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Commit febffe2c authored by Easwar Hariharan's avatar Easwar Hariharan Committed by Greg Kroah-Hartman
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staging/rdma/hfi1: Fix port bounce issues with 0.22 DC firmware 



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: default avatarDean Luick <dean.luick@intel.com>
Signed-off-by: default avatarEaswar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b421922e

drivers/staging/rdma/hfi1/chip.c

+2 −0
Original line number Diff line number Diff line
@@ -5415,6 +5415,8 @@ 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)