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[TICK] tick-common: Fix one-shot handling in tick_handle_periodic(). 

When clockevents_program_event() is given an expire time in the
past, it does not update dev->next_event, so this looping code
would loop forever once the first in-the-past expiration time
was used.

Keep advancing "next" locally to fix this bug.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-02-24 22:11:42 -08:00
parent 9e203bcc10
commit 3494c16676
1 changed files with 3 additions and 2 deletions
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5
kernel/time/tick-common.c
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@ -77,6 +77,7 @@ static void tick_periodic(int cpu)
void tick_handle_periodic(struct clock_event_device *dev)
{
int cpu = smp_processor_id();
ktime_t next;
tick_periodic(cpu);
@ -86,12 +87,12 @@ void tick_handle_periodic(struct clock_event_device *dev)
* Setup the next period for devices, which do not have
* periodic mode:
*/
next = ktime_add(dev->next_event, tick_period);
for (;;) {
ktime_t next = ktime_add(dev->next_event, tick_period);
if (!clockevents_program_event(dev, next, ktime_get()))
return;
tick_periodic(cpu);
next = ktime_add(next, tick_period);
}
}