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drm/sprd: check the platform_get_resource() return value

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

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

v1 -> v2:
- new patch
This commit is contained in:
Kevin Tang 2021-12-24 21:37:00 +08:00 committed by kevin3.tang
parent 8668658aeb
commit 73792e6e66
2 changed files with 10 additions and 0 deletions
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5
drivers/gpu/drm/sprd/sprd_dpu.c
View File

@ -790,6 +790,11 @@ static int sprd_dpu_context_init(struct sprd_dpu *dpu,
int ret; int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 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)); ctx->base = devm_ioremap(dev, res->start, resource_size(res));
if (!ctx->base) { if (!ctx->base) {
dev_err(dev, "failed to map dpu registers\n"); dev_err(dev, "failed to map dpu registers\n");

5
drivers/gpu/drm/sprd/sprd_dsi.c
View File

@ -907,6 +907,11 @@ static int sprd_dsi_context_init(struct sprd_dsi *dsi,
struct resource *res; struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 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)); ctx->base = devm_ioremap(dev, res->start, resource_size(res));
if (!ctx->base) { if (!ctx->base) {
drm_err(dsi->drm, "failed to map dsi host registers\n"); drm_err(dsi->drm, "failed to map dsi host registers\n");