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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>i2o_scsi_queuecommand</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch04s02.html" title="I2O message devices" /><link rel="prev" href="re542.html" title="i2o_scsi_notify_controller_remove" /><link rel="next" href="re544.html" title="i2o_scsi_abort" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>i2o_scsi_queuecommand</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re542.html">Prev</a> </td><th width="60%" align="center">I2O message devices</th><td width="20%" align="right"> <a accesskey="n" href="re544.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="i2o_scsi_queuecommand"><a id="API-i2o-scsi-queuecommand"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>i2o_scsi_queuecommand —
queue a SCSI command
</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">i2o_scsi_queuecommand </b>(</code></td><td>struct scsi_cmnd * <var class="pdparam">SCpnt</var>, </td></tr><tr><td> </td><td>void (*<var class="pdparam">done</var>)
<code>(</code>struct scsi_cmnd *<code>)</code><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3103616"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>SCpnt</code></em></span></dt><dd><p>
scsi command pointer
</p></dd><dt><span class="term"><em class="parameter"><code>done</code></em></span></dt><dd><p>
callback for completion
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3103660"></a><h2>Description</h2><p>
Issue a scsi command asynchronously. Return 0 on success or 1 if
we hit an error (normally message queue congestion). The only
minor complication here is that I2O deals with the device addressing
so we have to map the bus/dev/lun back to an I2O handle as well
as faking absent devices ourself.
</p></div><div class="refsect1" title="Locks"><a id="id3103675"></a><h2>Locks</h2><p>
takes the controller lock on error path only
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