[PATCH] ARM: perf: do not handle deleted counter in irq handler to avoid oops

[Ming Lei]

On Tue, Feb 21, 2012 at 11:19 PM, Will Deacon <will.deacon at arm.com> wrote:
> On Tue, Feb 21, 2012 at 02:02:32PM +0000, Ming Lei wrote:
>> On Tue, Feb 21, 2012 at 9:32 PM, Will Deacon <will.deacon at arm.com> wrote:
>> > I have a couple of patches that solve this by (a) clearing the overflow flag
>> > when disabling the counter for ARMv7 and (b) adding the event checks to the
>>
>> Maybe ARMv6 and xscale need to be fixed too if the overflow flag will be kept
>> even after the counter is disabled.
>
> I don't think so - seems like we clear the overflow flag already for those
> PMUs in the disable path (note that we write ~mask).

mask is only the counters enable bits, both v6 and xscale don't clear their
overflow flag in disable callback.


thanks,
-- 
Ming Lei