diff --git a/[refs] b/[refs]
index c55c92760ac7..72a3f986840c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6e32819e12ffbd507eced11a1871700a387d5407
+refs/heads/master: ca9fe1588427f246ad4c389b0170b29a432804b6
diff --git a/trunk/drivers/hid/hid-debug.c b/trunk/drivers/hid/hid-debug.c
index c94026768570..850d02a7a925 100644
--- a/trunk/drivers/hid/hid-debug.c
+++ b/trunk/drivers/hid/hid-debug.c
@@ -949,8 +949,8 @@ static ssize_t hid_debug_events_read(struct file *file, char __user *buffer,
 	int ret = 0, len;
 	DECLARE_WAITQUEUE(wait, current);
 
+	mutex_lock(&list->read_mutex);
 	while (ret == 0) {
-		mutex_lock(&list->read_mutex);
 		if (list->head == list->tail) {
 			add_wait_queue(&list->hdev->debug_wait, &wait);
 			set_current_state(TASK_INTERRUPTIBLE);