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media: media-request: EPERM -> EACCES/EBUSY

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If requests are not supported by the driver, then return EACCES, not
EPERM.

If you attempt to mix queueing buffers directly and using requests,
then EBUSY is returned instead of EPERM: once a specific queueing mode
has been chosen the queue is 'busy' if you attempt the other mode
(i.e. direct queueing vs via a request).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil
2018-09-01 07:29:14 -04:00
committed by Mauro Carvalho Chehab
parent ffda0b4c24
commit 15cd442e79
9 changed files with 32 additions and 29 deletions
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2
Documentation/media/uapi/v4l/buffer.rst
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@@ -314,7 +314,7 @@ struct v4l2_buffer
:ref:`ioctl VIDIOC_QBUF <VIDIOC_QBUF>` and ignored by other ioctls.
Applications should not set ``V4L2_BUF_FLAG_REQUEST_FD`` for any ioctls
other than :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`.
If the device does not support requests, then ``EPERM`` will be returned.
If the device does not support requests, then ``EACCES`` will be returned.
If requests are supported but an invalid request file descriptor is
given, then ``EINVAL`` will be returned.