Commit b5f03956 authored by Bob Copeland's avatar Bob Copeland Committed by John W. Linville
Browse files

ath5k: use spin_lock_irqsave for beacon lock



ath5k_reset can be called from process context, which in turn can
call ath5k_beacon_config which takes the sc->block spinlock.  Since
it can also be taken in hard irq context, use spin_lock_irqsave
everywhere.  This fixes a potential deadlock in adhoc mode.

Changes-licensed-under: 3-Clause-BSD

Cc: stable@kernel.org
Signed-off-by: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 0b6f582b
......@@ -1700,7 +1700,6 @@ ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
}
}
static void
ath5k_tasklet_rx(unsigned long data)
{
......@@ -2216,6 +2215,7 @@ static void
ath5k_beacon_config(struct ath5k_softc *sc)
{
struct ath5k_hw *ah = sc->ah;
unsigned long flags;
ath5k_hw_set_imr(ah, 0);
sc->bmisscount = 0;
......@@ -2237,9 +2237,9 @@ ath5k_beacon_config(struct ath5k_softc *sc)
if (sc->opmode == NL80211_IFTYPE_ADHOC) {
if (ath5k_hw_hasveol(ah)) {
spin_lock(&sc->block);
spin_lock_irqsave(&sc->block, flags);
ath5k_beacon_send(sc);
spin_unlock(&sc->block);
spin_unlock_irqrestore(&sc->block, flags);
}
} else
ath5k_beacon_update_timers(sc, -1);
......
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