tree d631f0991e8be72d1d4d1cd2e1ce8d32eb5116e5
parent 895cf5f3d6cb72825919a39ae48a41476a821e65
author Steve Wise <swise@opengridcomputing.com> 1274392663 -0500
committer Roland Dreier <rolandd@cisco.com> 1274760481 -0700

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>