[PATCH] drm: shmobile: checking for NULL instead if IS_ERR()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

We changed from ioremap_nocache() to devm_ioremap_resource() so the
check needs to be changed from checking for NULL to checking for error
pointers.

Fixes: 16ad3b2ce8dd ("drm/shmobile: Use devm_* managed functions")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
index 800d1d2c435d..6bd777a3dc17 100644
--- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
+++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
@@ -235,8 +235,8 @@ static int shmob_drm_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	sdev->mmio = devm_ioremap_resource(&pdev->dev, res);
-	if (sdev->mmio == NULL)
-		return -ENOMEM;
+	if (IS_ERR(sdev->mmio))
+		return PTR_ERR(sdev->mmio);
 
 	ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
 	if (ret < 0)