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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>get_ccwdev_by_busid</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Writing s390 channel device drivers" /><link rel="up" href="ch02s02.html" title="ccw devices" /><link rel="prev" href="re15.html" title="ccw_device_set_online" /><link rel="next" href="re17.html" title="ccw_driver_register" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>get_ccwdev_by_busid</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re15.html">Prev</a> </td><th width="60%" align="center">ccw devices</th><td width="20%" align="right"> <a accesskey="n" href="re17.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="get_ccwdev_by_busid"><a id="API-get-ccwdev-by-busid"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>get_ccwdev_by_busid —
obtain device from a bus id
</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">struct ccw_device * <b class="fsfunc">get_ccwdev_by_busid </b>(</code></td><td>struct ccw_driver * <var class="pdparam">cdrv</var>, </td></tr><tr><td> </td><td>const char * <var class="pdparam">bus_id</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2575362"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>cdrv</code></em></span></dt><dd><p>
driver the device is owned by
</p></dd><dt><span class="term"><em class="parameter"><code>bus_id</code></em></span></dt><dd><p>
bus id of the device to be searched
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2575406"></a><h2>Description</h2><p>
This function searches all devices owned by <em class="parameter"><code>cdrv</code></em> for a device with a bus
id matching <em class="parameter"><code>bus_id</code></em>.
</p></div><div class="refsect1" title="Returns"><a id="id2575427"></a><h2>Returns</h2><p>
If a match is found, its reference count of the found device is increased
and it is returned; else <code class="constant">NULL</code> is returned.
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