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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>dev_open</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs" /><link rel="up" href="ch02.html#id2748878" title="Driver Support" /><link rel="prev" href="re210.html" title="dev_load" /><link rel="next" href="re212.html" title="dev_close" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>dev_open</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re210.html">Prev</a> </td><th width="60%" align="center">Driver Support</th><td width="20%" align="right"> <a accesskey="n" href="re212.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="dev_open"><a id="API-dev-open"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>dev_open —
prepare an interface for use.
</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">dev_open </b>(</code></td><td>struct net_device * <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2751076"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
device to open
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2751102"></a><h2>Description</h2><p>
Takes a device from down to up state. The device's private open
function is invoked and then the multicast lists are loaded. Finally
the device is moved into the up state and a <code class="constant">NETDEV_UP</code> message is
sent to the netdev notifier chain.
</p><p>
Calling this function on an active interface is a nop. On a failure
a negative errno code is returned.
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