net: dsa: qca8k: handle error from qca8k_busy_wait

Propagate errors from qca8k_busy_wait instead of hardcoding return
value.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/qca8k.c

@@ -388,8 +388,9 @@ qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
 		return ret;
 
 	/* wait for completion */
-	if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY))
-		return -1;
+	ret = qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY);
+	if (ret)
+		return ret;
 
 	/* Check for table full violation when adding an entry */
 	if (cmd == QCA8K_FDB_LOAD) {
@@ -468,8 +469,9 @@ qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid)
 		return ret;
 
 	/* wait for completion */
-	if (qca8k_busy_wait(priv, QCA8K_REG_VTU_FUNC1, QCA8K_VTU_FUNC1_BUSY))
-		return -ETIMEDOUT;
+	ret = qca8k_busy_wait(priv, QCA8K_REG_VTU_FUNC1, QCA8K_VTU_FUNC1_BUSY);
+	if (ret)
+		return ret;
 
 	/* Check for table full violation when adding an entry */
 	if (cmd == QCA8K_VLAN_LOAD) {
@@ -580,7 +582,9 @@ qca8k_mib_init(struct qca8k_priv *priv)
 	if (ret)
 		goto exit;
 
-	qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
+	ret = qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
+	if (ret)
+		goto exit;
 
 	ret = qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
 	if (ret)
@@ -670,9 +674,10 @@ qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum)
 	if (ret)
 		return ret;
 
-	if (qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
-			    QCA8K_MDIO_MASTER_BUSY))
-		return -ETIMEDOUT;
+	ret = qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
+			      QCA8K_MDIO_MASTER_BUSY);
+	if (ret)
+		return ret;
 
 	val = qca8k_read(priv, QCA8K_MDIO_MASTER_CTRL);
 	if (val < 0)