diff options
| author |   Dean Luick <dean.luick@intel.com> | 2016-04-14 08:31:30 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2016-04-28 16:32:29 -0400 |
| commit | f9b5635cbe7bcacb94870e44387df133dd851b10 (patch) | |
| tree | 695e779b051a26841022a037dbe2b1251ead33be /drivers/staging/rdma | |
| parent | IB/hfi1: Add RSM rule for user FECN handling (diff) | |
| download | linux-dev-f9b5635cbe7bcacb94870e44387df133dd851b10.tar.xz linux-dev-f9b5635cbe7bcacb94870e44387df133dd851b10.zip | |
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>
Diffstat (limited to 'drivers/staging/rdma')
| -rw-r--r-- | 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 386309c67efd..f50f1b132af9 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 */ |