From: Easwar Hariharan <easwar.hariha...@intel.com>
The DC firmware overwrites the enable_lane_tx register and does not update it
on a host request to go to Poll. This causes an infinite loop through the LNI
state machine if a link width downgrade occurs. This patch re-sets the
enable_lane_tx register to all 4 lanes.
Reviewed-by: Dean Luick <dean.lu...@intel.com>
Signed-off-by: Easwar Hariharan <easwar.hariha...@intel.com>
Signed-off-by: Ira Weiny <ira.we...@intel.com>
---
drivers/staging/rdma/hfi1/chip.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c
index 3c48294abd20..0be37e9430af 100644
--- a/drivers/staging/rdma/hfi1/chip.c
+++ b/drivers/staging/rdma/hfi1/chip.c
@@ -5417,6 +5417,8 @@ static int set_local_link_attributes(struct
hfi1_pportdata *ppd)
if (ppd->link_speed_enabled & OPA_LINK_SPEED_12_5G)
ppd->local_tx_rate |= 1;
}
+
+ enable_lane_tx = 0xF; /* enable all four lanes */
ret = write_tx_settings(dd, enable_lane_tx, tx_polarity_inversion,
rx_polarity_inversion, ppd->local_tx_rate);
if (ret != HCMD_SUCCESS)
--
1.8.2
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