Messages in this thread | | | Subject | Re: [PATCH v3] clocksource: sun4i: Clear interrupts after stopping timer in probe function | From | Daniel Lezcano <> | Date | Thu, 25 Aug 2016 11:11:31 +0200 |
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On 08/25/2016 08:26 AM, Chen-Yu Tsai wrote: > The bootloader (U-boot) sometimes uses this timer for various delays. > It uses it as a ongoing counter, and does comparisons on the current > counter value. The timer counter is never stopped. > > In some cases when the user interacts with the bootloader, or lets > it idle for some time before loading Linux, the timer may expire, > and an interrupt will be pending. This results in an unexpected > interrupt when the timer interrupt is enabled by the kernel, at > which point the event_handler isn't set yet. This results in a NULL > pointer dereference exception, panic, and no way to reboot. > > Clear any pending interrupts after we stop the timer in the probe > function to avoid this. > > Cc: stable@vger.kernel.org > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > ---
Applied.
Thanks !
-- Daniel
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