diff options
| author |   Ong Boon Leong <boon.leong.ong@intel.com> | 2020-02-07 15:33:40 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-02-07 11:36:21 +0100 |
| commit | 907a076881f171254219faad05f46ac5baabedfb (patch) | |
| tree | a573f9477a76e60b6a10c1353f3f600b50fee1d2 /drivers | |
| parent | net: stmmac: fix incorrect GMAC_VLAN_TAG register writting in GMAC4+ (diff) | |
| download | wireguard-linux-907a076881f171254219faad05f46ac5baabedfb.tar.xz wireguard-linux-907a076881f171254219faad05f46ac5baabedfb.zip | |
net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting
We should always do a read of current value of XGMAC_VLAN_TAG instead of
directly overwriting the register value.
Fixes: 3cd1cfcba26e2 ("net: stmmac: Implement VLAN Hash Filtering in XGMAC")
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index 2af3ac5409b7..a0e67d178280 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -569,7 +569,9 @@ static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash, writel(value, ioaddr + XGMAC_PACKET_FILTER); - value = XGMAC_VLAN_VTHM | XGMAC_VLAN_ETV; + value = readl(ioaddr + XGMAC_VLAN_TAG); + + value |= XGMAC_VLAN_VTHM | XGMAC_VLAN_ETV; if (is_double) { value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; @@ -584,7 +586,9 @@ static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash, writel(value, ioaddr + XGMAC_PACKET_FILTER); - value = XGMAC_VLAN_ETV; + value = readl(ioaddr + XGMAC_VLAN_TAG); + + value |= XGMAC_VLAN_ETV; if (is_double) { value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; |