openwrt/target/linux/generic/backport-5.10/736-v5.14-net-dsa-qca8k-fix-missing-unlock-on-error-in-qca8k-vlan.patch

From 0d56e5c191b197e1d30a0a4c92628836dafced0f Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Tue, 18 May 2021 11:24:13 +0000
Subject: [PATCH] net: dsa: qca8k: fix missing unlock on error in
 qca8k_vlan_(add|del)

Add the missing unlock before return from function qca8k_vlan_add()
and qca8k_vlan_del() in the error handling case.

Fixes: 028f5f8ef44f ("net: dsa: qca8k: handle error with qca8k_read operation")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/qca8k.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -506,8 +506,10 @@ qca8k_vlan_add(struct qca8k_priv *priv,
 		goto out;
 
 	reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
-	if (reg < 0)
-		return reg;
+	if (reg < 0) {
+		ret = reg;
+		goto out;
+	}
 	reg |= QCA8K_VTU_FUNC0_VALID | QCA8K_VTU_FUNC0_IVL_EN;
 	reg &= ~(QCA8K_VTU_FUNC0_EG_MODE_MASK << QCA8K_VTU_FUNC0_EG_MODE_S(port));
 	if (untagged)
@@ -519,7 +521,7 @@ qca8k_vlan_add(struct qca8k_priv *priv,
 
 	ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
 	if (ret)
-		return ret;
+		goto out;
 	ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
 
 out:
@@ -541,8 +543,10 @@ qca8k_vlan_del(struct qca8k_priv *priv,
 		goto out;
 
 	reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
-	if (reg < 0)
-		return reg;
+	if (reg < 0) {
+		ret = reg;
+		goto out;
+	}
 	reg &= ~(3 << QCA8K_VTU_FUNC0_EG_MODE_S(port));
 	reg |= QCA8K_VTU_FUNC0_EG_MODE_NOT <<
 			QCA8K_VTU_FUNC0_EG_MODE_S(port);
@@ -564,7 +568,7 @@ qca8k_vlan_del(struct qca8k_priv *priv,
 	} else {
 		ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
 		if (ret)
-			return ret;
+			goto out;
 		ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
 	}