From: Bernard Pidoux <redacted>
Date: Sun, 28 Sep 2008 21:56:38 +0200

I propose the following patch to avoid use counter underflow.
However a KERN_WARNING message could be better instead of KERN_ERR.

I don't see any large value in adding this patch right now.
At best it's a new BUG check, it doesn't actually fix the
problem.  I'd rather apply a fix :-)