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: Peter Waechtler <pwaechtler@mac.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index af0a7c1002af..891ff531cf34 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/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);