From: Dean Luick <dean.luick@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Dean Luick <dean.luick@xxxxxxxxx>
---
drivers/staging/rdma/hfi1/chip.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c
index 386309c..f50f1b1 100644
--- a/drivers/staging/rdma/hfi1/chip.c
+++ b/drivers/staging/rdma/hfi1/chip.c
@@ -7336,7 +7336,11 @@ retry:
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 */
--
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