IB/hfi1: Acquire QSFP cable information on loopback

Currently, QSFP information is not queried
in cases where loopback was set up and QSFP module is
present.

Acquire QSFP information in case of loopback.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/platform.c b/drivers/infiniband/hw/hfi1/platform.c
index 8004f1d..a8af96d 100644 (file)
--- a/drivers/infiniband/hw/hfi1/platform.c
+++ b/drivers/infiniband/hw/hfi1/platform.c
@@ -944,6 +944,21 @@ void tune_serdes(struct hfi1_pportdata *ppd)
        if (loopback != LOOPBACK_NONE ||
            ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
                ppd->driver_link_ready = 1;
+
+               if (qsfp_mod_present(ppd)) {
+                       ret = acquire_chip_resource(ppd->dd,
+                                                   qsfp_resource(ppd->dd),
+                                                   QSFP_WAIT);
+                       if (ret) {
+                               dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n",
+                                          __func__, (int)ppd->dd->hfi1_id);
+                               goto bail;
+                       }
+
+                       refresh_qsfp_cache(ppd, &ppd->qsfp_info);
+                       release_chip_resource(ppd->dd, qsfp_resource(ppd->dd));
+               }
+
                return;
        }