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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>parport_remove_port</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="ch03.html" title="Chapter 3. Parallel Port Devices" /><link rel="prev" href="re289.html" title="parport_announce_port" /><link rel="next" href="re291.html" title="parport_register_device" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>parport_remove_port</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re289.html">Prev</a> </td><th width="60%" align="center">Chapter 3. Parallel Port Devices</th><td width="20%" align="right"> <a accesskey="n" href="re291.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="parport_remove_port"><a id="API-parport-remove-port"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>parport_remove_port —
deregister a parallel port
</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">parport_remove_port </b>(</code></td><td>struct parport * <var class="pdparam">port</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2636349"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>port</code></em></span></dt><dd><p>
parallel port to deregister
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2636376"></a><h2>Description</h2><p>
When a parallel port driver is forcibly unloaded, or a
parallel port becomes inaccessible, the port driver must call
this function in order to deal with device drivers that still
want to use it.
</p><p>
The parport structure associated with the port has its
operations structure replaced with one containing 'null'
operations that return errors or just don't do anything.
</p><p>
Any drivers that have registered themselves using
<code class="function">parport_register_driver</code> are notified that the port is no
longer accessible by having their <code class="function">detach</code> routines called
with <em class="parameter"><code>port</code></em> as the parameter.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re289.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re291.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>parport_announce_port</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>parport_register_device</span></td></tr></table></div></body></html>
