[PATCH 1/1] ixgbe: write flush vfta registers

[zyjzyj2000]

From: Zhu Yanjun <zyjzyj2...@gmail.com>

Sometimes vfta registers can not be written successfully in dcb mode.
This is very occassional. When the ixgbe nic runs for a very long time,
sometimes this bug occurs. But after IXGBE_WRITE_FLUSH is executed,
this bug never occurs.

Signed-off-by: Zhu Yanjun <zyjzyj2...@gmail.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index bd93d82..1221cfb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -4138,8 +4138,10 @@ static void ixgbe_vlan_promisc_enable(struct 
ixgbe_adapter *adapter)
        }
 
        /* Set all bits in the VLAN filter table array */
-       for (i = hw->mac.vft_size; i--;)
+       for (i = hw->mac.vft_size; i--;) {
                IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
+               IXGBE_WRITE_FLUSH(hw);
+       }
 }
 
 #define VFTA_BLOCK_SIZE 8
@@ -4186,6 +4188,7 @@ static void ixgbe_scrub_vfta(struct ixgbe_adapter 
*adapter, u32 vfta_offset)
                vfta[i] |= adapter->active_vlans[word] >> bits;
 
                IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
+               IXGBE_WRITE_FLUSH(hw);
        }
 }
 
-- 
2.7.4