[PATCH] clocksource: mtk: Fix race conditions in probe code

[Daniel Lezcano]

On 02/19/2015 11:41 AM, Matthias Brugger wrote:
> We have two race conditions in the probe code which could lead to a null
> pointer dereference in the interrupt handler.
>
> The interrupt handler accesses the clockevent device, which may not yet be
> registered.
>
> First race condition happens when the interrupt handler gets registered before
> the interrupts get disabled. The second race condition happens when the
> interrupts get enabled, but the clockevent device is not yet registered.
>
> Fix that by disabling the interrupts before we register the interrupt and enable
> the interrupts after the clockevent device got registered.
>
> Reported-by: Gongbae Park <yongbae2 at gmail.com>
> Signed-off-by: Matthias Brugger <matthias.bgg at gmail.com>
> Cc: stable at vger.kernel.org
> ---

Applied to my tree as a fix for 3.20.

Thanks !

   -- Daniel

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