ixgbe: fix X540 ethtool loopback test.
On X540 we need to set the MACC.FLU bit to 1 in order to force the link
up before entering MAC loopback. This is only used in the ethtool loopback
test, which was failing. This patch corrects it.
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Evan Swanson <evan.swanson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 6cf1c71..bd7524e 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -1595,6 +1595,13 @@
struct ixgbe_hw *hw = &adapter->hw;
u32 reg_data;
+ /* X540 needs to set the MACC.FLU bit to force link up */
+ if (adapter->hw.mac.type == ixgbe_mac_X540) {
+ reg_data = IXGBE_READ_REG(&adapter->hw, IXGBE_MACC);
+ reg_data |= IXGBE_MACC_FLU;
+ IXGBE_WRITE_REG(&adapter->hw, IXGBE_MACC, reg_data);
+ }
+
/* right now we only support MAC loopback in the driver */
reg_data = IXGBE_READ_REG(&adapter->hw, IXGBE_HLREG0);
/* Setup MAC loopback */