drm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results

devm_ioremap_resource() returns an error pointer, not NULL. Thus,
the result should be checked with IS_ERR().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index eb73e3b..4ac4381 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1426,9 +1426,9 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        dsi->reg_base = devm_ioremap_resource(&pdev->dev, res);
-       if (!dsi->reg_base) {
+       if (IS_ERR(dsi->reg_base)) {
                dev_err(&pdev->dev, "failed to remap io region\n");
-               return -EADDRNOTAVAIL;
+               return PTR_ERR(dsi->reg_base);
        }
 
        dsi->phy = devm_phy_get(&pdev->dev, "dsim");