From: Steve Wise <swise@opengridcomputing.com>
Date: Thu, 20 May 2010 21:57:43 +0000 (-0500)
Subject: RDMA/cxgb4: Optimize CQ overflow detection
X-Git-Tag: v2.6.35-rc1~265^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84172dee05cbce6ae791eac481ef4d8590cda791;p=pandora-kernel.git

RDMA/cxgb4: Optimize CQ overflow detection

1) save the timestamp flit in the cq when we consume a CQE.

2) always compare the saved flit with the previous entry flit when
   reading the next CQE entry.  If the flits don't compare, then we
   have overflowed.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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