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 8004f1da75485ba322a4bf3b66b01980941b4b13..a8af96d2b1b0ae0dc5e98ae08e3b5c9b5faa50e9 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;
        }