From: Easwar Hariharan <easwar.hariharan@xxxxxxxxx> 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.luick@xxxxxxxxx> Signed-off-by: Easwar Hariharan <easwar.hariharan@xxxxxxxxx> Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx> --- 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 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
