1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>pci_dev_present</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ch09s05.html" title="PCI Support Library"><link rel="prev" href="API-pci-get-class.html" title="pci_get_class"><link rel="next" href="API-pci-msi-vec-count.html" title="pci_msi_vec_count"></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">pci_dev_present</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-pci-get-class.html">Prev</a>&#160;</td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-pci-msi-vec-count.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-pci-dev-present"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pci_dev_present &#8212; 
2     Returns 1 if device matching the device list is present, 0 if not.
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">pci_dev_present </b>(</code></td><td>const struct pci_device_id * <var class="pdparam">ids</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1126812180"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ids</code></em></span></dt><dd><p>
4     A pointer to a null terminated list of struct pci_device_id structures
5     that describe the type of PCI device the caller is trying to find.
6    </p></dd></dl></div></div><div class="refsect1"><a name="idp1126813900"></a><h2>Obvious fact</h2><p>
7   You do not have a reference to any device that might be found
8   by this function, so if that device is removed from the system right after
9   this function is finished, the value will be stale.  Use this function to
10   find devices that are usually built into a system, or for a general hint as
11   to if another device happens to be present at this specific moment in time.
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