redonkable/alistair23-linux
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ath9k: serialize ath9k_hw_setpower calls

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Because ath9k_setpower is called from various contexts, we have to
protect it against concurrent calls.

Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos 2009-07-14 20:17:13 -04:00 committed by John W. Linville
parent ebaa24534e
commit 04717ccd80
3 changed files with 16 additions and 1 deletions
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1
drivers/net/wireless/ath/ath9k/ath9k.h
View file

@ -559,6 +559,7 @@ struct ath_softc {
spinlock_t sc_resetlock;
spinlock_t sc_serial_rw;
spinlock_t ani_lock;
spinlock_t sc_pm_lock;
struct mutex mutex;
u8 curbssid[ETH_ALEN];

15
drivers/net/wireless/ath/ath9k/hw.c
View file

@ -2728,7 +2728,8 @@ static bool ath9k_hw_set_power_awake(struct ath_hw *ah, int setChip)
return true;
}
bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
static bool ath9k_hw_setpower_nolock(struct ath_hw *ah,
enum ath9k_power_mode mode)
{
int status = true, setChip = true;
static const char *modes[] = {
@ -2762,6 +2763,18 @@ bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
return status;
}
bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
{
unsigned long flags;
bool ret;
spin_lock_irqsave(&ah->ah_sc->sc_pm_lock, flags);
ret = ath9k_hw_setpower_nolock(ah, mode);
spin_unlock_irqrestore(&ah->ah_sc->sc_pm_lock, flags);
return ret;
}
/*
* Helper for ASPM support.
*

1
drivers/net/wireless/ath/ath9k/main.c
View file

@ -1316,6 +1316,7 @@ static int ath_init(u16 devid, struct ath_softc *sc)
spin_lock_init(&sc->sc_resetlock);
spin_lock_init(&sc->sc_serial_rw);
spin_lock_init(&sc->ani_lock);
spin_lock_init(&sc->sc_pm_lock);
mutex_init(&sc->mutex);
tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,