power: reset: at91-reset: check properly the return value of devm_of_iomap

devm_of_iomap() returns error code or valid pointer. Check its return
value with IS_ERR().

Fixes: bd3127733f2c ("power: reset: at91-reset: use devm_of_iomap")
Reported-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
index 0266494..64def79 100644 (file)
--- a/drivers/power/reset/at91-reset.c
+++ b/drivers/power/reset/at91-reset.c
@@ -193,7 +193,7 @@ static int __init at91_reset_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        reset->rstc_base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
-       if (!reset->rstc_base) {
+       if (IS_ERR(reset->rstc_base)) {
                dev_err(&pdev->dev, "Could not map reset controller address\n");
                return -ENODEV;
        }
@@ -203,7 +203,7 @@ static int __init at91_reset_probe(struct platform_device *pdev)
                for_each_matching_node_and_match(np, at91_ramc_of_match, &match) {
                        reset->ramc_lpr = (u32)match->data;
                        reset->ramc_base[idx] = devm_of_iomap(&pdev->dev, np, 0, NULL);
-                       if (!reset->ramc_base[idx]) {
+                       if (IS_ERR(reset->ramc_base[idx])) {
                                dev_err(&pdev->dev, "Could not map ram controller address\n");
                                of_node_put(np);
                                return -ENODEV;