IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs
authorEaswar Hariharan <easwar.hariharan@intel.com>
Wed, 8 Feb 2017 13:26:14 +0000 (05:26 -0800)
committerDoug Ledford <dledford@redhat.com>
Sun, 19 Feb 2017 14:18:34 +0000 (09:18 -0500)
commit39e2afa8d042a53d855137d4c5a689a6f5492b39
treebccf63e704c48cb76a506410d61e420d69f79b34
parenteb04ff09d834c1a531d02ee0b3e4b503253df609
IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs

After extended testing, it was found that the previous PCIe Gen
3 recipe, which used adaptive CTLE with Preset 4, could cause an
NMI/Surprise Link Down in about 1 in 100 to 1 in 1000 power cycles on
some platforms. New EV data combined with extensive empirical data
indicates that the new recipe should use static CTLE with Preset 6 for
all integrated silicon SKUs.

Fixes: c3f8de0b334c ("IB/hfi1: Add static PCIe Gen3 CTLE tuning")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/hfi1/pcie.c