drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform devicegrafted

platform_device_register_data() can fail and return an ERR_PTR, but the
return value is used without checking, leading to an invalid pointer
being stored in ddp_comp[].dev and passed to component_match_add() and
mtk_ddp_comp_init(), which could result in a kernel crash.

Add an IS_ERR() check to jump to the error handling path on failure.

Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195")
Cc: stable@vger.kernel.org
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/livepatch/Makefile b/scripts/livepatch/Makefile
new file mode 100644
index 000000000..17b590213
--- /dev/null
+++ b/scripts/livepatch/Makefile
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+# Standalone Makefile for developer tooling (not part of kbuild).
+
+SHELLCHECK := $(shell which shellcheck 2> /dev/null)
+
+SRCS := \
+  klp-build
+
+.DEFAULT_GOAL := help
+.PHONY: help
+help:
+	@echo "  check      - Run shellcheck on $(SRCS)"
+	@echo "  help       - Show this help message"
+
+.PHONY: check
+check:
+ifndef SHELLCHECK
+	$(error shellcheck is not installed. Please install it to run checks)
+endif
+	@$(SHELLCHECK) $(SHELLCHECK_OPTIONS) $(SRCS)