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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>Exit function</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="MTD NAND Driver Programming Interface" /><link rel="up" href="ch04.html" title="Chapter 4. Basic board driver" /><link rel="prev" href="ch04s05.html" title="Init function" /><link rel="next" href="ch05.html" title="Chapter 5. Advanced board driver functions" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Exit function</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s05.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Basic board driver</th><td width="20%" align="right"> <a accesskey="n" href="ch05.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Exit function"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Exit_function"></a>Exit function</h2></div></div></div><p>
The exit function is only neccecary if the driver is
compiled as a module. It releases all resources which
are held by the chip driver and unregisters the partitions
in the MTD layer.
</p><pre class="programlisting">
#ifdef MODULE
static void __exit board_cleanup (void)
{
/* Release resources, unregister device */
nand_release (board_mtd);
/* unmap physical address */
iounmap((void *)baseaddr);
/* Free the MTD device structure */
kfree (board_mtd);
}
module_exit(board_cleanup);
#endif
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