pmdomain: ti-sci: Use scope based of_node_put() to simplify code.

Use scope based of_node_put() to simplify the code logic, and we don't
need to call of_node_put(). Besides, put of_parse_phandle_with_args() in
the while loop to make code more simple.

Signed-off-by: Zhang Zekun <[e-mail]>
Reviewed-by: Dhruva Gole <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/pmdomain/ti/ti_sci_pm_domains.c

···
 	struct device *dev = &pdev->dev;
 	struct ti_sci_genpd_provider *pd_provider;
 	struct ti_sci_pm_domain *pd;
-	struct device_node *np;
+	struct device_node *np __free(device_node) = NULL;
 	struct of_phandle_args args;
-	int ret;
 	u32 max_id = 0;
 	int index;
 
···
 	for_each_node_with_property(np, "power-domains") {
 		index = 0;
 
-		while (1) {
-			ret = of_parse_phandle_with_args(np, "power-domains",
-							 "#power-domain-cells",
-							 index, &args);
-			if (ret)
-				break;
+		while (!of_parse_phandle_with_args(np, "power-domains",
+						   "#power-domain-cells",
+						   index, &args)) {
 
 			if (args.args_count >= 1 && args.np == dev->of_node) {
 				of_node_put(args.np);
···
 				}
 
 				pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
-				if (!pd) {
-					of_node_put(np);
+				if (!pd)
 					return -ENOMEM;
-				}
 
 				pd->pd.name = devm_kasprintf(dev, GFP_KERNEL,
 							     "pd:%d",
 							     args.args[0]);
-				if (!pd->pd.name) {
-					of_node_put(np);
+				if (!pd->pd.name)
 					return -ENOMEM;
-				}
 
 				pd->pd.power_off = ti_sci_pd_power_off;
 				pd->pd.power_on = ti_sci_pd_power_on;