ALSA: hrtimer - Fix lock-up

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The timer stop callback can be called from snd_timer_interrupt(), which
is called from the hrtimer callback.  Since hrtimer_cancel() waits for
the callback completion, this eventually results in a lock-up.

This patch fixes the problem by just toggling a flag at stop callback
and call hrtimer_cancel() later.

Reported-and-tested-by: Wojtek Zabolotny <W.Zabolotny@elka.pw.edu.pl>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Iwai 2009-12-11 12:51:05 +01:00

parent 5f60e49608

commit fcfdebe707

1 changed files with 13 additions and 2 deletions

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15

sound/core/hrtimer.c

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