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Commit 06f2d879 authored by Easwar Hariharan's avatar Easwar Hariharan Committed by Greg Kroah-Hartman
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IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs




[ Upstream commit 39e2afa8 ]

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: c3f8de0b ("IB/hfi1: Add static PCIe Gen3 CTLE tuning")
Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarEaswar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 939f4f6e
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