1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index c94026768570..850d02a7a925 100644
--- a/drivers/hid/hid-debug.c
+++ b/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);