From: Willem Penninckx <willem.penninckx@cs.kuleuven.be>
Date: Wed, 23 Nov 2011 10:25:34 +0000 (+0100)
Subject: HID: usbkbd: synchronize LED URB submission
X-Git-Tag: v3.3-rc1~123^2~1^4~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c196adf87514560f867492978ae350d4bbced0bd;p=pandora-kernel.git

HID: usbkbd: synchronize LED URB submission

usb_kbd_event() and usb_kbd_led() can be called concurrently, but they are not
synchronized. They both readwrite kbd->leds, and usb_kbd_event() originally just
checked the URB status field, while urb.h states that "It [status field] should
not be examined before the URB is returned to the completion handler."

To fix this unsynchronized behavior, this patch introduces a boolean
representing whether the URB is submitted, and a spinlock.

Signed-off-by: Willem Penninckx <willem.penninckx@cs.kuleuven.be>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

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