1.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
2
3.. _request-func-close:
4
5***************
6request close()
7***************
8
9Name
10====
11
12request-close - Close a request file descriptor
13
14
15Synopsis
16========
17
18.. code-block:: c
19
20    #include <unistd.h>
21
22
23.. c:function:: int close( int fd )
24    :name: req-close
25
26Arguments
27=========
28
29``fd``
30    File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
31
32
33Description
34===========
35
36Closes the request file descriptor. Resources associated with the request
37are freed once all file descriptors associated with the request are closed
38and the driver has completed the request.
39See :ref:`here <media-request-life-time>` for more information.
40
41
42Return Value
43============
44
45:ref:`close() <request-func-close>` returns 0 on success. On error, -1 is
46returned, and ``errno`` is set appropriately. Possible error codes are:
47
48EBADF
49    ``fd`` is not a valid open file descriptor.
50