From: Peter Waechtler <pwaechtler@mac.com>
Date: Thu, 28 Apr 2011 18:53:58 +0000 (+0200)
Subject: HID: hiddev: fix error path in hiddev_read when interrupted
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=06268b2a384ece73618c1ad7649d19905ab79806;p=deliverable%2Flinux.git

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>
---

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);