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, 86 insertions, 0 deletions

diff --git a/tools/power/pm-graph/Makefile b/tools/power/pm-graph/Makefile
new file mode 100644
index 000000000..aeddbaf2d
--- /dev/null
+++ b/tools/power/pm-graph/Makefile
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2013, Intel Corporation.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms and conditions of the GNU General Public License,
+# version 2, as published by the Free Software Foundation.
+#
+# This program is distributed in the hope it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# Authors:
+#	 Todd Brandt <todd.e.brandt@linux.intel.com>
+
+# Prefix to the directories we're installing to
+DESTDIR ?=
+
+# 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
+MANDIR ?=	/usr/share/man
+LIBDIR ?=	/usr/lib
+
+# Toolchain: what tools do we use, and what options do they need:
+INSTALL = /usr/bin/install
+INSTALL_DATA  = ${INSTALL} -m 644
+
+all:
+	@echo "Nothing to build"
+
+install : uninstall
+	$(INSTALL) -d  $(DESTDIR)$(LIBDIR)/pm-graph
+	$(INSTALL) sleepgraph.py $(DESTDIR)$(LIBDIR)/pm-graph
+	$(INSTALL) bootgraph.py $(DESTDIR)$(LIBDIR)/pm-graph
+	$(INSTALL) -d  $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/cgskip.txt $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/freeze-callgraph.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/freeze.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/freeze-dev.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/standby-callgraph.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/standby.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/standby-dev.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/suspend-callgraph.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/suspend.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/suspend-dev.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+	$(INSTALL_DATA) config/suspend-x2-proc.cfg $(DESTDIR)$(LIBDIR)/pm-graph/config
+
+	$(INSTALL) -d  $(DESTDIR)$(BINDIR)
+	ln -s ../lib/pm-graph/bootgraph.py $(DESTDIR)$(BINDIR)/bootgraph
+	ln -s ../lib/pm-graph/sleepgraph.py $(DESTDIR)$(BINDIR)/sleepgraph
+
+	$(INSTALL) -d  $(DESTDIR)$(MANDIR)/man8
+	$(INSTALL) bootgraph.8 $(DESTDIR)$(MANDIR)/man8
+	$(INSTALL) sleepgraph.8 $(DESTDIR)$(MANDIR)/man8
+
+uninstall :
+	rm -f $(DESTDIR)$(MANDIR)/man8/bootgraph.8
+	rm -f $(DESTDIR)$(MANDIR)/man8/sleepgraph.8
+
+	rm -f $(DESTDIR)$(BINDIR)/bootgraph
+	rm -f $(DESTDIR)$(BINDIR)/sleepgraph
+
+	rm -f $(DESTDIR)$(LIBDIR)/pm-graph/config/*
+	if [ -d $(DESTDIR)$(LIBDIR)/pm-graph/config ] ; then \
+		rmdir $(DESTDIR)$(LIBDIR)/pm-graph/config; \
+	fi;
+	rm -f $(DESTDIR)$(LIBDIR)/pm-graph/__pycache__/*
+	if [ -d $(DESTDIR)$(LIBDIR)/pm-graph/__pycache__ ] ; then \
+		rmdir $(DESTDIR)$(LIBDIR)/pm-graph/__pycache__; \
+	fi;
+	rm -f $(DESTDIR)$(LIBDIR)/pm-graph/*
+	if [ -d $(DESTDIR)$(LIBDIR)/pm-graph ] ; then \
+		rmdir $(DESTDIR)$(LIBDIR)/pm-graph; \
+	fi;
+
+help:
+	@echo  'Building targets:'
+	@echo  '  all		  - Nothing to build'
+	@echo  '  install	  - Install the program and create necessary directories'
+	@echo  '  uninstall	  - Remove installed files and directories'
+
+.PHONY: all install uninstall help