media: imx214: don't de-reference a NULL pointer

As warned by smatch:
drivers/media/i2c/imx214.c:591 imx214_set_format() warn: variable dereferenced before check 'format' (see line 589)

It turns that the code at imx214_set_format() has support for being
called with the format being NULL. I've no idea why, as it is only
called internally with the pointer set, and via subdev API (with
should also set it).

Also, the entire logic there depends on having format != NULL, so
just remove the bogus broken support for a null format.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l: rcar_fdp1: Fix indentation oddities

Indentation is odd in several places, especially when printing messages
to the kernel log. Fix it to match the usual coding style.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: set pixelformat to V4L2_PIX_FMT_FWHT_STATELESS for stateless decoder

for stateless decoder, set the output pixelformat
to V4L2_PIX_FMT_FWHT_STATELESS and the pix info to
pixfmt_stateless_fwht

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Add support for stateless decoder.

Implement a stateless decoder for the new node.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: add 'return 0;' before default case in vicodec_try_ctrl()]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Register another node for stateless decoder

Add stateless decoder instance field to the dev struct and
register another node for the statelsess decoder.
The stateless API for the node will be implemented in further patches.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix typo: videdev-stateless-dec -> stateless-decoder]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l2-ioctl.c: add V4L2_PIX_FMT_FWHT_STATELESS to v4l_fill_fmtdesc

Add V4L2_PIX_FMT_FWHT_STATELESS to the list of pixelformats that
v4l_fill_fmtdesc() understands.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Introducing stateless fwht defs and structs

Add structs and definitions needed to implement stateless
decoder for fwht and add I/P-frames QP controls to the
public api.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: add documentation to V4L2_PIX_FMT_FWHT_STATELESS

add documentation to V4L2_PIX_FMT_FWHT_STATELESS
in pixfmt-compressed.rst

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: add documentation to V4L2_CID_MPEG_VIDEO_FWHT_PARAMS

add documentation to V4L2_CID_MPEG_VIDEO_FWHT_PARAMS
control and its related 'v4l2_ctrl_fwht_params' struct

[mchehab+samsung@kernel.org: remove extra blank lines]
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: add documentation to V4L2_CID_FWHT_I/P_FRAME_QP

add documentation to V4L2_CID_FWHT_I/P_FRAME_QP
controls in ext-ctrls-codec.rst

[mchehab+samsung@kernel.org: remove extra blank lines]
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: add struct for encoder/decoder instance

Add struct 'vicodec_dev_instance' for the fields in vicodec_dev
that have have both decoder and encoder versions.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Handle the case that the reference buffer is NULL

In the stateless decoder the reference buffer is null if the
frame is an I-frame (flagged with FWHT_FL_I_FRAME).
Make sure not to dereference it in that case.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: rename v4l2_fwht_default_fmt to v4l2_fwht_find_nth_fmt

Rename 'v4l2_fwht_default_fmt' to 'v4l2_fwht_find_nth_fmt'
and add a function 'v4l2_fwht_validate_fmt' to check if
a format info matches the parameters.
This function will also be used to validate the stateless
params when adding support for stateless codecs.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Validate version dependent header values in a separate function

Move the code that validates version dependent header
values to a separate function 'validate_by_version'

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: keep the ref frame according to the format in decoder

In the decoder, save the inner reference frame in the same
format as the capture buffer.
The decoder writes directly to the capture buffer and then
the capture buffer is copied to the reference buffer.
This will simplify the stateless decoder.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: add field 'buf' to fwht_raw_frame

Add the field 'buf' to fwht_raw_frame to indicate
the start of the raw frame buffer.
This field will be used to copy the capture buffer
to the reference buffer in the next patch.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: Move raw frame preparation code to a function

Introduce 'prepare_raw_frame' function that fills the values
of a raw frame struct according to the format.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: bugfix: free compressed_frame upon device release

Free compressed_frame buffer upon device release.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: bugfix - call v4l2_m2m_buf_copy_metadata also if decoding fails

The function 'v4l2_m2m_buf_copy_metadata' should
be called even if decoding/encoding ends with
status VB2_BUF_STATE_ERROR, so that the metadata
is copied from the source buffer to the dest buffer.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: change variable name for the return value of v4l2_fwht_encode

v4l2_fwht_encode returns either an error code on
failure or the size of the compressed frame on
success. So change the var assigned to it from
'ret' to 'comp_sz_or_errcode' to clarify that.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l2-ctrl: v4l2_ctrl_request_setup returns with error upon failure

If one of the controls fails to set,
then 'v4l2_ctrl_request_setup'
immediately returns with the error code.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: upon release, call m2m release before freeing ctrl handler

'v4l2_m2m_ctx_release' calls request complete
so it should be called before 'v4l2_ctrl_handler_free'.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: fix g_selection: either handle crop or compose

The logic of g_selection was wrong: encoders support crop,
decoders support compose, but the code allowed both.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: selection api should only check single buffer types

The selection api should check only single buffer types
because multiplanar types are converted to
single in drivers/media/v4l2-core/v4l2-ioctl.c

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: media requests: return EBADR instead of EACCES

If requests are used when they shouldn't, or not used when they should,
then return EBADR (Invalid request descriptor) instead of EACCES.

The reason for this change is that EACCES has more to do with permissions
(not being the owner of the resource), but in this case the request file
descriptor is just wrong for the current mode of the device.

Update the documentation accordingly.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cedrus: set requires_requests

The cedrus stateless decoder requires the use of request, so
indicate this by setting requires_requests to 1.

Note that the cedrus driver never checked for this, and as far
as I can tell would just crash if an attempt was made to queue
a buffer without a request.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vb2: add requires_requests bit for stateless codecs

Stateless codecs require the use of the Request API as opposed of it
being optional.

So add a bit to indicate this and let vb2 check for this.

If an attempt is made to queue a buffer without an associated request,
then the EBADR error is returned to userspace.

Doing this check in the vb2 core simplifies drivers, since they
don't have to check for this, they can just set this flag.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: Kconfig files: use the right help coding style

Checkpatch wants to use 'help' instead of '---help---':

WARNING: prefer 'help' over '---help---' for new help texts

Let's change it globally at the media subsystem, as otherwise people
would keep using the old way.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l2-fwnode: Add a deprecation note in the old ACPI parsing example

This is not how ACPI tables are written. Add a deprecation note and refer
to the proper documentation.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ipu3-cio2: Set CSI-2 receiver sub-device entity function

Set the entity function for the four CSI-2 receiver sub-devices the driver
creates. This avoids a kernel warning from each as well.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l: i2c: Regroup lens drivers under their own section

The lens drivers had ended up under the video decoder section; add a new
one just for them, between the camera sensors and flash drivers.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ti-vpe: Parse local endpoint for properties, not the remote one

ti-vpe driver parsed the remote endpoints for properties but ignored the
local ones. Fix this by parsing the local endpoint properties instead.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: pxa-camera: Match with device node, not the port node

V4L2 fwnode matching right now still works based on device nodes, not port
nodes. Fix this.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l2-fwnode: The first default data lane is 0 on C-PHY

C-PHY has no clock lanes. Therefore the first data lane is 0 by default.

Fixes: edc6d56c2e7e ("media: v4l: fwnode: Support parsing of CSI-2 C-PHY endpoints")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: v4l2-fwnode: Defaults may not override endpoint configuration in firmware

The lack of defaults provided by the caller to
v4l2_fwnode_endpoint_parse() signals the use of the default lane mapping.
The default lane mapping must not be used however if the firmmare contains
the lane mapping. Disable the default lane mapping in that case, and
improve the debug messages telling of the use of the defaults.

This was missed previously since the default mapping will only unsed in
this case if the bus type is set, and no driver did both while still
needing the lane mapping configuration.

Fixes: b4357d21d674 ("media: v4l: fwnode: Support default CSI-2 lane mapping for drivers")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ov7670: don't access registers when the device is powered off

Since commit 3d6a8fe25605 ("media: ov7670: hook s_power onto v4l2 core"),
the device is actually powered off while the video stream is stopped.

So now set_format and s_frame_interval could be called while the device
is powered off, but these callbacks try to change the register settings
at this time.

The frame format and framerate will be restored right after power-up, so
we can just postpone applying these changes at these callbacks if the
device is not powered up.

Fixes: 3d6a8fe25605 ("media: ov7670: hook s_power onto v4l2 core")
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ov7670: restore default settings after power-up

Since commit 3d6a8fe25605 ("media: ov7670: hook s_power onto v4l2 core"),
the device is actually powered off while the video stream is stopped.

The frame format and framerate are restored right after power-up, but
restoring the default register settings is forgotten.

Fixes: 3d6a8fe25605 ("media: ov7670: hook s_power onto v4l2 core")
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3: reduce kernel stack usage

The imgu_css_queue structure is too large to be put on the kernel
stack, as we can see in 32-bit builds:

drivers/staging/media/ipu3/ipu3-css.c: In function 'imgu_css_fmt_try':
drivers/staging/media/ipu3/ipu3-css.c:1863:1: error: the frame size of 1172 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

By dynamically allocating this array, the stack usage goes down to an
acceptable 140 bytes for the same x86-32 configuration.

Fixes: f5f2e4273518 ("media: staging/intel-ipu3: Add css pipeline programming")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Cao, Bingbu <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3: mark PM function as __maybe_unused

The imgu_rpm_dummy_cb() looks like an API misuse that is explained
in the comment above it. Aside from that, it also causes a warning
when power management support is disabled:

drivers/staging/media/ipu3/ipu3.c:794:12: error: 'imgu_rpm_dummy_cb' defined but not used [-Werror=unused-function]

The warning is at least easy to fix by marking the function as
__maybe_unused.

Fixes: 7fc7af649ca7 ("media: staging/intel-ipu3: Add imgu top level pci device driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/intel-ipu3-v4l: reduce kernel stack usage

The v4l2_pix_format_mplane structure is too large to be put on the kernel
stack, as we can see in 32-bit builds:

drivers/staging/media/ipu3/ipu3-v4l2.c: In function 'imgu_fmt':
drivers/staging/media/ipu3/ipu3-v4l2.c:753:1: error: the frame size of 1028 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

By dynamically allocating this array, the stack usage goes down to an
acceptable 272 bytes for the same x86-32 configuration.

Fixes: a0ca1627b450 ("media: staging/intel-ipu3: Add v4l2 driver based on media framework")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: reset last_src/dst_buf based on the IS_OUTPUT

When start_streaming was called both last_src_buf and last_dst_buf
pointers were set to NULL, but this depends on whether the capture
or output queue starts streaming.

When decoding with resolution changes in between the capture queue
has to restart streaming whenever a resolution change occurs. And
that would reset last_src_buf as well, which causes a problem if
the decoder was stopped by the application. Since last_src_buf
is now NULL, the LAST flag is never set for the last capture
buffer.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: remove WARN_ON(1) from get_q_data()

Some functions like enum_fmt use the buffer type as was passed
from userspace, which might cause the switch to fall into the
default case. Just drop the WARN_ON(1) to avoid kernel log pollution.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: em28xx-input: make const array addr_list static

Don't populate the array addr_list on the stack but instead make it
static. Makes the object code smaller by 20 bytes

Before:
   text    data     bss     dec     hex filename^M
  16929    3626     384   20939    51cb ../usb/em28xx/em28xx-input.o

After:
   text    data     bss     dec     hex filename^M
  16829    3706     384   20919    51b7 ../usb/em28xx/em28xx-input.o

(gcc version 8.3.0, aarch64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dvb: Add support for the Avermedia TD310

This patch add support for Avermedia TD310 usb stick.

Signed-off-by: Jose Alberto Reguero <jose.alberto.reguero@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dvb: init i2c already in it930x_frontend_attach

i2c bus is already needed when the frontend is probed, so init it already
in it930x_frontend_attach. That prevents errors like:

si2168: probe of 6-0067 failed with error -5

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Jose Alberto Reguero <jose.alberto.reguero@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: si2165: fix a missing check of return value

si2165_readreg8() may fail. Looking into si2165_readreg8(), we will find
that "val_tmp" will be an uninitialized value when regmap_read() fails.
"val_tmp" is then assigned to "val". So if si2165_readreg8() fails,
"val" will be a random value. Further use will lead to undefined
behaviors. The fix checks if si2165_readreg8() fails, and if so, returns
its error code upstream.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Reviewed-by: Matthias Schwarzott <zzam@gentoo.org>
Tested-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: serial_ir: Fix use-after-free in serial_ir_init_module

Syzkaller report this:

BUG: KASAN: use-after-free in sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468
Read of size 8 at addr ffff8881dc7ae030 by task syz-executor.0/6249

CPU: 1 PID: 6249 Comm: syz-executor.0 Not tainted 5.0.0-rc8+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xfa/0x1ce lib/dump_stack.c:113
 print_address_description+0x65/0x270 mm/kasan/report.c:187
 kasan_report+0x149/0x18d mm/kasan/report.c:317
 ? 0xffffffffc1728000
 sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468
 sysfs_remove_file include/linux/sysfs.h:519 [inline]
 driver_remove_file+0x40/0x50 drivers/base/driver.c:122
 remove_bind_files drivers/base/bus.c:585 [inline]
 bus_remove_driver+0x186/0x220 drivers/base/bus.c:725
 driver_unregister+0x6c/0xa0 drivers/base/driver.c:197
 serial_ir_init_module+0x169/0x1000 [serial_ir]
 do_one_initcall+0xfa/0x5ca init/main.c:887
 do_init_module+0x204/0x5f6 kernel/module.c:3460
 load_module+0x66b2/0x8570 kernel/module.c:3808
 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9450132c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f9450132c70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f94501336bc
R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004

Allocated by task 6249:
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc.constprop.3+0xa0/0xd0 mm/kasan/common.c:495
 kmalloc include/linux/slab.h:545 [inline]
 kzalloc include/linux/slab.h:740 [inline]
 bus_add_driver+0xc0/0x610 drivers/base/bus.c:651
 driver_register+0x1bb/0x3f0 drivers/base/driver.c:170
 serial_ir_init_module+0xe8/0x1000 [serial_ir]
 do_one_initcall+0xfa/0x5ca init/main.c:887
 do_init_module+0x204/0x5f6 kernel/module.c:3460
 load_module+0x66b2/0x8570 kernel/module.c:3808
 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 6249:
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:457
 slab_free_hook mm/slub.c:1430 [inline]
 slab_free_freelist_hook mm/slub.c:1457 [inline]
 slab_free mm/slub.c:3005 [inline]
 kfree+0xe1/0x270 mm/slub.c:3957
 kobject_cleanup lib/kobject.c:662 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:67 [inline]
 kobject_put+0x146/0x240 lib/kobject.c:708
 bus_remove_driver+0x10e/0x220 drivers/base/bus.c:732
 driver_unregister+0x6c/0xa0 drivers/base/driver.c:197
 serial_ir_init_module+0x14c/0x1000 [serial_ir]
 do_one_initcall+0xfa/0x5ca init/main.c:887
 do_init_module+0x204/0x5f6 kernel/module.c:3460
 load_module+0x66b2/0x8570 kernel/module.c:3808
 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881dc7ae000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 48 bytes inside of
 256-byte region [ffff8881dc7ae000, ffff8881dc7ae100)
The buggy address belongs to the page:
page:ffffea000771eb80 count:1 mapcount:0 mapping:ffff8881f6c02e00 index:0x0
flags: 0x2fffc0000000200(slab)
raw: 02fffc0000000200 ffffea0007d14800 0000000400000002 ffff8881f6c02e00
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881dc7adf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881dc7adf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881dc7ae000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff8881dc7ae080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881dc7ae100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00

There are already cleanup handlings in serial_ir_init error path,
no need to call serial_ir_exit do it again in serial_ir_init_module,
otherwise will trigger a use-after-free issue.

Fixes: fa5dc29c1fcc ("[media] lirc_serial: move out of staging and rename to serial_ir")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rc: remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cx23885: check allocation return

Checking of kmalloc() seems to have been committed - as
cx23885_dvb_register() is checking for != 0 return, returning
-ENOMEM should be fine here.  While at it address the coccicheck
suggestion to move to kmemdup rather than using kmalloc+memcpy.

Fixes: 46b21bbaa8a8 ("[media] Add support for DViCO FusionHDTV DVB-T Dual Express2")
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: m88ds3103: serialize reset messages in m88ds3103_set_frontend

Ref: https://bugzilla.kernel.org/show_bug.cgi?id=199323

Users are experiencing problems with the DVBSky S960/S960C USB devices
since the following commit:

9d659ae: ("locking/mutex: Add lock handoff to avoid starvation")

The device malfunctions after running for an indeterminable period of
time, and the problem can only be cleared by rebooting the machine.

It is possible to encourage the problem to surface by blocking the
signal to the LNB.

Further debugging revealed the cause of the problem.

In the following capture:
- thread #1325 is running m88ds3103_set_frontend
- thread #42 is running ts2020_stat_work

a> [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 07 80
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 08
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 68 3f
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 08 ff
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 3d
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
b> [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 07 00
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 21
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 66
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
   [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 60 02 10 0b
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07

Two i2c messages are sent to perform a reset in m88ds3103_set_frontend:

  a. 0x07, 0x80
  b. 0x07, 0x00

However, as shown in the capture, the regmap mutex is being handed over
to another thread (ts2020_stat_work) in between these two messages.

>From here, the device responds to every i2c message with an 07 message,
and will only return to normal operation following a power cycle.

Use regmap_multi_reg_write to group the two reset messages, ensuring
both are processed before the regmap mutex is unlocked.

Signed-off-by: James Hutchinson <jahutchinson99@googlemail.com>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dvbsky: Avoid leaking dvb frontend

Commit 14f4eaeddabc ("media: dvbsky: fix driver unregister logic") fixed
a use-after-free by removing the reference to the frontend after deleting
the backing i2c device.

This has the unfortunate side effect the frontend device is never freed
in the dvb core leaving a dangling device, leading to errors when the
dvb core tries to register the frontend after e.g. a replug as reported
here: https://www.spinics.net/lists/linux-media/msg138181.html

media: dvbsky: issues with DVBSky T680CI

===
[  561.119145] sp2 8-0040: CIMaX SP2 successfully attached
[  561.119161] usb 2-3: DVB: registering adapter 0 frontend 0 (Silicon Labs
Si2168)...
[  561.119174] sysfs: cannot create duplicate filename '/class/dvb/
dvb0.frontend0'
===

The use after free happened as dvb_usbv2_disconnect calls in this order:
- dvb_usb_device::props->exit(...)
- dvb_usbv2_adapter_frontend_exit(...)
  + if (fe) dvb_unregister_frontend(fe)
  + dvb_usb_device::props->frontend_detach(...)

Moving the release of the i2c device from exit() to frontend_detach()
avoids the dangling pointer access and allows the core to unregister
the frontend.

This was originally reported for a DVBSky T680CI, but it also affects
the MyGica T230C. As all supported devices structure the registration/
unregistration identically, apply the change for all device types.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: wl128x: Fix an error code in fm_download_firmware()

We forgot to set "ret" on this error path.

Fixes: e8454ff7b9a4 ("[media] drivers:media:radio: wl128x: FM Driver Common sources")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging: davinci: drop pointless static qualifier in vpfe_resizer_init()

There is no need to have the 'T *v' variable static
since new value always be assigned before use it.

Signed-off-by: Mao Wenan <maowenan@huawei.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging: media: zoran: Fixes a checkpatch.pl error in videocodec.c

ERROR: do not initialise statics to NULL

Signed-off-by: claudiojpaz <claudiojpaz@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging: davinci_vpfe: disallow building with COMPILE_TEST

The driver should really call dm365_isif_setup_pinmux() through a callback,
but uses a hack to include a davinci specific machine header file when
compile testing instead. This works almost everywhere, but not on the
ARM omap1 platform, which has another header named mach/mux.h. This
causes a build failure:

drivers/staging/media/davinci_vpfe/dm365_isif.c:2028:2: error: implicit declaration of function 'davinci_cfg_reg' [-Werror,-Wimplicit-function-declaration]
        davinci_cfg_reg(DM365_VIN_CAM_WEN);
        ^
drivers/staging/media/davinci_vpfe/dm365_isif.c:2028:2: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
drivers/staging/media/davinci_vpfe/dm365_isif.c:2028:18: error: use of undeclared identifier 'DM365_VIN_CAM_WEN'
        davinci_cfg_reg(DM365_VIN_CAM_WEN);
                        ^
drivers/staging/media/davinci_vpfe/dm365_isif.c:2029:18: error: use of undeclared identifier 'DM365_VIN_CAM_VD'
        davinci_cfg_reg(DM365_VIN_CAM_VD);
                        ^
drivers/staging/media/davinci_vpfe/dm365_isif.c:2030:18: error: use of undeclared identifier 'DM365_VIN_CAM_HD'
        davinci_cfg_reg(DM365_VIN_CAM_HD);
                        ^
drivers/staging/media/davinci_vpfe/dm365_isif.c:2031:18: error: use of undeclared identifier 'DM365_VIN_YIN4_7_EN'
        davinci_cfg_reg(DM365_VIN_YIN4_7_EN);
                        ^
drivers/staging/media/davinci_vpfe/dm365_isif.c:2032:18: error: use of undeclared identifier 'DM365_VIN_YIN0_3_EN'
        davinci_cfg_reg(DM365_VIN_YIN0_3_EN);
                        ^
7 errors generated.

Exclude omap1 from compile-testing, under the assumption that all others
still work.

Fixes: 4907c73deefe ("media: staging: davinci_vpfe: allow building with COMPILE_TEST")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: i2c: adv748x: select V4L2_FWNODE

Building adv748x fails now unless V4L2_FWNODE is selected:

drivers/media/i2c/adv748x/adv748x-core.o: In function `adv748x_probe':
adv748x-core.c:(.text+0x1b2c): undefined reference to `v4l2_fwnode_endpoint_parse'

Fixes: 6a18865da8e3 ("media: i2c: adv748x: store number of CSI-2 lanes described in device tree")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: vdic: Fix wrong CSI group ID

The i.MX7 capture support forgot to change the group ID for the CSI
to the IPU CSI in VDIC sub-device, it was left at the i.MX7 CSI
group ID.

Fixes: 67673ed55084 ("media: staging/imx: rearrange group id to take in account IPU")
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rockchip-vpu: Remove duplicated include from rockchip_vpu_drv.c

Remove duplicated include.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: strscpy() returns a negative value on failure unlike strlcpy().

strscpy() returns a negative value on failure unlike strlcpy(),
so fix the WARN_ON accordingly.

Signed-off-by: Hans Petter Selasky <hps@selasky.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: added commit message]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: stream: init/terminate the first entity

The s_stream callback was not being called for the first entity in the
stream pipeline array.
Instead of verifying the type of the node (video or subdevice) and
calling s_stream from the second entity in the pipeline, do this process
for all the entities in the pipeline for consistency.

The previous code was not a problem because the first entity is a video
device and not a subdevice, but this patch prepares vimc to allow
setting some configuration in the entity before calling s_stream.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Tested-by: André Almeida <andre.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix line-too-long warning]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: stream: add docs to struct vimc_stream

Add missing documentation for struct vimc_stream

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: stream: cleanup frame field from struct vimc_stream

There is no need to have the frame field in the vimc_stream struct.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Tested-by: André Almeida <andre.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: cap: fix step width/height in enum framesize

The type V4L2_FRMSIZE_TYPE_CONTINUOUS expects a step of 1.
This fixes v4l2-compliance test error:

        fail: v4l2-test-formats.cpp(184): invalid step_width/height for continuous framesize
test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: FAIL

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: stream: fix thread state before sleep

The state TASK_UNINTERRUPTIBLE should be set just before
schedule_timeout() call, so it knows the sleep mode it should enter.
There is no point in setting TASK_UNINTERRUPTIBLE at the initialization
of the thread as schedule_timeout() will set the state back to
TASK_RUNNING.

This fixes a warning in __might_sleep() call, as it's expecting the
task to be in TASK_RUNNING state just before changing the state to
a sleeping state.

Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: deb: fix default sink bayer format

The format of the sink pad should be a bayer mbus format.

This fixes a kernel NULL pointer dereference error that was caused when
the stream starts because the configured format was not found in the
pixelmap table.

Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: videobuf2: Return error after allocation failure

There is no point to continuing assignment after memory allocation
failed, rather throw error immediately.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: rebase and remove empty line before the if]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: gspca: do not resubmit URBs when streaming has stopped

When streaming is stopped all URBs are killed, but in fill_frame and in
bulk_irq this results in an attempt to resubmit the killed URB. That is
not what you want and causes spurious kernel messages.

So check if streaming has stopped before resubmitting.

Also check against gspca_dev->streaming rather than vb2_start_streaming_called()
since vb2_start_streaming_called() will return true when in stop_streaming,
but gspca_dev->streaming is set to false when stop_streaming is called.

Fixes: 6992effe5344 ("gspca: Kill all URBs before releasing any of them")
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: au0828: minor fix to a misleading comment in _close()

Fix a misleading comment in _close() and a spelling error.

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: replace WARN_ON in __media_pipeline_start()

__media_pipeline_start() does WARN_ON() when active pipe doesn't
match the input arg entity's pipe.

Replace WARN_ON with a conditional and error message that includes
names of both entities.

Signed-off-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vicodec: avoid clang frame size warning

Clang-9 makes some different inlining decisions compared to gcc, which
leads to a warning about a possible stack overflow problem when building
with CONFIG_KASAN, including when setting asan-stack=0, which avoids
most other frame overflow warnings:

drivers/media/platform/vicodec/codec-fwht.c:673:12: error: stack frame size of 2224 bytes in function 'encode_plane'

Manually adding noinline_for_stack annotations in those functions
called by encode_plane() or decode_plane() that require a significant
amount of kernel stack makes this impossible to happen with any
compiler.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cx18: update *pos correctly in cx18_read_pos()

We should be updating *pos.  The current code is a no-op.

Fixes: 1c1e45d17b66 ("V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ivtv: update *pos correctly in ivtv_read_pos()

We had intended to update *pos, but the current code is a no-op.

Fixes: 1a0adaf37c30 ("V4L/DVB (5345): ivtv driver for Conexant cx23416/cx23415 MPEG encoder/decoder")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: go7007: avoid clang frame overflow warning with KASAN

clang-8 warns about one function here when KASAN is enabled, even
without the 'asan-stack' option:

drivers/media/usb/go7007/go7007-fw.c:1551:5: warning: stack frame size of 2656 bytes in function

I have reported this issue in the llvm bugzilla, but to make
it work with the clang-8 release, a small annotation is still
needed.

Link: https://bugs.llvm.org/show_bug.cgi?id=38809
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warning]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: saa7146: avoid high stack usage with clang

Two saa7146/hexium files contain a construct that causes a warning
when built with clang:

drivers/media/pci/saa7146/hexium_orion.c:210:12: error: stack frame size of 2272 bytes in function 'hexium_probe'
      [-Werror,-Wframe-larger-than=]
static int hexium_probe(struct saa7146_dev *dev)
           ^
drivers/media/pci/saa7146/hexium_gemini.c:257:12: error: stack frame size of 2304 bytes in function 'hexium_attach'
      [-Werror,-Wframe-larger-than=]
static int hexium_attach(struct saa7146_dev *dev, struct saa7146_pci_extension_data *info)
           ^

This one happens regardless of KASAN, and the problem is that a
constructor to initialize a dynamically allocated structure leads
to a copy of that structure on the stack, whereas gcc initializes
it in place.

Link: https://bugs.llvm.org/show_bug.cgi?id=40776
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warnings]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: atmel-isc: Add support for BT656 with CRC decoding

The ISC driver currently supports ITU-R 601 encoding which
utilizes the external hsync and vsync signals. ITU-R 656
format removes the need for these pins by embedding the
sync pulses within the data packet.

To support this feature, enable necessary register bits
when this feature is enabled via device tree.

Signed-off-by: Ken Sloat <ksloat@aampglobal.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cedrus: Add support for H6

H6 has improved VPU. It supports 10-bit HEVC decoding and AFBC output
format for HEVC.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cedrus: Add a quirk for not setting DMA offset

H6 VPU doesn't work if DMA offset is set.

Add a quirk for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dt-bindings: media: cedrus: Add H6 compatible

This adds a compatible for H6. H6 VPU supports 10-bit HEVC decoding and
additional AFBC output format for HEVC.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vb2: drop VB2_BUF_STATE_REQUEUEING

The last user of this state has been converted, so we can now drop
this. Requeueing causes the queue to become unordered, which causes
problems with requests and (in the future) fences.

Since it is no longer needed, just get rid of this.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cobalt: replace VB2_BUF_STATE_REQUEUEING by _ERROR

The cobalt driver is the only driver that uses VB2_BUF_STATE_REQUEUEING.
Replace it by VB2_BUF_STATE_ERROR so we can drop support for the
REQUEUEING state.

The requeueing state was used in the cobalt driver to optimize
buffer handling while waiting for a valid signal: by requeueing
buffers internally there was no need for userspace to handle and
requeue buffers with the ERROR flag set.

However, requeueing also makes the buffer handling unordered, which
is generally a bad idea. Requeueing also does not work with requests
and any future fence support.

Since it is really a minor optimization in the cobalt driver it is
best to just return the buffer in an ERROR state. With this change
support for requeueing can now be removed in vb2.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: stm32-dcmi: fix DMA corruption when stopping streaming

Avoid call of dmaengine_terminate_all() between
dmaengine_prep_slave_single() and dmaengine_submit() by locking
the whole DMA submission sequence.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: stm32-dcmi: fix check of pm_runtime_get_sync return value

Start streaming was sometimes failing because of pm_runtime_get_sync()
non-0 return value. In fact return value was not an error but a
positive value (1), indicating that PM was already enabled.
Fix this by going to error path only with negative return value.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: platform/sh_veu.c: remove redundant NULL pointer checks

Function `sh_veu_find_fmt` returns an address that is an addition of a
base pointer `sh_veu_fmt` and an offset. The base pointer refers to a
global variable of which address cannot be NULL. Therefore, this commit
removes the NULL pointer checks on the return values of function
`sh_veu_find_fmt`.

Signed-off-by: Shaobo He <shaobo@cs.utah.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: cpia2: Fix use-after-free in cpia2_exit

Syzkaller report this:

BUG: KASAN: use-after-free in sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468
Read of size 8 at addr ffff8881f59a6b70 by task syz-executor.0/8363

CPU: 0 PID: 8363 Comm: syz-executor.0 Not tainted 5.0.0-rc8+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xfa/0x1ce lib/dump_stack.c:113
 print_address_description+0x65/0x270 mm/kasan/report.c:187
 kasan_report+0x149/0x18d mm/kasan/report.c:317
 sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468
 sysfs_remove_file include/linux/sysfs.h:519 [inline]
 driver_remove_file+0x40/0x50 drivers/base/driver.c:122
 usb_remove_newid_files drivers/usb/core/driver.c:212 [inline]
 usb_deregister+0x12a/0x3b0 drivers/usb/core/driver.c:1005
 cpia2_exit+0xa/0x16 [cpia2]
 __do_sys_delete_module kernel/module.c:1018 [inline]
 __se_sys_delete_module kernel/module.c:961 [inline]
 __x64_sys_delete_module+0x3dc/0x5e0 kernel/module.c:961
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f86f3754c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000b0
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f86f37556bc
R13: 00000000004bcca9 R14: 00000000006f6b48 R15: 00000000ffffffff

Allocated by task 8363:
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc.constprop.3+0xa0/0xd0 mm/kasan/common.c:495
 kmalloc include/linux/slab.h:545 [inline]
 kzalloc include/linux/slab.h:740 [inline]
 bus_add_driver+0xc0/0x610 drivers/base/bus.c:651
 driver_register+0x1bb/0x3f0 drivers/base/driver.c:170
 usb_register_driver+0x267/0x520 drivers/usb/core/driver.c:965
 0xffffffffc1b4817c
 do_one_initcall+0xfa/0x5ca init/main.c:887
 do_init_module+0x204/0x5f6 kernel/module.c:3460
 load_module+0x66b2/0x8570 kernel/module.c:3808
 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8363:
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:457
 slab_free_hook mm/slub.c:1430 [inline]
 slab_free_freelist_hook mm/slub.c:1457 [inline]
 slab_free mm/slub.c:3005 [inline]
 kfree+0xe1/0x270 mm/slub.c:3957
 kobject_cleanup lib/kobject.c:662 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:67 [inline]
 kobject_put+0x146/0x240 lib/kobject.c:708
 bus_remove_driver+0x10e/0x220 drivers/base/bus.c:732
 driver_unregister+0x6c/0xa0 drivers/base/driver.c:197
 usb_register_driver+0x341/0x520 drivers/usb/core/driver.c:980
 0xffffffffc1b4817c
 do_one_initcall+0xfa/0x5ca init/main.c:887
 do_init_module+0x204/0x5f6 kernel/module.c:3460
 load_module+0x66b2/0x8570 kernel/module.c:3808
 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881f59a6b40
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 48 bytes inside of
 256-byte region [ffff8881f59a6b40, ffff8881f59a6c40)
The buggy address belongs to the page:
page:ffffea0007d66980 count:1 mapcount:0 mapping:ffff8881f6c02e00 index:0x0
flags: 0x2fffc0000000200(slab)
raw: 02fffc0000000200 dead000000000100 dead000000000200 ffff8881f6c02e00
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881f59a6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881f59a6a80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
>ffff8881f59a6b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                                             ^
 ffff8881f59a6b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881f59a6c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc

cpia2_init does not check return value of cpia2_init, if it failed
in usb_register_driver, there is already cleanup using driver_unregister.
No need call cpia2_usb_cleanup on module exit.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: mtk-vcodec: fix access to vb2_v4l2_buffer struct

Commit 0650a91499e0 ("media: mtk-vcodec: Correct return type for mem2mem
buffer helpers") fixed the return types for mem2mem buffer helper
functions, but omitted two occurrences that are accessed in the
mtk_v4l2_debug() macro. These only trigger compiler errors when DEBUG is
defined.

Fixes: 0650a91499e0 ("media: mtk-vcodec: Correct return type for mem2mem buffer helpers")
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rcar-vin: Enable support for r8a774a1

Add the SoC specific information for RZ/G2M(r8a774a1) SoC.
The VIN module of RZ/G2M is similar to R-Car M3-W.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dt-bindings: media: rcar_vin: Add r8a774a1 support

Document RZ/G2M (R8A774A1) SoC bindings.

The RZ/G2M SoC is similar to R-Car M3-W (R8A7796).

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rcar-csi2: Enable support for r8a774a1

Add the MIPI CSI-2 driver support for RZ/G2M(r8a774a1) SoC.
The CSI-2 module of RZ/G2M is similar to R-Car M3-W.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: dt-bindings: media: rcar-csi2: Add r8a774a1 support

Document RZ/G2M (R8A774A1) SoC bindings.

The RZ/G2M SoC is similar to R-Car M3-W (R8A7796).

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rcar_drif: Remove devm_ioremap_resource() error printing

devm_ioremap_resource() already prints an error message on failure, so
there is no need to repeat that.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx7-media-csi: don't store a floating pointer

if imx7_csi_try_fmt() fails, cc variable won't be
initialized and csi->cc[sdformat->pad] would be pointing
to a random location.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: staging/imx7: Fix an error code in mipi_csis_clk_get()

We accidentally return IS_ERR(), which is 1, instead of the PTR_ERR()
which is the negative error code.

Fixes: 7807063b862b ("media: staging/imx7: add MIPI CSI-2 receiver subdev for i.MX7")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: Don't register IPU subdevs/links if CSI port missing

The second IPU internal sub-devices were being registered and links
to them created even when the second IPU is not present. This is wrong
for i.MX6 S/DL and i.MX53 which have only a single IPU.

Fixes: e130291212df5 ("[media] media: Add i.MX media core driver")
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: Rename functions that add IPU-internal subdevs

For the functions that add and remove the internal IPU subdevice
descriptors, rename them to make clear they are the subdevs internal
to the IPU. Also rename the platform data structure for the internal
IPU subdevices. No functional changes.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: Clear fwnode link struct for each endpoint iteration

In imx_media_create_csi_of_links(), the 'struct v4l2_fwnode_link' must
be cleared for each endpoint iteration, otherwise if the remote port
has no "reg" property, link.remote_port will not be reset to zero.
This was discovered on the i.MX53 SMD board, since the OV5642 connects
directly to ipu1_csi0 and has a single source port with no "reg"
property.

Fixes: 621b08eabcddb ("media: staging/imx: remove static media link arrays")
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: csi: Allow unknown nearest upstream entities

On i.MX6, the nearest upstream entity to the CSI can only be the
CSI video muxes or the Synopsys DW MIPI CSI-2 receiver.

However the i.MX53 has no CSI video muxes or a MIPI CSI-2 receiver.
So allow for the nearest upstream entity to the CSI to be something
other than those.

Fixes: bf3cfaa712e5c ("media: staging/imx: get CSI bus type from nearest
upstream entity")

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx7: fix smatch error

Fixes this smatch error:

drivers/staging/media/imx/imx7-mipi-csis.c:716 mipi_csis_set_fmt() error: we previously assumed 'fmt' could be null (see line 709)

fmt is never NULL, so remove the 'fmt &&' condition.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: imx: vdic: Restore default case to prepare_vdi_in_buffers()

Restore a default case to prepare_vdi_in_buffers() to fix the following
smatch errors:

drivers/staging/media/imx/imx-media-vdic.c:236 prepare_vdi_in_buffers() error: uninitialized symbol 'prev_phys'.
drivers/staging/media/imx/imx-media-vdic.c:237 prepare_vdi_in_buffers() error: uninitialized symbol 'curr_phys'.
drivers/staging/media/imx/imx-media-vdic.c:238 prepare_vdi_in_buffers() error: uninitialized symbol 'next_phys'.

Fixes: 6e537b58de772 ("media: imx: vdic: rely on VDIC for correct field order")
Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: rcar-vin: Fix lockdep warning at stream on

Changes to v4l2-fwnode in commit [1] triggered a lockdep warning in
rcar-vin. The first attempt to solve this warning in the rcar-vin driver
was incomplete and only pushed the warning to happen at stream on time
instead of at probe time.

This change reverts the incomplete fix and properly fixes the warning by
removing the need to hold the rcar-vin specific group lock when calling
v4l2_async_notifier_parse_fwnode_endpoints_by_port(). And instead takes
it in the callback where it's really needed.

[1] commit eae2aed1eab9bf08 ("media: v4l2-fwnode: Switch to
v4l2_async_notifier_add_subdev")

Fixes: 6458afc8c49148f0 ("media: rcar-vin: remove unneeded locking in async callbacks")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: vimc: use new release op

Use the new v4l2_subdev_internal_ops release op to free the
subdev memory only when the last user closed the file handle.

Move v4l2_device_unregister_subdev() to the end of the
vimc_ent_sd_unregister() function since now the unregister_subdev()
call may free the vimc_ent_device struct which is used after the
unregister_subdev() call. So this now has to be done last.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>