Imported Upstream version 17.05.2

[deb_dpdk.git] / drivers / net / sfc / sfc_port.c

diff --git a/drivers/net/sfc/sfc_port.c b/drivers/net/sfc/sfc_port.c
index ee96bcd..87affc9 100644 (file)
--- a/drivers/net/sfc/sfc_port.c
+++ b/drivers/net/sfc/sfc_port.c
@@ -242,6 +242,18 @@ sfc_port_start(struct sfc_adapter *sa)
                }
        }
 
+       if ((port->mac_stats_update_period_ms != 0) &&
+           port->mac_stats_periodic_dma_supported) {
+               /*
+                * Request an explicit MAC stats upload immediately to
+                * preclude bogus figures readback if the user decides
+                * to read stats before periodic DMA is really started
+                */
+               rc = efx_mac_stats_upload(sa->nic, &port->mac_stats_dma_mem);
+               if (rc != 0)
+                       goto fail_mac_stats_upload;
+       }
+
        sfc_log_init(sa, "disable MAC drain");
        rc = efx_mac_drain(sa->nic, B_FALSE);
        if (rc != 0)
@@ -262,6 +274,7 @@ fail_mac_drain:
        (void)efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
                                     0, B_FALSE);
 
+fail_mac_stats_upload:
 fail_mac_stats_periodic:
 fail_mcast_address_list_set:
 fail_mac_filter_set: