HID: hiddev: fix error path in hiddev_read when interrupted

hiddev_read: in case mutex_lock_interruptible will be interrupted
remove the task from the wait queue.
Signed-off-by: NPeter Waechtler <pwaechtler@mac.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/usbhid/hiddev.c

@@ -367,8 +367,10 @@ static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t coun
 				/* let O_NONBLOCK tasks run */
 				mutex_unlock(&list->thread_lock);
 				schedule();
-				if (mutex_lock_interruptible(&list->thread_lock))
+				if (mutex_lock_interruptible(&list->thread_lock)) {
+					finish_wait(&list->hiddev->wait, &wait);
 					return -EINTR;
+				}
 				set_current_state(TASK_INTERRUPTIBLE);
 			}
 			finish_wait(&list->hiddev->wait, &wait);