Commit f9b5635c authored Apr 14, 2016 by Dean Luick Committed by Doug Ledford Apr 28, 2016

IB/hfi1: Ignore link downgrade with 0 lanes



Versions of the 8051 firmware < 0.38 may report a link failure
as a link downgrade with a width of 0 followed by a link down
notification.  Ignore the zero width downgrade notification -
the driver should follow the link down path.

Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

parent 8f000f7f

drivers/staging/rdma/hfi1/chip.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -7336,7 +7336,11 @@ void apply_link_downgrade_policy(struct hfi1_pportdata *ppd, int refresh_widths)
		ppd->link_width_downgrade_rx_active = rx;
		}

		if (lwde == 0) {
		if (ppd->link_width_downgrade_tx_active == 0 \|\|
		ppd->link_width_downgrade_rx_active == 0) {
		/* the 8051 reported a dead link as a downgrade */
		dd_dev_err(ppd->dd, "Link downgrade is really a link down, ignoring\n");
		} else if (lwde == 0) {
		/* downgrade is disabled */

		/* bounce if not at starting active width */