Messages in this thread Patch in this message | | | From | Ong Boon Leong <> | Subject | [PATCH net v3 2/5] net: stmmac: fix incorrect GMAC_VLAN_TAG register writting in GMAC4+ | Date | Wed, 22 Jan 2020 17:09:33 +0800 |
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From: "Tan, Tee Min" <tee.min.tan@intel.com>
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> --- drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 7 ++++--- 1 file 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 40ca00e596dd..6e3d0ab0ecd6 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; -- 2.17.1
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