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Commit 0bf02ce6 authored by Mike Frysinger's avatar Mike Frysinger
Browse files

Blackfin: time-ts: ack gptimer sooner to avoid missing short ints 



If the period of a gptimer is fairly low, we might miss an interrupt
by acking it too late (we end up acking the new int as well).

Reported-by: default avatarIsabelle Leonardi <i.leonardi@detracom.fr>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent ce24ee46

arch/blackfin/kernel/time-ts.c

+7 −1
Original line number Original line Diff line number Diff line
@@ -206,8 +206,14 @@ irqreturn_t bfin_gptmr0_interrupt(int irq, void *dev_id) 
{

{

	struct clock_event_device *evt = dev_id;

	struct clock_event_device *evt = dev_id;

	smp_mb();

	smp_mb();

	evt->event_handler(evt);

	/*

	 * We want to ACK before we handle so that we can handle smaller timer

	 * intervals.  This way if the timer expires again while we're handling

	 * things, we're more likely to see that 2nd int rather than swallowing

	 * it by ACKing the int at the end of this handler.

	 */

	bfin_gptmr0_ack();

	bfin_gptmr0_ack();

	evt->event_handler(evt);

	return IRQ_HANDLED;

	return IRQ_HANDLED;

}

}