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media: doc: poll: fix links to dual-ioctl sections 

Links like :ref:`VIDIOC_STREAMON` expand to "ioctl VIDIOC_STREAMON,
VIDIOC_STREAMOFF". Thus our reader will think we are talking about
STREAMON _and_ STREAMOFF, but only one of the two actually applies
in some cases.

Fix by adding a link title, so the reader will read only the correct
ioctl name.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Luca Ceresoli 2018-03-02 04:37:20 -05:00 committed by Mauro Carvalho Chehab
parent f68e68d292
commit e97c19074f
1 changed files with 4 additions and 4 deletions
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8
Documentation/media/uapi/v4l/func-poll.rst
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@ -39,7 +39,7 @@ When streaming I/O has been negotiated this function waits until a
buffer has been filled by the capture device and can be dequeued with
the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. For output devices this
function waits until the device is ready to accept a new buffer to be
queued up with the :ref:`VIDIOC_QBUF` ioctl for
queued up with the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl for
display. When buffers are already in the outgoing queue of the driver
(capture) or the incoming queue isn't full (display) the function
returns immediately.
@ -52,11 +52,11 @@ flags in the ``revents`` field, output devices the ``POLLOUT`` and
``POLLWRNORM`` flags. When the function timed out it returns a value of
zero, on failure it returns -1 and the ``errno`` variable is set
appropriately. When the application did not call
:ref:`VIDIOC_STREAMON` the :ref:`poll() <func-poll>`
:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` the :ref:`poll() <func-poll>`
function succeeds, but sets the ``POLLERR`` flag in the ``revents``
field. When the application has called
:ref:`VIDIOC_STREAMON` for a capture device but
hasn't yet called :ref:`VIDIOC_QBUF`, the
:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` for a capture device but
hasn't yet called :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, the
:ref:`poll() <func-poll>` function succeeds and sets the ``POLLERR`` flag in
the ``revents`` field. For output devices this same situation will cause
:ref:`poll() <func-poll>` to succeed as well, but it sets the ``POLLOUT`` and