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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>ccw_device_halt</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="re29.html" title="ccw_device_start_timeout" /><link rel="next" href="re31.html" title="ccw_device_resume" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>ccw_device_halt</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re29.html">Prev</a> </td><th width="60%" align="center">ccw devices</th><td width="20%" align="right"> <a accesskey="n" href="re31.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="ccw_device_halt"><a id="API-ccw-device-halt"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ccw_device_halt —
halt I/O request processing
</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">int <b class="fsfunc">ccw_device_halt </b>(</code></td><td>struct ccw_device * <var class="pdparam">cdev</var>, </td></tr><tr><td> </td><td>unsigned long <var class="pdparam">intparm</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2577873"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>cdev</code></em></span></dt><dd><p>
target ccw device
</p></dd><dt><span class="term"><em class="parameter"><code>intparm</code></em></span></dt><dd><p>
interruption parameter; value is only used if no I/O is
outstanding, otherwise the intparm associated with the I/O request
is returned
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2577918"></a><h2>Description</h2><p>
<code class="function">ccw_device_halt</code> calls hsch on <em class="parameter"><code>cdev</code></em>'s subchannel.
</p></div><div class="refsect1" title="Returns"><a id="id2577938"></a><h2>Returns</h2><p>
<code class="constant">0</code> on success,
-<code class="constant">ENODEV</code> on device not operational,
-<code class="constant">EINVAL</code> on invalid device state,
-<code class="constant">EBUSY</code> on device busy or interrupt pending.
</p></div><div class="refsect1" title="Context"><a id="id2577963"></a><h2>Context</h2><p>
Interrupts disabled, ccw device lock held
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re29.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02s02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re31.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>ccw_device_start_timeout</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>ccw_device_resume</span></td></tr></table></div></body></html>
