iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IB/hfi1: Ignore link downgrade with 0 lanes

Browse Source 
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>
This commit is contained in:
Dean Luick 2016-04-14 08:31:30 -07:00 committed by Doug Ledford
parent 8f000f7f6e
commit f9b5635cbe
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/staging/rdma/hfi1/chip.c
View File

@ -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 */