From: Pavel Machek <pavel@suse.cz>
Date: Fri, 2 May 2008 23:45:10 +0000 (-0700)
Subject: hci_usb.h: fix hard-to-trigger race
X-Git-Tag: v2.6.26-rc1~5^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=026672d0997c911c9bef9aabe862884fc0add106;p=pandora-kernel.git

hci_usb.h: fix hard-to-trigger race

If someone tries to _urb_unlink while _urb_queue_head is running, he'll see
_urb->queue == NULL and fail to do any locking.  Prevent that from happening
by strategically placed barriers.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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