1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>pci_get_subsys</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-domain-bus-and-slot.html" title="pci_get_domain_bus_and_slot"><link rel="next" href="API-pci-get-device.html" title="pci_get_device"></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_get_subsys</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-pci-get-domain-bus-and-slot.html">Prev</a> </td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right"> <a accesskey="n" href="API-pci-get-device.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-pci-get-subsys"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pci_get_subsys — 2 begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id 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">struct pci_dev * <b class="fsfunc">pci_get_subsys </b>(</code></td><td>unsigned int <var class="pdparam">vendor</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">device</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">ss_vendor</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">ss_device</var>, </td></tr><tr><td> </td><td>struct pci_dev * <var class="pdparam">from</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idp1126770812"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>vendor</code></em></span></dt><dd><p> 4 PCI vendor id to match, or <code class="constant">PCI_ANY_ID</code> to match all vendor ids 5 </p></dd><dt><span class="term"><em class="parameter"><code>device</code></em></span></dt><dd><p> 6 PCI device id to match, or <code class="constant">PCI_ANY_ID</code> to match all device ids 7 </p></dd><dt><span class="term"><em class="parameter"><code>ss_vendor</code></em></span></dt><dd><p> 8 PCI subsystem vendor id to match, or <code class="constant">PCI_ANY_ID</code> to match all vendor ids 9 </p></dd><dt><span class="term"><em class="parameter"><code>ss_device</code></em></span></dt><dd><p> 10 PCI subsystem device id to match, or <code class="constant">PCI_ANY_ID</code> to match all device ids 11 </p></dd><dt><span class="term"><em class="parameter"><code>from</code></em></span></dt><dd><p> 12 Previous PCI device found in search, or <code class="constant">NULL</code> for new search. 13 </p></dd></dl></div></div><div class="refsect1"><a name="idp1126777788"></a><h2>Description</h2><p> 14 Iterates through the list of known PCI devices. If a PCI device is found 15 with a matching <em class="parameter"><code>vendor</code></em>, <em class="parameter"><code>device</code></em>, <em class="parameter"><code>ss_vendor</code></em> and <em class="parameter"><code>ss_device</code></em>, a pointer to its 16 device structure is returned, and the reference count to the device is 17 incremented. Otherwise, <code class="constant">NULL</code> is returned. A new search is initiated by 18 passing <code class="constant">NULL</code> as the <em class="parameter"><code>from</code></em> argument. Otherwise if <em class="parameter"><code>from</code></em> is not <code class="constant">NULL</code>, 19 searches continue from next device on the global list. 20 The reference count for <em class="parameter"><code>from</code></em> is always decremented if it is not <code class="constant">NULL</code>. 21</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-pci-get-domain-bus-and-slot.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch09s05.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-pci-get-device.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">pci_get_domain_bus_and_slot</span> </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">pci_get_device</span></td></tr></table></div></body></html> 22