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HID: hiddev: fix error path in hiddev_read when interrupted

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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>
This commit is contained in:
Peter Waechtler 2011-04-28 20:53:58 +02:00 committed by Jiri Kosina
parent 35dca5b4a6
commit 06268b2a38
1 changed files with 3 additions and 1 deletions
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4
drivers/hid/usbhid/hiddev.c
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@ -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);