Dear Wei,
Thank you for your notice. I have received it. I will be fix it later.
Best wishes
Zou Wei <zou_wei@xxxxxxxxxx> 于2021年12月14日周二 17:11写道：
>
> platform_get_resource() may fail and return NULL, so we should
> better check it's return value to avoid a NULL pointer dereference
> a bit later in the code.
>
> Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
> Signed-off-by: Zou Wei <zou_wei@xxxxxxxxxx>
> ---
> drivers/gpu/drm/sprd/sprd_dpu.c | 2 ++
> drivers/gpu/drm/sprd/sprd_dsi.c | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
> index 06a3414..920cb7d 100644
> --- a/drivers/gpu/drm/sprd/sprd_dpu.c
> +++ b/drivers/gpu/drm/sprd/sprd_dpu.c
> @@ -790,6 +790,8 @@ static int sprd_dpu_context_init(struct sprd_dpu *dpu,
> int ret;
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -EINVAL;
> ctx->base = devm_ioremap(dev, res->start, resource_size(res));
> if (!ctx->base) {
> dev_err(dev, "failed to map dpu registers\n");
> diff --git a/drivers/gpu/drm/sprd/sprd_dsi.c b/drivers/gpu/drm/sprd/sprd_dsi.c
> index 911b3cd..c90a950 100644
> --- a/drivers/gpu/drm/sprd/sprd_dsi.c
> +++ b/drivers/gpu/drm/sprd/sprd_dsi.c
> @@ -907,6 +907,8 @@ static int sprd_dsi_context_init(struct sprd_dsi *dsi,
> struct resource *res;
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + 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");
> --
> 2.6.2
>
