netdev - Re: [patch 1/1] hci_usb.h: fix hard-to-trigger race

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Message-Id: <20080502.164537.178111042.davem@davemloft.net>
Date:	Fri, 02 May 2008 16:45:37 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	hidave.darkstar@...il.com, marcel@...tmann.org,
	netdev@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	pavel@....cz, pavel@...e.cz
Subject: Re: [patch 1/1] hci_usb.h: fix hard-to-trigger race

From: akpm@...ux-foundation.org
Date: Fri, 02 May 2008 13:39:55 -0700

> From: Pavel Machek <pavel@....cz>
> 
> 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@...e.cz>
> Cc: Marcel Holtmann <marcel@...tmann.org>
> Cc: Dave Young <hidave.darkstar@...il.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

I know we've been over this, but I'm going to apply this
because as long as the code is in the tree we should take
fixes to identifyable problems.
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