to media.

v2: Fix build error reported by kbuild test robot:
drivers/staging/media/mn88472/Makefile: No such file or directory

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: finalize driver
Antti Palosaari [Fri, 13 May 2016 15:19:19 +0000 (12:19 -0300)] 
[media] mn88472: finalize driver

Finalize driver in order to move out of staging.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: fix typo
Julia Lawall [Tue, 17 May 2016 14:38:42 +0000 (11:38 -0300)] 
[media] mn88472: fix typo

firmare -> firmware

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: increase failed I2C msg repeat count to 3
Antti Palosaari [Fri, 13 May 2016 15:08:45 +0000 (12:08 -0300)] 
[media] rtl28xxu: increase failed I2C msg repeat count to 3

1 and 2 wasn't enough for mn88472 chip on Astrometa device,
so increase it to 3.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88473: fix typo
Julia Lawall [Tue, 17 May 2016 14:38:41 +0000 (11:38 -0300)] 
[media] mn88473: fix typo

firmare -> firmware

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88473: fix error path on probe()
Antti Palosaari [Sat, 14 May 2016 05:29:21 +0000 (02:29 -0300)] 
[media] mn88473: fix error path on probe()

Latest, 3rd, regmap instance should be freed on error case.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated timb driver
Hans Verkuil [Thu, 2 Jun 2016 07:10:58 +0000 (04:10 -0300)] 
[media] staging/media: remove deprecated timb driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Richard Röjfors <richard@puffinpack.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated omap1 driver
Hans Verkuil [Thu, 2 Jun 2016 07:09:32 +0000 (04:09 -0300)] 
[media] staging/media: remove deprecated omap1 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated mx3 driver
Hans Verkuil [Thu, 2 Jun 2016 07:07:49 +0000 (04:07 -0300)] 
[media] staging/media: remove deprecated mx3 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated mx2 driver
Hans Verkuil [Thu, 2 Jun 2016 07:03:47 +0000 (04:03 -0300)] 
[media] staging/media: remove deprecated mx2 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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