1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>usb_hcd_giveback_urb</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="hcd.html" title="Chapter&#160;6.&#160;Host Controller APIs"><link rel="prev" href="API-usb-hcd-unlink-urb-from-ep.html" title="usb_hcd_unlink_urb_from_ep"><link rel="next" href="API-usb-alloc-streams.html" title="usb_alloc_streams"></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_hcd_giveback_urb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-usb-hcd-unlink-urb-from-ep.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;6.&#160;Host Controller APIs</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-usb-alloc-streams.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-usb-hcd-giveback-urb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_hcd_giveback_urb &#8212; 
2     return URB from HCD to device driver
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_hcd_giveback_urb </b>(</code></td><td>struct usb_hcd * <var class="pdparam">hcd</var>, </td></tr><tr><td>&#160;</td><td>struct urb * <var class="pdparam">urb</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">status</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1116761012"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>hcd</code></em></span></dt><dd><p>
4     host controller returning the URB
5    </p></dd><dt><span class="term"><em class="parameter"><code>urb</code></em></span></dt><dd><p>
6     urb being returned to the USB device driver.
7    </p></dd><dt><span class="term"><em class="parameter"><code>status</code></em></span></dt><dd><p>
8     completion status code for the URB.
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1116764700"></a><h2>Context</h2><p>
10   <code class="function">in_interrupt</code>
11</p></div><div class="refsect1"><a name="idp1116765644"></a><h2>Description</h2><p>
12   This hands the URB from HCD to its USB device driver, using its
13   completion function.  The HCD has freed all per-urb resources
14   (and is done using urb-&gt;hcpriv).  It also released all HCD locks;
15   the device driver won't cause problems if it frees, modifies,
16   or resubmits this URB.
17   </p><p>
18
19   If <em class="parameter"><code>urb</code></em> was unlinked, the value of <em class="parameter"><code>status</code></em> will be overridden by
20   <em class="parameter"><code>urb</code></em>-&gt;unlinked.  Erroneous short transfers are detected in case
21   the HCD hasn't checked for them.
22</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-hcd-unlink-urb-from-ep.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="hcd.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-usb-alloc-streams.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">usb_hcd_unlink_urb_from_ep</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_alloc_streams</span></td></tr></table></div></body></html>
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