wil6210: fix spurious interrupts in 3-msi

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Interrupt is set in ICM (ICR & ~IMV) rising trigger.
As the driver masks the IRQ after clearing it, there can
be a race where an additional spurious interrupt is triggered
when the driver unmask the IRQ.
This can happen in case HW triggers an interrupt after the clear
and before the mask.

To prevent the second spurious interrupt the driver needs to mask the
IRQ before reading and clearing it.

Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

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Maya Erez 2019-04-26 18:43:29 +03:00 • committed by Kalle Valo

parent 62acdcfa8b

commit e10b0eddd5

1 changed files with 40 additions and 25 deletions

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drivers/net/wireless/ath/wil6210/interrupt.c

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