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, 89 insertions, 0 deletions

diff --git a/tools/power/acpi/Makefile.config b/tools/power/acpi/Makefile.config
new file mode 100644
index 000000000..cd7106876
--- /dev/null
+++ b/tools/power/acpi/Makefile.config
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# tools/power/acpi/Makefile.config - ACPI tool Makefile
+#
+# Copyright (c) 2015, Intel Corporation
+#   Author: Lv Zheng <lv.zheng@intel.com>
+#
+
+ifeq ($(srctree),)
+srctree := $(patsubst %/,%,$(dir $(shell pwd)))
+srctree := $(patsubst %/,%,$(dir $(srctree)))
+#$(info Determined 'srctree' to be $(srctree))
+endif
+
+include $(srctree)/../../scripts/Makefile.include
+
+OUTPUT=$(srctree)/
+ifeq ("$(origin O)", "command line")
+	OUTPUT := $(O)/tools/power/acpi/
+endif
+#$(info Determined 'OUTPUT' to be $(OUTPUT))
+
+# --- CONFIGURATION BEGIN ---
+
+# Set the following to `true' to make a unstripped, unoptimized
+# binary. Leave this set to `false' for production use.
+DEBUG ?=	true
+
+# make the build silent. Set this to something else to make it noisy again.
+V ?=		false
+
+# Prefix to the directories we're installing to
+DESTDIR ?=
+
+# --- CONFIGURATION END ---
+
+# Directory definitions. These are default and most probably
+# do not need to be changed. Please note that DESTDIR is
+# added in front of any of them
+
+bindir ?=	/usr/bin
+sbindir ?=	/usr/sbin
+mandir ?=	/usr/man
+
+# Toolchain: what tools do we use, and what options do they need:
+
+INSTALL = /usr/bin/install -c
+INSTALL_PROGRAM = ${INSTALL}
+INSTALL_DATA  = ${INSTALL} -m 644
+INSTALL_SCRIPT = ${INSTALL_PROGRAM}
+
+# If you are running a cross compiler, you may want to set this
+# to something more interesting, like "arm-linux-".  If you want
+# to compile vs uClibc, that can be done here as well.
+CROSS = #/usr/i386-linux-uclibc/usr/bin/i386-uclibc-
+CROSS_COMPILE ?= $(CROSS)
+LD = $(CC)
+
+# check if compiler option is supported
+cc-supports = ${shell if $(CC) ${1} -S -o /dev/null -x c /dev/null > /dev/null 2>&1; then echo "$(1)"; fi;}
+
+# use '-Os' optimization if available, else use -O2
+OPTIMIZATION := $(call cc-supports,-Os,-O2)
+
+WARNINGS := -Wall
+WARNINGS += $(call cc-supports,-Wstrict-prototypes)
+WARNINGS += $(call cc-supports,-Wdeclaration-after-statement)
+
+KERNEL_INCLUDE := $(OUTPUT)include
+ACPICA_INCLUDE := $(srctree)/../../../drivers/acpi/acpica
+CFLAGS += -D_LINUX -I$(KERNEL_INCLUDE) -I$(ACPICA_INCLUDE)
+CFLAGS += $(WARNINGS)
+MKDIR = mkdir
+
+ifeq ($(strip $(V)),false)
+	QUIET=@
+	ECHO=@echo
+else
+	QUIET=
+	ECHO=@\#
+endif
+
+# if DEBUG is enabled, then we do not strip or optimize
+ifeq ($(strip $(DEBUG)),true)
+	CFLAGS += -O1 -g -DDEBUG
+	STRIPCMD = /bin/true -Since_we_are_debugging
+else
+	CFLAGS += $(OPTIMIZATION) -fomit-frame-pointer
+	STRIPCMD = $(STRIP) -s --remove-section=.note --remove-section=.comment
+endif