diff options
| author |   Tan, Tee Min <tee.min.tan@intel.com> | 2020-02-07 15:33:20 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-02-07 11:36:21 +0100 |
| commit | 9eeeb3c9de4e3aeaa2bec097162f09305dd9f4c3 (patch) | |
| tree | e83995778d0d9acf5f02c6b6a0c251c04b94af34 /drivers | |
| parent | hv_netvsc: Fix XDP refcnt for synthetic and VF NICs (diff) | |
| download | wireguard-linux-9eeeb3c9de4e3aeaa2bec097162f09305dd9f4c3.tar.xz wireguard-linux-9eeeb3c9de4e3aeaa2bec097162f09305dd9f4c3.zip | |
net: stmmac: fix incorrect GMAC_VLAN_TAG register writting in GMAC4+
It should always do a read of current value of GMAC_VLAN_TAG instead of
directly overwriting the register value.
Fixes: c1be0022df0d ("net: stmmac: Add VLAN HASH filtering support in GMAC4+")
Signed-off-by: Tan, Tee Min <tee.min.tan@intel.com>
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/dwmac4_core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index f0c0ea616032..4d8eef9ff137 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -736,11 +736,14 @@ static void dwmac4_update_vlan_hash(struct mac_device_info *hw, u32 hash, __le16 perfect_match, bool is_double) { void __iomem *ioaddr = hw->pcsr; + u32 value; writel(hash, ioaddr + GMAC_VLAN_HASH_TABLE); + value = readl(ioaddr + GMAC_VLAN_TAG); + if (hash) { - u32 value = GMAC_VLAN_VTHM | GMAC_VLAN_ETV; + value |= GMAC_VLAN_VTHM | GMAC_VLAN_ETV; if (is_double) { value |= GMAC_VLAN_EDVLP; value |= GMAC_VLAN_ESVL; @@ -759,8 +762,6 @@ static void dwmac4_update_vlan_hash(struct mac_device_info *hw, u32 hash, writel(value | perfect_match, ioaddr + GMAC_VLAN_TAG); } else { - u32 value = readl(ioaddr + GMAC_VLAN_TAG); - value &= ~(GMAC_VLAN_VTHM | GMAC_VLAN_ETV); value &= ~(GMAC_VLAN_EDVLP | GMAC_VLAN_ESVL); value &= ~GMAC_VLAN_DOVLTC; |