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>

diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index 536668f..948e167 100644 (file)
--- 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;
 }