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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>Destructor</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Writing an ALSA Driver" /><link rel="up" href="ch02.html" title="Chapter 2. Basic Flow for PCI Drivers" /><link rel="prev" href="ch02s03.html" title="Constructor" /><link rel="next" href="ch02s05.html" title="Header Files" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Destructor</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch02s03.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Basic Flow for PCI Drivers</th><td width="20%" align="right"> <a accesskey="n" href="ch02s05.html">Next</a></td></tr></table><hr /></div><div class="section" title="Destructor"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="basic-flow-destructor"></a>Destructor</h2></div></div></div><p>
The destructor, remove callback, simply releases the card
instance. Then the ALSA middle layer will release all the
attached components automatically.
</p><p>
It would be typically like the following:
</p><div class="informalexample"><pre class="programlisting">
static void __devexit snd_mychip_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
</pre></div><p>
The above code assumes that the card pointer is set to the PCI
driver data.
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