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ath9k: Handle fatal interrupts properly

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When a fatal interrupt is received or it is detected that the baseband
has hung, the chip has to be reset immediately.  Otherwise, we end up
processing spurious interrupts. Ensure that we bail out properly in
the ISR when the reset work hasn't completed yet.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2012-06-04 20:24:01 +05:30 committed by John W. Linville
parent 781b14a315
commit b74713d04e
2 changed files with 7 additions and 1 deletions
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1
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -611,6 +611,7 @@ enum sc_op_flags {
SC_OP_TSF_RESET,
SC_OP_ANI_RUN,
SC_OP_PRIM_STA_VIF,
SC_OP_HW_RESET,
};
/* Powersave flags */

7
drivers/net/wireless/ath/ath9k/main.c
View File

@ -218,6 +218,8 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
ath9k_cmn_update_txpow(ah, sc->curtxpow,
sc->config.txpowlimit, &sc->curtxpow);
clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
@ -362,6 +364,7 @@ void ath9k_tasklet(unsigned long data)
RESET_STAT_INC(sc, type);
#endif
set_bit(SC_OP_HW_RESET, &sc->sc_flags);
ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
goto out;
}
@ -438,12 +441,14 @@ irqreturn_t ath_isr(int irq, void *dev)
if (test_bit(SC_OP_INVALID, &sc->sc_flags))
return IRQ_NONE;
/* shared irq, not for us */
if (!ath9k_hw_intrpend(ah))
return IRQ_NONE;
if(test_bit(SC_OP_HW_RESET, &sc->sc_flags))
return IRQ_HANDLED;
/*
* Figure out the reason(s) for the interrupt. Note
* that the hal returns a pseudo-ISR that may include