<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>usb_init_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="ch05.html" title="Chapter 5. USB Core APIs" /><link rel="prev" href="ch05.html" title="Chapter 5. USB Core APIs" /><link rel="next" href="re42.html" title="usb_alloc_urb" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>usb_init_urb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch05.html">Prev</a> </td><th width="60%" align="center">Chapter 5. USB Core APIs</th><td width="20%" align="right"> <a accesskey="n" href="re42.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="usb_init_urb"><a id="API-usb-init-urb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_init_urb —
initializes a urb so that it can be used by a USB 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_init_urb </b>(</code></td><td>struct urb * <var class="pdparam">urb</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3107335"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>urb</code></em></span></dt><dd><p>
pointer to the urb to initialize
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3107362"></a><h2>Description</h2><p>
Initializes a urb so that the USB subsystem can use it properly.
</p><p>
If a urb is created with a call to <code class="function">usb_alloc_urb</code> it is not
necessary to call this function. Only use this if you allocate the
space for a struct urb on your own. If you call this function, be
careful when freeing the memory for your urb that it is no longer in
use by the USB core.
</p><p>
Only use this function if you _really_ understand what you are doing.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch05.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch05.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re42.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 5. USB Core APIs </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>usb_alloc_urb</span></td></tr></table></div></body></html>
