net: dsa: switch to devm_ calls and remove kfree calls

index 6155923..d5a162c 100644
@@ -306,7 +306,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 	if (ret < 0)
 		goto out;
 
-	ds->slave_mii_bus = mdiobus_alloc();
+	ds->slave_mii_bus = devm_mdiobus_alloc(parent);
 	if (ds->slave_mii_bus == NULL) {
 		ret = -ENOMEM;
 		goto out;

@@ -315,7 +315,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 
 	ret = mdiobus_register(ds->slave_mii_bus);
 	if (ret < 0)
-		goto out_free;
+		goto out;
 
 
 	/*

@@ -368,10 +368,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 
 	return ret;
 
-out_free:
-	mdiobus_free(ds->slave_mii_bus);
 out:
-	kfree(ds);
 	return ret;
 }
 

@@ -401,7 +398,7 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 	/*
 	 * Allocate and initialise switch state.
 	 */
-	ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
+	ds = devm_kzalloc(parent, sizeof(*ds) + drv->priv_size, GFP_KERNEL);
 	if (ds == NULL)
 		return ERR_PTR(-ENOMEM);
 

@@ -462,7 +459,6 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
 	}
 
 	mdiobus_unregister(ds->slave_mii_bus);
-	mdiobus_free(ds->slave_mii_bus);
 }
 
 #ifdef CONFIG_PM_SLEEP

@@ -922,7 +918,7 @@ static int dsa_probe(struct platform_device *pdev)
 		goto out;
 	}
 
-	dst = kzalloc(sizeof(*dst), GFP_KERNEL);
+	dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
 	if (dst == NULL) {
 		dev_put(dev);
 		ret = -ENOMEM;

@@ -953,10 +949,8 @@ static void dsa_remove_dst(struct dsa_switch_tree *dst)
 	for (i = 0; i < dst->pd->nr_chips; i++) {
 		struct dsa_switch *ds = dst->ds[i];
 
-		if (ds) {
+		if (ds)
 			dsa_switch_destroy(ds);
-			kfree(ds);
-		}
 	}
 }
 

@@ -965,7 +959,6 @@ static int dsa_remove(struct platform_device *pdev)
 	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 
 	dsa_remove_dst(dst);
-	kfree(dst);
 	dsa_of_remove(&pdev->dev);
 
 	return 0;