--- /dev/null
+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);
+ }
+
--- /dev/null
+From 7c9896e37807862e276064dd9331860f5d27affc Mon Sep 17 00:00:00 2001
+From: Yang Yingliang <yangyingliang@huawei.com>
+Date: Sat, 29 May 2021 11:04:38 +0800
+Subject: [PATCH] net: dsa: qca8k: check return value of read functions
+ correctly
+
+Current return type of qca8k_mii_read32() and qca8k_read() are
+unsigned, it can't be negative, so the return value check is
+unuseful. For check the return value correctly, change return
+type of the read functions and add a output parameter to store
+the read value.
+
+Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/dsa/qca8k.c | 130 +++++++++++++++++++---------------------
+ 1 file changed, 60 insertions(+), 70 deletions(-)
+
+--- a/drivers/net/dsa/qca8k.c
++++ b/drivers/net/dsa/qca8k.c
+@@ -89,26 +89,26 @@ qca8k_split_addr(u32 regaddr, u16 *r1, u
+ *page = regaddr & 0x3ff;
+ }
+
+-static u32
+-qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum)
++static int
++qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum, u32 *val)
+ {
+- u32 val;
+ int ret;
+
+ ret = bus->read(bus, phy_id, regnum);
+ if (ret >= 0) {
+- val = ret;
++ *val = ret;
+ ret = bus->read(bus, phy_id, regnum + 1);
+- val |= ret << 16;
++ *val |= ret << 16;
+ }
+
+ if (ret < 0) {
+ dev_err_ratelimited(&bus->dev,
+ "failed to read qca8k 32bit register\n");
++ *val = 0;
+ return ret;
+ }
+
+- return val;
++ return 0;
+ }
+
+ static void
+@@ -148,26 +148,26 @@ qca8k_set_page(struct mii_bus *bus, u16
+ return 0;
+ }
+
+-static u32
+-qca8k_read(struct qca8k_priv *priv, u32 reg)
++static int
++qca8k_read(struct qca8k_priv *priv, u32 reg, u32 *val)
+ {
+ struct mii_bus *bus = priv->bus;
+ u16 r1, r2, page;
+- u32 val;
++ int ret;
+
+ qca8k_split_addr(reg, &r1, &r2, &page);
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+
+- val = qca8k_set_page(bus, page);
+- if (val < 0)
++ ret = qca8k_set_page(bus, page);
++ if (ret < 0)
+ goto exit;
+
+- val = qca8k_mii_read32(bus, 0x10 | r2, r1);
++ ret = qca8k_mii_read32(bus, 0x10 | r2, r1, val);
+
+ exit:
+ mutex_unlock(&bus->mdio_lock);
+- return val;
++ return ret;
+ }
+
+ static int
+@@ -208,11 +208,9 @@ qca8k_rmw(struct qca8k_priv *priv, u32 r
+ if (ret < 0)
+ goto exit;
+
+- val = qca8k_mii_read32(bus, 0x10 | r2, r1);
+- if (val < 0) {
+- ret = val;
++ ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val);
++ if (ret < 0)
+ goto exit;
+- }
+
+ val &= ~mask;
+ val |= write_val;
+@@ -240,15 +238,8 @@ static int
+ qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
+ {
+ struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
+- int ret;
+-
+- ret = qca8k_read(priv, reg);
+- if (ret < 0)
+- return ret;
+-
+- *val = ret;
+
+- return 0;
++ return qca8k_read(priv, reg, val);
+ }
+
+ static int
+@@ -296,18 +287,18 @@ static struct regmap_config qca8k_regmap
+ static int
+ qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
+ {
++ int ret, ret1;
+ u32 val;
+- int ret;
+
+- ret = read_poll_timeout(qca8k_read, val, !(val & mask),
++ ret = read_poll_timeout(qca8k_read, ret1, !(val & mask),
+ 0, QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
+- priv, reg);
++ priv, reg, &val);
+
+ /* Check if qca8k_read has failed for a different reason
+ * before returning -ETIMEDOUT
+ */
+- if (ret < 0 && val < 0)
+- return val;
++ if (ret < 0 && ret1 < 0)
++ return ret1;
+
+ return ret;
+ }
+@@ -316,13 +307,13 @@ static int
+ qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
+ {
+ u32 reg[4], val;
+- int i;
++ int i, ret;
+
+ /* load the ARL table into an array */
+ for (i = 0; i < 4; i++) {
+- val = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4));
+- if (val < 0)
+- return val;
++ ret = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4), &val);
++ if (ret < 0)
++ return ret;
+
+ reg[i] = val;
+ }
+@@ -396,9 +387,9 @@ qca8k_fdb_access(struct qca8k_priv *priv
+
+ /* Check for table full violation when adding an entry */
+ if (cmd == QCA8K_FDB_LOAD) {
+- reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC);
+- if (reg < 0)
+- return reg;
++ ret = qca8k_read(priv, QCA8K_REG_ATU_FUNC, ®);
++ if (ret < 0)
++ return ret;
+ if (reg & QCA8K_ATU_FUNC_FULL)
+ return -1;
+ }
+@@ -477,9 +468,9 @@ qca8k_vlan_access(struct qca8k_priv *pri
+
+ /* Check for table full violation when adding an entry */
+ if (cmd == QCA8K_VLAN_LOAD) {
+- reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC1);
+- if (reg < 0)
+- return reg;
++ ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC1, ®);
++ if (ret < 0)
++ return ret;
+ if (reg & QCA8K_VTU_FUNC1_FULL)
+ return -ENOMEM;
+ }
+@@ -505,11 +496,9 @@ qca8k_vlan_add(struct qca8k_priv *priv,
+ if (ret < 0)
+ goto out;
+
+- reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
+- if (reg < 0) {
+- ret = reg;
++ ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC0, ®);
++ if (ret < 0)
+ 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)
+@@ -542,11 +531,9 @@ qca8k_vlan_del(struct qca8k_priv *priv,
+ if (ret < 0)
+ goto out;
+
+- reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
+- if (reg < 0) {
+- ret = reg;
++ ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC0, ®);
++ if (ret < 0)
+ 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);
+@@ -638,19 +625,19 @@ qca8k_mdio_busy_wait(struct mii_bus *bus
+ {
+ u16 r1, r2, page;
+ u32 val;
+- int ret;
++ int ret, ret1;
+
+ qca8k_split_addr(reg, &r1, &r2, &page);
+
+- ret = read_poll_timeout(qca8k_mii_read32, val, !(val & mask), 0,
++ ret = read_poll_timeout(qca8k_mii_read32, ret1, !(val & mask), 0,
+ QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
+- bus, 0x10 | r2, r1);
++ bus, 0x10 | r2, r1, &val);
+
+ /* Check if qca8k_read has failed for a different reason
+ * before returnting -ETIMEDOUT
+ */
+- if (ret < 0 && val < 0)
+- return val;
++ if (ret < 0 && ret1 < 0)
++ return ret1;
+
+ return ret;
+ }
+@@ -725,7 +712,7 @@ qca8k_mdio_read(struct mii_bus *salve_bu
+ if (ret)
+ goto exit;
+
+- val = qca8k_mii_read32(bus, 0x10 | r2, r1);
++ ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val);
+
+ exit:
+ /* even if the busy_wait timeouts try to clear the MASTER_EN */
+@@ -733,10 +720,10 @@ exit:
+
+ mutex_unlock(&bus->mdio_lock);
+
+- if (val >= 0)
+- val &= QCA8K_MDIO_MASTER_DATA_MASK;
++ if (ret >= 0)
++ ret = val & QCA8K_MDIO_MASTER_DATA_MASK;
+
+- return val;
++ return ret;
+ }
+
+ static int
+@@ -1211,7 +1198,7 @@ qca8k_phylink_mac_config(struct dsa_swit
+ qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
+
+ /* Enable/disable SerDes auto-negotiation as necessary */
+- val = qca8k_read(priv, QCA8K_REG_PWS);
++ qca8k_read(priv, QCA8K_REG_PWS, &val);
+ if (phylink_autoneg_inband(mode))
+ val &= ~QCA8K_PWS_SERDES_AEN_DIS;
+ else
+@@ -1219,7 +1206,7 @@ qca8k_phylink_mac_config(struct dsa_swit
+ qca8k_write(priv, QCA8K_REG_PWS, val);
+
+ /* Configure the SGMII parameters */
+- val = qca8k_read(priv, QCA8K_REG_SGMII_CTRL);
++ qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val);
+
+ val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX |
+ QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;
+@@ -1314,10 +1301,11 @@ qca8k_phylink_mac_link_state(struct dsa_
+ {
+ struct qca8k_priv *priv = ds->priv;
+ u32 reg;
++ int ret;
+
+- reg = qca8k_read(priv, QCA8K_REG_PORT_STATUS(port));
+- if (reg < 0)
+- return reg;
++ ret = qca8k_read(priv, QCA8K_REG_PORT_STATUS(port), ®);
++ if (ret < 0)
++ return ret;
+
+ state->link = !!(reg & QCA8K_PORT_STATUS_LINK_UP);
+ state->an_complete = state->link;
+@@ -1419,19 +1407,20 @@ qca8k_get_ethtool_stats(struct dsa_switc
+ struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
+ const struct qca8k_mib_desc *mib;
+ u32 reg, i, val;
+- u64 hi;
++ u64 hi = 0;
++ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
+ mib = &ar8327_mib[i];
+ reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
+
+- val = qca8k_read(priv, reg);
+- if (val < 0)
++ ret = qca8k_read(priv, reg, &val);
++ if (ret < 0)
+ continue;
+
+ if (mib->size == 2) {
+- hi = qca8k_read(priv, reg + 4);
+- if (hi < 0)
++ ret = qca8k_read(priv, reg + 4, (u32 *)&hi);
++ if (ret < 0)
+ continue;
+ }
+
+@@ -1459,7 +1448,7 @@ qca8k_set_mac_eee(struct dsa_switch *ds,
+ int ret;
+
+ mutex_lock(&priv->reg_mutex);
+- reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL);
++ ret = qca8k_read(priv, QCA8K_REG_EEE_CTRL, ®);
+ if (reg < 0) {
+ ret = reg;
+ goto exit;
+@@ -1802,14 +1791,15 @@ static int qca8k_read_switch_id(struct q
+ const struct qca8k_match_data *data;
+ u32 val;
+ u8 id;
++ int ret;
+
+ /* get the switches ID from the compatible */
+ data = of_device_get_match_data(priv->dev);
+ if (!data)
+ return -ENODEV;
+
+- val = qca8k_read(priv, QCA8K_REG_MASK_CTRL);
+- if (val < 0)
++ ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &val);
++ if (ret < 0)
+ return -ENODEV;
+
+ id = QCA8K_MASK_CTRL_DEVICE_ID(val & QCA8K_MASK_CTRL_DEVICE_ID_MASK);
projects / openwrt / openwrt.git / commitdiff