1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>usb_autopm_put_interface</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux-USB Host Side API"><link rel="up" href="usbcore.html" title="Chapter&#160;5.&#160;USB Core APIs"><link rel="prev" href="API-usb-disable-autosuspend.html" title="usb_disable_autosuspend"><link rel="next" href="API-usb-autopm-put-interface-async.html" title="usb_autopm_put_interface_async"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">usb_autopm_put_interface</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-usb-disable-autosuspend.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;5.&#160;USB Core APIs</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-usb-autopm-put-interface-async.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-usb-autopm-put-interface"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_autopm_put_interface &#8212; 
2     decrement a USB interface's PM-usage counter
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">usb_autopm_put_interface </b>(</code></td><td>struct usb_interface * <var class="pdparam">intf</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1116405804"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>intf</code></em></span></dt><dd><p>
4     the usb_interface whose counter should be decremented
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1116407404"></a><h2>Description</h2><p>
6   This routine should be called by an interface driver when it is
7   finished using <em class="parameter"><code>intf</code></em> and wants to allow it to autosuspend.  A typical
8   example would be a character-device driver when its device file is
9   closed.
10   </p><p>
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12   The routine decrements <em class="parameter"><code>intf</code></em>'s usage counter.  When the counter reaches
13   0, a delayed autosuspend request for <em class="parameter"><code>intf</code></em>'s device is attempted.  The
14   attempt may fail (see <code class="function">autosuspend_check</code>).
15   </p><p>
16
17   This routine can run only in process context.
18</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-usb-disable-autosuspend.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="usbcore.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-usb-autopm-put-interface-async.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">usb_disable_autosuspend</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">usb_autopm_put_interface_async</span></td></tr></table></div></body></html>
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