diff options
Diffstat (limited to 'package/kernel/mac80211/patches/329-ath9k-fix-race-condition-in-irq-processing-during-ha.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/329-ath9k-fix-race-condition-in-irq-processing-during-ha.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/package/kernel/mac80211/patches/329-ath9k-fix-race-condition-in-irq-processing-during-ha.patch b/package/kernel/mac80211/patches/329-ath9k-fix-race-condition-in-irq-processing-during-ha.patch deleted file mode 100644 index 69b21e7284..0000000000 --- a/package/kernel/mac80211/patches/329-ath9k-fix-race-condition-in-irq-processing-during-ha.patch +++ /dev/null @@ -1,53 +0,0 @@ -From: Felix Fietkau <nbd@openwrt.org> -Date: Wed, 14 Jan 2015 14:13:15 +0100 -Subject: [PATCH] ath9k: fix race condition in irq processing during hardware - reset - -To fix invalid hardware accesses, the commit -"ath9k: do not access hardware on IRQs during reset" made the irq -handler ignore interrupts emitted after queueing a hardware reset (which -disables the IRQ). This left a small time window for the IRQ to get -re-enabled by the tasklet, which caused IRQ storms. -Instead of returning IRQ_NONE when ATH_OP_HW_RESET is set, disable the -IRQ entirely for the duration of the reset. - -Signed-off-by: Felix Fietkau <nbd@openwrt.org> ---- - ---- a/drivers/net/wireless/ath/ath9k/main.c -+++ b/drivers/net/wireless/ath/ath9k/main.c -@@ -285,6 +285,7 @@ static int ath_reset_internal(struct ath - - __ath_cancel_work(sc); - -+ disable_irq(sc->irq); - tasklet_disable(&sc->intr_tq); - tasklet_disable(&sc->bcon_tasklet); - spin_lock_bh(&sc->sc_pcu_lock); -@@ -331,6 +332,7 @@ static int ath_reset_internal(struct ath - r = -EIO; - - out: -+ enable_irq(sc->irq); - spin_unlock_bh(&sc->sc_pcu_lock); - tasklet_enable(&sc->bcon_tasklet); - tasklet_enable(&sc->intr_tq); -@@ -512,9 +514,6 @@ irqreturn_t ath_isr(int irq, void *dev) - if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags)) - return IRQ_NONE; - -- 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; -@@ -529,7 +528,7 @@ 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)) -+ if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) - return IRQ_HANDLED; - - /* |