1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_dev_ref</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="drmInternals.html#idp1119509092" title="Device Registration"><link rel="prev" href="API-drm-dev-alloc.html" title="drm_dev_alloc"><link rel="next" href="API-drm-dev-unref.html" title="drm_dev_unref"></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">drm_dev_ref</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-dev-alloc.html">Prev</a>&#160;</td><th width="60%" align="center">Device Registration</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-dev-unref.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-dev-ref"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_dev_ref &#8212; 
2     Take reference of a DRM device
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">void <b class="fsfunc">drm_dev_ref </b>(</code></td><td>struct drm_device * <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1122491140"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
4     device to take reference of or NULL
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1122492724"></a><h2>Description</h2><p>
6   This increases the ref-count of <em class="parameter"><code>dev</code></em> by one. You *must* already own a
7   reference when calling this. Use <code class="function">drm_dev_unref</code> to drop this reference
8   again.
9   </p><p>
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11   This function never fails. However, this function does not provide *any*
12   guarantee whether the device is alive or running. It only provides a
13   reference to the object and the memory associated with it.
14</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-drm-dev-alloc.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="drmInternals.html#idp1119509092">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-drm-dev-unref.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_dev_alloc</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">drm_dev_unref</span></td></tr></table></div></body></html>
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