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| author | Omair Mohammed Abdullah <omair.m.abdullah@linux.intel.com> | 2012-09-29 12:24:05 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:28:10 +0900 |
| commit | 7aa79b178e05175b39ae94f28289e036f37ac455 (patch) | |
| tree | e3bec2f2a8bc9c7ae27755f5813625d62d5f395d /sound/usb/mixer.c | |
| parent | 6c06bd661d429a77863ed7171ef66728f9d8d46b (diff) | |
| download | kernel_samsung_smdk4412-7aa79b178e05175b39ae94f28289e036f37ac455.tar.gz kernel_samsung_smdk4412-7aa79b178e05175b39ae94f28289e036f37ac455.tar.bz2 kernel_samsung_smdk4412-7aa79b178e05175b39ae94f28289e036f37ac455.zip | |
ALSA: aloop - add locking to timer access
commit d4f1e48bd11e3df6a26811f7a1f06c4225d92f7d upstream.
When the loopback timer handler is running, calling del_timer() (for STOP
trigger) will not wait for the handler to complete before deactivating the
timer. The timer gets rescheduled in the handler as usual. Then a subsequent
START trigger will try to start the timer using add_timer() with a timer pending
leading to a kernel panic.
Serialize the calls to add_timer() and del_timer() using a spin lock to avoid
this.
Signed-off-by: Omair Mohammed Abdullah <omair.m.abdullah@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/usb/mixer.c')
0 files changed, 0 insertions, 0 deletions