[PATCH] irq-bcm2836: Prevent spurious interrupts, and trap them early

[Eric Anholt]

Eric Anholt <eric at anholt.net> writes:

> From: Phil Elwell <phil at raspberrypi.org>
>
> The old arch-specific IRQ macros included a dsb to ensure the
> write to clear the mailbox interrupt completed before returning
> from the interrupt. The BCM2836 irqchip driver needs the same
> precaution to avoid spurious interrupts.
>
> Spurious interrupts are still possible for other reasons,
> though, so trap them early.
>
> Signed-off-by: Phil Elwell <phil at raspberrypi.org>
> Signed-off-by: Eric Anholt <eric at anholt.net>
> ---
>
> Phil, your patch didn't apply because it looks like you pasted into
> gmail (tabs got converted to spaces).  git-send-email can avoid that.
> I've pulled it out of the rpi tree and applied the s-o-b from your
> email.
>
> Also, patches to lkml need to be sent to the relevant maintainers or
> they won't get picked up.  ./scripts/get_maintainer.pl <patch> can
> give you the list of who to send to/cc.

And then it was my turn to fumble a patch email.  Autocompleted the
wrong version(s).  Resending :(