From: Ong Boon Leong <boon.leong.ong@intel.com>
To: netdev@vger.kernel.org
Cc: Tan Tee Min <tee.min.tan@intel.com>,
Voon Weifeng <weifeng.voon@intel.com>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Alexandre TORGUE <alexandre.torgue@st.com>,
Jose Abreu <Jose.Abreu@synopsys.com>,
"David S . Miller" <davem@davemloft.net>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandru Ardelean <alexandru.ardelean@analog.com>,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net v5 2/5] net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting
Date: Fri, 7 Feb 2020 15:33:40 +0800 [thread overview]
Message-ID: <20200207073340.9409-1-boon.leong.ong@intel.com> (raw)
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>
---
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 8 ++++++--
1 file 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;
--
2.17.1
reply other threads:[~2020-02-07 7:34 UTC|newest]
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