1<html><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 V1.78.1"><link rel="home" href="index.html" title="The 802.11 subsystems &#8211; for kernel developers"><link rel="up" href="rx-tx.html" title="Chapter&#160;4.&#160;Receive and transmit processing"><link rel="prev" href="bk02pt01ch04s03.html" title="Packet alignment"><link rel="next" href="bk02pt01ch04s05.html" title="functions/definitions"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><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="bk02pt01ch04s03.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;4.&#160;Receive and transmit processing</th><td width="20%" align="right">&#160;<a accesskey="n" href="bk02pt01ch04s05.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1113578996"></a>Calling into mac80211 from interrupts</h2></div></div></div><p>
2   </p><p>
3   Only <code class="function">ieee80211_tx_status_irqsafe</code> and <code class="function">ieee80211_rx_irqsafe</code> can be
4   called in hardware interrupt context. The low-level driver must not call any
5   other functions in hardware interrupt context. If there is a need for such
6   call, the low-level driver should first ACK the interrupt and perform the
7   IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
8   tasklet function.
9   </p><p>
10   NOTE: If the driver opts to use the <code class="function">_irqsafe</code> functions, it may not also
11   use the non-IRQ-safe functions!
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