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, 26 insertions, 0 deletions

diff --git a/tools/tracing/rtla/Makefile.standalone b/tools/tracing/rtla/Makefile.standalone
new file mode 100644
index 000000000..86d07cb52
--- /dev/null
+++ b/tools/tracing/rtla/Makefile.standalone
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+VERSION		:= $(shell cat VERSION)
+CFLAGS		+= $$($(PKG_CONFIG) --cflags libtracefs)
+EXTLIBS		+= $$($(PKG_CONFIG) --libs libtracefs)
+
+rtla:
+
+include Makefile.rtla
+
+SRC		:= $(wildcard src/*.c)
+HDR		:= $(wildcard src/*.h)
+OBJ		:= $(SRC:.c=.o)
+DOCSRC		:= Documentation/
+
+rtla: $(OBJ)
+	$(CC) -o rtla $(LDFLAGS) $(OBJ) $(LIBS) $(EXTLIBS)
+	$(info This is a deprecated method to compile RTLA, please compile from Linux kernel source)
+
+.PHONY: clean tarball
+clean: doc_clean
+	@test ! -f rtla || rm rtla
+	@test ! -f rtla-static || rm rtla-static
+	@test ! -f src/rtla.o || rm src/rtla.o
+	@test ! -f $(TARBALL) || rm -f $(TARBALL)
+	@rm -rf *~ $(OBJ) *.tar.$(CEXT)