Commit dc58a553 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: buffer.rst: only set V4L2_BUF_FLAG_REQUEST_FD for QBUF 



Document that V4L2_BUF_FLAG_REQUEST_FD should only be used with
VIDIOC_QBUF and cleared otherwise.

Signed-off-by: default avatarHans Verkuil <hansverk@cisco.com>
Reviewed-by: default avatarTomasz Figa <tfiga@chromium.org>
Acked-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent b6b84557

Documentation/media/uapi/v4l/buffer.rst

+2 −0
Original line number Diff line number Diff line
@@ -312,6 +312,8 @@ struct v4l2_buffer 
        and flag ``V4L2_BUF_FLAG_REQUEST_FD`` is set, then the buffer will be

	queued to that request. This is set by the user when calling

	: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 requests are supported but an invalid request file descriptor is

	given, then ``EINVAL`` will be returned.

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