mirror of https://github.com/hak5/openwrt-owl.git
62 lines
1.9 KiB
Diff
62 lines
1.9 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
|
|
Date: Thu, 13 Nov 2014 18:29:26 +0100
|
|
Subject: [PATCH] ath9k: do not access hardware on IRQs during reset
|
|
|
|
Instead of killing interrupts during reset when the first one happens,
|
|
kill them before issuing the reset.
|
|
This fixes an easy to reproduce crash with multiple cards sharing the
|
|
same IRQ.
|
|
|
|
Cc: stable@vger.kernel.org
|
|
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
|
---
|
|
|
|
--- a/drivers/net/wireless/ath/ath9k/main.c
|
|
+++ b/drivers/net/wireless/ath/ath9k/main.c
|
|
@@ -512,16 +512,13 @@ irqreturn_t ath_isr(int irq, void *dev)
|
|
if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
|
|
return IRQ_NONE;
|
|
|
|
- /* shared irq, not for us */
|
|
+ if (!AR_SREV_9100(ah) && test_bit(ATH_OP_HW_RESET, &common->op_flags))
|
|
+ return IRQ_NONE;
|
|
|
|
+ /* shared irq, not for us */
|
|
if (!ath9k_hw_intrpend(ah))
|
|
return IRQ_NONE;
|
|
|
|
- if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
|
|
- ath9k_hw_kill_interrupts(ah);
|
|
- return IRQ_HANDLED;
|
|
- }
|
|
-
|
|
/*
|
|
* Figure out the reason(s) for the interrupt. Note
|
|
* that the hal returns a pseudo-ISR that may include
|
|
@@ -532,6 +529,9 @@ irqreturn_t ath_isr(int irq, void *dev)
|
|
ath9k_debug_sync_cause(sc, sync_cause);
|
|
status &= ah->imask; /* discard unasked-for bits */
|
|
|
|
+ if (AR_SREV_9100(ah) && test_bit(ATH_OP_HW_RESET, &common->op_flags))
|
|
+ return IRQ_HANDLED;
|
|
+
|
|
/*
|
|
* If there are no status bits set, then this interrupt was not
|
|
* for me (should have been caught above).
|
|
@@ -613,6 +613,7 @@ int ath_reset(struct ath_softc *sc, stru
|
|
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
|
|
int r;
|
|
|
|
+ ath9k_hw_kill_interrupts(sc->sc_ah);
|
|
set_bit(ATH_OP_HW_RESET, &common->op_flags);
|
|
|
|
ath9k_ps_wakeup(sc);
|
|
@@ -633,6 +634,7 @@ void ath9k_queue_reset(struct ath_softc
|
|
#ifdef CPTCFG_ATH9K_DEBUGFS
|
|
RESET_STAT_INC(sc, type);
|
|
#endif
|
|
+ ath9k_hw_kill_interrupts(sc->sc_ah);
|
|
set_bit(ATH_OP_HW_RESET, &common->op_flags);
|
|
ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
|
|
}
|