diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2008-11-24 03:57:36 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-30 21:36:51 +0300 |
| commit | 211f05a034f49586fdd071abd174853217ec29ee (patch) | |
| tree | a23a1dd79b65049855e9344df42305442aa2a170 /drivers | |
| parent | 02d0e6753d8ab0173b63338157929e52eac86d12 (diff) | |
| download | linux-211f05a034f49586fdd071abd174853217ec29ee.tar.xz | |
input: replace spin_lock_bh with spin_lock_irqsave in ml_ff_playback
ml_ff_playback() uses spin_(un)lock_bh. However this function is called
with interrupts disabled from erase_effect() in drivers/input/ff-core.c:196.
This is not permitted, and will result in a WARN_ON in the bottom half handling code.
This patch changes this function to just use spin_lock_irqsave() instead, solving
the problem and simplifying the locking logic.
This was reported as entry #106559 in kerneloops.org
Reported-by: kerneloops.org
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/ff-memless.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c index 6790e975a98c..bc4e40f3ede7 100644 --- a/drivers/input/ff-memless.c +++ b/drivers/input/ff-memless.c @@ -397,8 +397,9 @@ static int ml_ff_playback(struct input_dev *dev, int effect_id, int value) { struct ml_device *ml = dev->ff->private; struct ml_effect_state *state = &ml->states[effect_id]; + unsigned long flags; - spin_lock_bh(&ml->timer_lock); + spin_lock_irqsave(&ml->timer_lock, flags); if (value > 0) { debug("initiated play"); @@ -424,7 +425,7 @@ static int ml_ff_playback(struct input_dev *dev, int effect_id, int value) ml_play_effects(ml); } - spin_unlock_bh(&ml->timer_lock); + spin_unlock_irqrestore(&ml->timer_lock, flags); return 0; } |