1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>scsi_internal_device_block</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="SCSI Interfaces Guide"><link rel="up" href="mid_layer.html#scsi_lib.c" title="drivers/scsi/scsi_lib.c"><link rel="prev" href="API-scsi-device-resume.html" title="scsi_device_resume"><link rel="next" href="API-scsi-internal-device-unblock.html" title="scsi_internal_device_unblock"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">scsi_internal_device_block</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-scsi-device-resume.html">Prev</a>&#160;</td><th width="60%" align="center">drivers/scsi/scsi_lib.c</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-scsi-internal-device-unblock.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-scsi-internal-device-block"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>scsi_internal_device_block &#8212; 
2     internal function to put a device temporarily into the SDEV_BLOCK state
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">scsi_internal_device_block </b>(</code></td><td>struct scsi_device * <var class="pdparam">sdev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123953396"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>sdev</code></em></span></dt><dd><p>
4     device to block
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123954924"></a><h2>Description</h2><p>
6   Block request made by scsi lld's to temporarily stop all
7   scsi commands on the specified device.  Called from interrupt
8   or normal process context.
9   </p><p>
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11   Returns zero if successful or error if not
12</p></div><div class="refsect1"><a name="idp1123955852"></a><h2>Notes</h2><p>
13   </p><p>
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15   This routine transitions the device to the SDEV_BLOCK state
16   (which must be a legal transition).  When the device is in this
17   state, all commands are deferred until the scsi lld reenables
18   the device with scsi_device_unblock or device_block_tmo fires.
19</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-scsi-device-resume.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="mid_layer.html#scsi_lib.c">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-scsi-internal-device-unblock.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">scsi_device_resume</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">scsi_internal_device_unblock</span></td></tr></table></div></body></html>
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