ixgbe: DCB, X540 devices do not respond to pause frames

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / net / ixgbe / ixgbe_dcb_82599.c

diff --git a/drivers/net/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ixgbe/ixgbe_dcb_82599.c
index 865ddd8..d50cf78 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_dcb_82599.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_82599.c
@@ -301,12 +301,17 @@ s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en)
                IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg);
                /*
                 * Enable Receive PFC
-                * We will always honor XOFF frames we receive when
-                * we are in PFC mode.
+                * 82599 will always honor XOFF frames we receive when
+                * we are in PFC mode however X540 only honors enabled
+                * traffic classes.
                 */
                reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
                reg &= ~IXGBE_MFLCN_RFCE;
                reg |= IXGBE_MFLCN_RPFCE | IXGBE_MFLCN_DPF;
+
+               if (hw->mac.type == ixgbe_mac_X540)
+                       reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
+
                IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
 
        } else {