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Commit 74b30b3a authored by Chris Mi's avatar Chris Mi Committed by Leon Romanovsky
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RDMA/mlx5: Set local port to one when accessing counters



When accessing Ports Performance Counters Register (PPCNT),
local port must be one if it is Function-Per-Port HCA that
HCA_CAP.num_ports is 1.

The offending patch can change the local port to other values
when accessing PPCNT after enabling switchdev mode. The following
syndrome will be printed:

 # cat /sys/class/infiniband/rdmap4s0f0/ports/2/counters/*
 # dmesg
 mlx5_core 0000:04:00.0: mlx5_cmd_check:756:(pid 12450): ACCESS_REG(0x805) op_mod(0x1) failed, status bad parameter(0x3), syndrome (0x1e5585)

Fix it by setting local port to one for Function-Per-Port HCA.

Fixes: 210b1f78 ("IB/mlx5: When not in dual port RoCE mode, use provided port as native")
Reviewed-by: default avatarMark Bloch <mbloch@nvidia.com>
Signed-off-by: default avatarChris Mi <cmi@nvidia.com>
Link: https://lore.kernel.org/r/6c5086c295c76211169e58dbd610fb0402360bab.1661763459.git.leonro@nvidia.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 9ca05b0f
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