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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>trace_irq_handler_exit</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux Kernel Tracepoint API" /><link rel="up" href="ch02.html" title="Chapter 2. IRQ" /><link rel="prev" href="re01.html" title="trace_irq_handler_entry" /><link rel="next" href="re03.html" title="trace_softirq_entry" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>trace_irq_handler_exit</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re01.html">Prev</a> </td><th width="60%" align="center">Chapter 2. IRQ</th><td width="20%" align="right"> <a accesskey="n" href="re03.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="trace_irq_handler_exit"><a id="API-trace-irq-handler-exit"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>trace_irq_handler_exit —
called immediately after the irq action handler returns
</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">void <b class="fsfunc">trace_irq_handler_exit </b>(</code></td><td>int <var class="pdparam">irq</var>, </td></tr><tr><td> </td><td>struct irqaction * <var class="pdparam">action</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">ret</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2890619"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>irq</code></em></span></dt><dd><p>
irq number
</p></dd><dt><span class="term"><em class="parameter"><code>action</code></em></span></dt><dd><p>
pointer to struct irqaction
</p></dd><dt><span class="term"><em class="parameter"><code>ret</code></em></span></dt><dd><p>
return value
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2890679"></a><h2>Description</h2><p>
If the <em class="parameter"><code>ret</code></em> value is set to IRQ_HANDLED, then we know that the corresponding
<em class="parameter"><code>action</code></em>->handler scuccessully handled this irq. Otherwise, the irq might be
a shared irq line, or the irq was not handled successfully. Can be used in
conjunction with the irq_handler_entry to understand irq handler latencies.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re01.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>trace_irq_handler_entry</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>trace_softirq_entry</span></td></tr></table></div></body></html>
