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media: v4l: ctrls: Add debug messages

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Currently, the v4l2 control code is a bit silent on errors.
Add debug messages on (hopefully) most of the error paths.

Signed-off-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Ezequiel Garcia 2019-07-20 07:47:07 -04:00 • committed by Mauro Carvalho Chehab
commit 173f6eacc8
7 changed files with 127 additions and 39 deletions
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1
Documentation/media/kapi/v4l2-dev.rst
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@ -288,6 +288,7 @@ Mask Description
0x08 Log the read and write file operations and the VIDIOC_QBUF and
VIDIOC_DQBUF ioctls.
0x10 Log the poll file operation.
0x20 Log error and messages in the control operations.
===== ================================================================
Video device cleanup