From: Andiry Xu <andiry.xu@amd.com>
Date: Mon, 5 Mar 2012 09:49:40 +0000 (+0800)
Subject: xHCI: check enqueue pointer advance into dequeue seg
X-Git-Tag: v3.4-rc1~184^2~21^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=085deb16845ee0b25385274b39c70cc07e6e4140;p=pandora-kernel.git

xHCI: check enqueue pointer advance into dequeue seg

When a urb is submitted to xHCI driver, check if queueing the urb will make
the enqueue pointer advance into dequeue seg and expand the ring if it
occurs. This is to guarantee the safety of ring expansion.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
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