.. -*- coding: utf-8; mode: rst -*-

.. _media-func-close:

*************
media close()
*************

Name
====

media-close - Close a media device


Synopsis
========

.. code-block:: c

    #include <unistd.h>


.. c:function:: int close( int fd )
    :name: mc-close

Arguments
=========

``fd``
    File descriptor returned by :c:func:`open() <mc-open>`.


Description
===========

Closes the media device. Resources associated with the file descriptor
are freed. The device configuration remain unchanged.


Return Value
============

:ref:`close() <media-func-close>` returns 0 on success. On error, -1 is returned, and
``errno`` is set appropriately. Possible error codes are:

EBADF
    ``fd`` is not a valid open file descriptor.
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/acpi?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>acpi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/acrestyp.h?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>acrestyp.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Alexander Stein &lt;alexander.stein@systec-electronic.com&gt;</td><td class='right'>2017-01-30 12:35:28 +0100</td></tr>
<tr><th>committer</th><td>Linus Walleij &lt;linus.walleij@linaro.org&gt;</td><td class='right'>2017-01-30 15:53:57 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/acrestyp.h?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>cdca06e4e85974d8a3503ab15709dbbaf90d3dd1</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/acpi/acrestyp.h?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>268b0c01070a957006db97c88dccb5fb061440ff</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/acpi/acrestyp.h?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>include/acpi/acrestyp.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/acrestyp.h?id=1b89970d81bbd52720fc64a3fe9572ee33588363'>1b89970d81bbd52720fc64a3fe9572ee33588363</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/acpi/acrestyp.h?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1&amp;id2=1b89970d81bbd52720fc64a3fe9572ee33588363'>diff</a>)</td></tr></table>
<div class='commit-subject'>pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler</div><div class='commit-msg'>According to VLI64 Intel Atom E3800 Specification Update (#329901)
concurrent read accesses may result in returning 0xffffffff and write
accesses may be dropped silently.
To workaround all accesses must be protected by locks.

Cc: stable@vger.kernel.org
Signed-off-by: Alexander Stein &lt;alexander.stein@systec-electronic.com&gt;
Acked-by: Mika Westerberg &lt;mika.westerberg@linux.intel.com&gt;
Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=cdca06e4e85974d8a3503ab15709dbbaf90d3dd1'>Diffstat</a> (limited to 'include/acpi/acrestyp.h')</div><table summary='diffstat' class='diffstat'>