[PATCH 1/1] ixgbe: write flush vfta registers
From: zyjzyj2000@gmail.com
Date: 2016-11-16 12:58:19
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Zhu Yanjun <zyjzyj2000@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 <zyjzyj2000@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); } }
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2.7.4