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<html xmlns="http://www.w3.org/1999/xhtml"><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 V1.75.2" /><link rel="home" href="index.html" title="The Linux-USB Host Side API" /><link rel="up" href="ch06.html" title="Chapter 6. Host Controller APIs" /><link rel="prev" href="re113.html" title="usb_hcd_unlink_urb_from_ep" /><link rel="next" href="re115.html" title="usb_hcd_resume_root_hub" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>usb_hcd_giveback_urb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re113.html">Prev</a> </td><th width="60%" align="center">Chapter 6. Host Controller APIs</th><td width="20%" align="right"> <a accesskey="n" href="re115.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="usb_hcd_giveback_urb"><a id="API-usb-hcd-giveback-urb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_hcd_giveback_urb —
return URB from HCD to device driver
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><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> </td><td>struct urb * <var class="pdparam">urb</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">status</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2755546"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>hcd</code></em></span></dt><dd><p>
host controller returning the URB
</p></dd><dt><span class="term"><em class="parameter"><code>urb</code></em></span></dt><dd><p>
urb being returned to the USB device driver.
</p></dd><dt><span class="term"><em class="parameter"><code>status</code></em></span></dt><dd><p>
completion status code for the URB.
</p></dd></dl></div></div><div class="refsect1" title="Context"><a id="id2755607"></a><h2>Context</h2><p>
<code class="function">in_interrupt</code>
</p></div><div class="refsect1" title="Description"><a id="id2755623"></a><h2>Description</h2><p>
This hands the URB from HCD to its USB device driver, using its
completion function. The HCD has freed all per-urb resources
(and is done using urb->hcpriv). It also released all HCD locks;
the device driver won't cause problems if it frees, modifies,
or resubmits this URB.
</p><p>
If <em class="parameter"><code>urb</code></em> was unlinked, the value of <em class="parameter"><code>status</code></em> will be overridden by
<em class="parameter"><code>urb</code></em>->unlinked. Erroneous short transfers are detected in case
the HCD hasn't checked for them.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re113.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch06.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re115.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>usb_hcd_unlink_urb_from_ep</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>usb_hcd_resume_root_hub</span></td></tr></table></div></body></html>
