Felix Fietkau <nbd@xxxxxxxxxxx> writes:
> 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@xxxxxxxxxxx>
Thanks, applied to wireless-drivers.git. I made a small change and added
the commit id to the commit log:
commit e3f31175a3eeb492a6ab788e4fa136c19b43aab4
Author: Felix Fietkau <nbd@xxxxxxxxxxx>
Date: Wed Jan 14 14:17:36 2015 +0100
ath9k: fix race condition in irq processing during hardware reset
To fix invalid hardware accesses, the commit 872b5d814f99 ("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@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
--
Kalle Valo
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