[PATCH -next] net: pcs-rzn1-miic: fix return value check in miic_probe()

[Yang Yingliang]

If devm_platform_ioremap_resource() fails, it never return
NULL pointer, replace NULL test with IS_ERR().

Fixes: 7dc54d3b8d91 ("net: pcs: add Renesas MII converter driver")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 drivers/net/pcs/pcs-rzn1-miic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
index 8f5e910f443d..d896961e48cc 100644
--- a/drivers/net/pcs/pcs-rzn1-miic.c
+++ b/drivers/net/pcs/pcs-rzn1-miic.c
@@ -461,8 +461,8 @@ static int miic_probe(struct platform_device *pdev)
 	spin_lock_init(&miic->lock);
 	miic->dev = dev;
 	miic->base = devm_platform_ioremap_resource(pdev, 0);
-	if (!miic->base)
-		return -EINVAL;
+	if (IS_ERR(miic->base))
+		return PTR_ERR(miic->base);
 
 	ret = devm_pm_runtime_enable(dev);
 	if (ret < 0)
-- 
2.25.1