<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Calling into mac80211 from interrupts</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The mac80211 subsystem for kernel developers" /><link rel="up" href="ch04.html" title="Chapter 4. Receive and transmit processing" /><link rel="prev" href="ch04s03.html" title="Packet alignment" /><link rel="next" href="ch04s05.html" title="functions/definitions" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Calling into mac80211 from interrupts</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s03.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Receive and transmit processing</th><td width="20%" align="right"> <a accesskey="n" href="ch04s05.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Calling into mac80211 from interrupts"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id2707531"></a>Calling into mac80211 from interrupts</h2></div></div></div><p> </p><p> Only <code class="function">ieee80211_tx_status_irqsafe</code> and <code class="function">ieee80211_rx_irqsafe</code> can be called in hardware interrupt context. The low-level driver must not call any other functions in hardware interrupt context. If there is a need for such call, the low-level driver should first ACK the interrupt and perform the IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even tasklet function. </p><p> NOTE: If the driver opts to use the <code class="function">_irqsafe</code> functions, it may not also use the non-IRQ-safe functions! </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch04s03.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch04s05.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Packet alignment </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> functions/definitions</td></tr></table></div></body></html>
