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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>__pci_reset_function</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><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="re365.html" title="pci_msi_off" /><link rel="next" href="re367.html" title="pci_reset_function" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>__pci_reset_function</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re365.html">Prev</a> </td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right"> <a accesskey="n" href="re367.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="__pci_reset_function"><a id="API---pci-reset-function"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__pci_reset_function —
reset a PCI device function
</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">__pci_reset_function </b>(</code></td><td>struct pci_dev * <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3006495"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
PCI device to reset
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3006522"></a><h2>Description</h2><p>
Some devices allow an individual function to be reset without affecting
other functions in the same device. The PCI device must be responsive
to PCI config space in order to use this function.
</p><p>
The device function is presumed to be unused when this function is called.
Resetting the device will make the contents of PCI configuration space
random, so any caller of this must be prepared to reinitialise the
device including MSI, bus mastering, BARs, decoding IO and memory spaces,
etc.
</p><p>
Returns 0 if the device function was successfully reset or negative if the
device doesn't support resetting a single function.
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