From 705a76d2d22a2824f45f07d023a380293554e989 Mon Sep 17 00:00:00 2001
From: Thierry Reding <thierry.reding@avionic-design.de>
Date: Mon, 11 May 2009 08:36:39 -0700
Subject: [PATCH] Input: tsc2007 - fix locking in hrtimer handler
Now that hrtimers are always running in hard irq context we can't
unconditionally enable interrupts at the end of the timer function.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Kwangwoo Lee <kwangwoo.lee@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---
drivers/input/touchscreen/tsc2007.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index 536668fbda22..948e167557f1 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -200,8 +200,9 @@ static int tsc2007_read_values(struct tsc2007 *tsc)
static enum hrtimer_restart tsc2007_timer(struct hrtimer *handle)
{
struct tsc2007 *ts = container_of(handle, struct tsc2007, timer);
+ unsigned long flags;
- spin_lock_irq(&ts->lock);
+ spin_lock_irqsave(&ts->lock, flags);
if (unlikely(!ts->get_pendown_state() && ts->pendown)) {
struct input_dev *input = ts->input;
@@ -222,7 +223,7 @@ static enum hrtimer_restart tsc2007_timer(struct hrtimer *handle)
tsc2007_send_event(ts);
}
- spin_unlock_irq(&ts->lock);
+ spin_unlock_irqrestore(&ts->lock, flags);
return HRTIMER_NORESTART;
}
--
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