From 06c3bbd3c12737a50c2e981821b5585e1786e73d Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Mon, 17 Dec 2018 17:18:30 +0800
Subject: drm/shmob: Fix return value check in shmob_drm_probe
Git-commit: 06c3bbd3c12737a50c2e981821b5585e1786e73d
Patch-mainline: v5.1-rc1
References: bsc#1113722
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: 8f1597c8f1a5 ("drm: shmobile: Perform initialization/cleanup at probe/remove time")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/shmobile/shmob_drm_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
index 8554102a6ead..f2cfd1698b78 100644
--- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
+++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
@@ -229,8 +229,8 @@ 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)
--
2.20.1