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authorArjan van de Ven <arjan@infradead.org>2008-11-23 22:35:57 -0500
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2008-11-24 11:36:38 -0500
commit8442c87d2f6c73cdc9a391e4dd9390523d242bda (patch)
treeaa2ad9cc222dfbe7b605675707d68288800823f3
parent5f4ba04ffd8fc9f6b15b92270ef0517ae52dcf3a (diff)
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: Dmitry Torokhov <dtor@mail.ru>
-rw-r--r--drivers/input/ff-memless.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c
index 6790e975a98..bc4e40f3ede 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;
}