[PATCH] pinctrl: rtd: Fix error handling for devm_platform_ioremap_resource()

[Felix Gu]

devm_platform_ioremap_resource() returns ERR_PTR() on failure,
not NULL. The incorrect NULL check would fail to detect actual
errors from the ioremap operation.

Fix by using IS_ERR() and PTR_ERR() as documented for this API.

Fixes: b7f698b22b8b ("pinctrl: realtek: Switch to use devm functions")
Signed-off-by: Felix Gu <ustc.gu@xxxxxxxxx>
---
 drivers/pinctrl/realtek/pinctrl-rtd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/realtek/pinctrl-rtd.c b/drivers/pinctrl/realtek/pinctrl-rtd.c
index 60dfb39bc986..429c94b79c49 100644
--- a/drivers/pinctrl/realtek/pinctrl-rtd.c
+++ b/drivers/pinctrl/realtek/pinctrl-rtd.c
@@ -574,8 +574,8 @@ int rtd_pinctrl_probe(struct platform_device *pdev, const struct rtd_pinctrl_des
 		return -ENOMEM;
 
 	data->base = devm_platform_ioremap_resource(pdev, 0);
-	if (!data->base)
-		return -ENOMEM;
+	if (IS_ERR(data->base))
+		return PTR_ERR(data->base);
 
 	data->dev = &pdev->dev;
 	data->info = desc;

---
base-commit: b5d083a3ed1e2798396d5e491432e887da8d4a06
change-id: 20260321-rtd-ef9bf9f9cea7

Best regards,
-- 
Felix Gu <ustc.gu@xxxxxxxxx>