thermal: rcar_gen3_thermal: check that TSC exists before memory allocation

Move the check for a TSC resource before allocating memory for a new
TSC. If no TSC is found there is little point in allocating memory for
it.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/rcar_gen3_thermal.c

@@ -276,16 +276,16 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
 	for (i = 0; i < TSC_MAX_NUM; i++) {
 		struct rcar_gen3_thermal_tsc *tsc;
 
+		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+		if (!res)
+			break;
+
 		tsc = devm_kzalloc(dev, sizeof(*tsc), GFP_KERNEL);
 		if (!tsc) {
 			ret = -ENOMEM;
 			goto error_unregister;
 		}
 
-		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-		if (!res)
-			break;
-
 		tsc->base = devm_ioremap_resource(dev, res);
 		if (IS_ERR(tsc->base)) {
 			ret = PTR_ERR(tsc->base);