From 3494c16676a21e7e53e21b08a0a469a38df6dcfb Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sat, 24 Feb 2007 22:11:42 -0800 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- kernel/time/tick-common.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index 4500e347f1bb..0986a2bfab49 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -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); } } -- 2.20.1