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
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");
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");