tree 3eed33c09dda5e98e79692e69a1270d48a6f8299
parent 92a3da410aac6e14daaefe13c60368ca28e85830
author Matt Evans <matt@ozlabs.org> 1301366456 +1100
committer Sarah Sharp <sarah.a.sharp@linux.intel.com> 1304379770 -0700

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>