[PATCH -next] scsi: ufs: ufs-exynos: Fix return value check in exynos_ufs_init()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: 55f4b1f73631 ("scsi: ufs: ufs-exynos: Add UFS host support for Exynos SoCs")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/scsi/ufs/ufs-exynos.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-exynos.c b/drivers/scsi/ufs/ufs-exynos.c
index 440f2af83d9c..c918fbc6ca60 100644
--- a/drivers/scsi/ufs/ufs-exynos.c
+++ b/drivers/scsi/ufs/ufs-exynos.c
@@ -950,25 +950,25 @@ static int exynos_ufs_init(struct ufs_hba *hba)
 	/* exynos-specific hci */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vs_hci");
 	ufs->reg_hci = devm_ioremap_resource(dev, res);
-	if (!ufs->reg_hci) {
+	if (IS_ERR(ufs->reg_hci)) {
 		dev_err(dev, "cannot ioremap for hci vendor register\n");
-		return -ENOMEM;
+		return PTR_ERR(ufs->reg_hci);
 	}
 
 	/* unipro */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "unipro");
 	ufs->reg_unipro = devm_ioremap_resource(dev, res);
-	if (!ufs->reg_unipro) {
+	if (IS_ERR(ufs->reg_unipro)) {
 		dev_err(dev, "cannot ioremap for unipro register\n");
-		return -ENOMEM;
+		return PTR_ERR(ufs->reg_unipro);
 	}
 
 	/* ufs protector */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ufsp");
 	ufs->reg_ufsp = devm_ioremap_resource(dev, res);
-	if (!ufs->reg_ufsp) {
+	if (IS_ERR(ufs->reg_ufsp)) {
 		dev_err(dev, "cannot ioremap for ufs protector register\n");
-		return -ENOMEM;
+		return PTR_ERR(ufs->reg_ufsp);
 	}
 
 	ret = exynos_ufs_parse_dt(dev, ufs);