---

yaml --- r: 242557 b: refs/heads/master c: a0fa220 h: refs/heads/master i: 242555: 9df6988 v: v3
git-mirror · Mar 24, 2011 · 456d995 · 456d995
1 parent c88bd23
commit 456d995
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Showing 2 changed files with 11 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 903427955b9ffe1ca4b76c510089774c3b7a4a8a
+refs/heads/master: a0fa2206f550066d6948d43c5401e973e5f7d320
diff --git a/trunk/drivers/input/touchscreen/tsc2005.c b/trunk/drivers/input/touchscreen/tsc2005.c
@@ -477,7 +477,14 @@ static void tsc2005_esd_work(struct work_struct *work)
 	int error;
 	u16 r;
 
-	mutex_lock(&ts->mutex);
+	if (!mutex_trylock(&ts->mutex)) {
+		/*
+		 * If the mutex is taken, it means that disable or enable is in
+		 * progress. In that case just reschedule the work. If the work
+		 * is not needed, it will be canceled by disable.
+		 */
+		goto reschedule;
+	}
 
 	if (time_is_after_jiffies(ts->last_valid_interrupt +
 				  msecs_to_jiffies(ts->esd_timeout)))
@@ -510,11 +517,12 @@ static void tsc2005_esd_work(struct work_struct *work)
 	tsc2005_start_scan(ts);
 
 out:
+	mutex_unlock(&ts->mutex);
+reschedule:
 	/* re-arm the watchdog */
 	schedule_delayed_work(&ts->esd_work,
 			      round_jiffies_relative(
 					msecs_to_jiffies(ts->esd_timeout)));
-	mutex_unlock(&ts->mutex);
 }
 
 static int tsc2005_open(struct input_dev *input)