From f9de8151877b4f01cc8e124b0e213a6c6c78d970 Mon Sep 17 00:00:00 2001
From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Date: Fri, 29 Oct 2010 14:37:23 -0700
Subject: [PATCH] xhci: Make roothub functions deal with device removal.

Return early in the roothub control and status functions if the xHCI host
controller is not electrically present in the system (register reads
return all "fs").  This issue only shows up when the xHCI driver registers
two roothubs and the host controller is removed from the system.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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