1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>drm_noop</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux GPU Driver Developer's Guide"><link rel="up" href="ch02s08.html#id-1.3.4.12.4" title="IOCTLs"><link rel="prev" href="ch02s08.html" title="Open/Close, File Operations and IOCTLs"><link rel="next" href="API-drm-invalid-op.html" title="drm_invalid_op"></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_noop</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch02s08.html">Prev</a> </td><th width="60%" align="center">IOCTLs</th><td width="20%" align="right"> <a accesskey="n" href="API-drm-invalid-op.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-noop"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_noop — 
2  DRM no-op ioctl implemntation
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">drm_noop </b>(</code></td><td>struct drm_device * <var class="pdparam">dev</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">data</var>, </td></tr><tr><td> </td><td>struct drm_file * <var class="pdparam">file_priv</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.3.4.12.4.6.5"></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     DRM device for the ioctl
5    </p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
6     data pointer for the ioctl
7    </p></dd><dt><span class="term"><em class="parameter"><code>file_priv</code></em></span></dt><dd><p>
8     DRM file for the ioctl call
9    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.3.4.12.4.6.6"></a><h2>Description</h2><p>
10   This no-op implementation for drm ioctls is useful for deprecated
11   functionality where we can't return a failure code because existing userspace
12   checks the result of the ioctl, but doesn't care about the action.
13   </p><p>
14
15   Always returns successfully with 0.
16</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch02s08.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02s08.html#id-1.3.4.12.4">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-drm-invalid-op.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Open/Close, File Operations and IOCTLs </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">drm_invalid_op</span></td></tr></table></div></body></html>
17