[PATCH 5.17 080/343] drm/sprd: fix potential NULL dereference

[Greg Kroah-Hartman]

From: Kevin Tang <kevin3.tang@xxxxxxxxx>

[ Upstream commit 8668658aebb0a19d877d5a81c004baf716c4aaa6 ]

'drm' could be null in sprd_drm_shutdown, and drm_warn maybe dereference
it, remove this warning log.

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Kevin Tang <kevin3.tang@xxxxxxxxx>
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Link: https://lore.kernel.org/all/20220117084044.9210-1-kevin3.tang@xxxxxxxxx

v1 -> v2:
- Split checking platform_get_resource() return value to a separate patch
- Use dev_warn() instead of removing the warning log

Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/sprd/sprd_drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
index a077e2d4d721..af2be97d5ed0 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.c
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -155,7 +155,7 @@ static void sprd_drm_shutdown(struct platform_device *pdev)
 	struct drm_device *drm = platform_get_drvdata(pdev);
 
 	if (!drm) {
-		drm_warn(drm, "drm device is not available, no shutdown\n");
+		dev_warn(&pdev->dev, "drm device is not available, no shutdown\n");
 		return;
 	}
 
-- 
2.35.1