From: Andiry Xu <andiry.xu@amd.com>
Date: Mon, 20 Dec 2010 07:09:34 +0000 (+0800)
Subject: xHCI: fix cycle bit set in giveback_first_trb()
X-Git-Tag: v2.6.38-rc3~7^2^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50f7b52a83a893929edf87a89ebc081ff26a7b91;p=pandora-kernel.git

xHCI: fix cycle bit set in giveback_first_trb()

giveback_first_trb() controls the cycle bit set of the start_trb, to ensure
that the start_trb is written last and the host controller will receive a
whole td at a time.

However, if the ring is wrapped and cycle bit is toggled to zero, then
giveback_first_trb() will be of no effect. In this case, set the cycle bit of
start_trb to 1 at the beginning and clear it in giveback_first_trb().

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