ixgbe: Fix ethtool diag test for VT mode operation

Skip MAC loopback test when the adapter is set to a VT mode such as SR-IOV
or VMDq

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 0bd49d3b9f6..a0107b5a28e 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -1867,11 +1867,22 @@ static void ixgbe_diag_test(struct net_device *netdev,
                 if (ixgbe_intr_test(adapter, &data[2]))
                         eth_test->flags |= ETH_TEST_FL_FAILED;
 
+                /* If SRIOV or VMDq is enabled then skip MAC
+                 * loopback diagnostic. */
+                if (adapter->flags & (IXGBE_FLAG_SRIOV_ENABLED |
+                                      IXGBE_FLAG_VMDQ_ENABLED)) {
+                        DPRINTK(HW, INFO, "Skip MAC loopback diagnostic in VT "
+                                "mode\n");
+                        data[3] = 0;
+                        goto skip_loopback;
+                }
+
                 ixgbe_reset(adapter);
                 DPRINTK(HW, INFO, "loopback testing starting\n");
                 if (ixgbe_loopback_test(adapter, &data[3]))
                         eth_test->flags |= ETH_TEST_FL_FAILED;
 
+skip_loopback:
                 ixgbe_reset(adapter);
 
                 clear_bit(__IXGBE_TESTING, &adapter->state);