Commit 73792e6e authored by Kevin Tang's avatar Kevin Tang Committed by kevin3.tang
Browse files

drm/sprd: check the platform_get_resource() return value 



platform_get_resource() may fail and return NULL, so check it's value
before using it.

Reported-by: default avatarZou Wei <zou_wei@huawei.com>
Signed-off-by: default avatarKevin Tang <kevin3.tang@gmail.com>
Reviewed-by: default avatarJavier Martinez Canillas <javierm@redhat.com>
Acked-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/all/20220117084156.9338-1-kevin3.tang@gmail.com

v1 -> v2:
- new patch
parent 8668658a

drivers/gpu/drm/sprd/sprd_dpu.c

+5 −0
Original line number Diff line number Diff line
@@ -790,6 +790,11 @@ static int sprd_dpu_context_init(struct sprd_dpu *dpu, 
	int ret;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(dev, "failed to get I/O resource\n");

		return -EINVAL;

	}



	ctx->base = devm_ioremap(dev, res->start, resource_size(res));

	if (!ctx->base) {

		dev_err(dev, "failed to map dpu registers\n");

drivers/gpu/drm/sprd/sprd_dsi.c

+5 −0
Original line number Diff line number Diff line
@@ -907,6 +907,11 @@ static int sprd_dsi_context_init(struct sprd_dsi *dsi, 
	struct resource *res;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(dev, "failed to get I/O resource\n");

		return -EINVAL;

	}



	ctx->base = devm_ioremap(dev, res->start, resource_size(res));

	if (!ctx->base) {

		drm_err(dsi->drm, "failed to map dsi host registers\n");