From: Matt Evans <matt@ozlabs.org>
Date: Tue, 29 Mar 2011 02:40:56 +0000 (+1100)
Subject: xhci: Add an assertion to check for virt_dev=0 bug.
X-Git-Tag: v3.0-rc1~337^2~83^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ed603ecf8b68ab81f4c83097d3063d43ec73bb8;p=pandora-kernel.git

xhci: Add an assertion to check for virt_dev=0 bug.

During a "plug-unplug" stress test on an NEC xHCI card, a null pointer
dereference was observed.  xhci_address_device() dereferenced a null
virt_dev (possibly an erroneous udev->slot_id?); this patch adds a WARN_ON &
message to aid debug if it can be recreated.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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