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, 61 insertions, 0 deletions

diff --git a/tools/sched_ext/Kconfig b/tools/sched_ext/Kconfig
new file mode 100644
index 000000000..275bd97ae
--- /dev/null
+++ b/tools/sched_ext/Kconfig
@@ -0,0 +1,61 @@
+# sched-ext mandatory options
+#
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_DEBUG_INFO_BTF=y
+CONFIG_BPF_JIT_ALWAYS_ON=y
+CONFIG_BPF_JIT_DEFAULT_ON=y
+CONFIG_SCHED_CLASS_EXT=y
+
+# Required by some rust schedulers (e.g. scx_p2dq)
+#
+CONFIG_KALLSYMS_ALL=y
+
+# Required on arm64
+#
+# CONFIG_DEBUG_INFO_REDUCED is not set
+
+# LAVD tracks futex to give an additional time slice for futex holder
+# (i.e., avoiding lock holder preemption) for better system-wide progress.
+# LAVD first tries to use ftrace to trace futex function calls.
+# If that is not available, it tries to use a tracepoint.
+CONFIG_FUNCTION_TRACER=y
+
+# Enable scheduling debugging
+#
+CONFIG_SCHED_DEBUG=y
+
+# Enable extra scheduling features (for a better code coverage while testing
+# the schedulers)
+#
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_SCHED_CORE=y
+CONFIG_SCHED_MC=y
+
+# Enable fully preemptible kernel for a better test coverage of the schedulers
+#
+# CONFIG_PREEMPT_NONE is not set
+# CONFIG_PREEMPT_VOLUNTARY is not set
+CONFIG_PREEMPT=y
+CONFIG_PREEMPT_DYNAMIC=y
+
+# Additional debugging information (useful to catch potential locking issues)
+CONFIG_DEBUG_LOCKDEP=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_PROVE_LOCKING=y
+
+# Bpftrace headers (for additional debug info)
+CONFIG_BPF_EVENTS=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_DYNAMIC_FTRACE=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
+CONFIG_UPROBES=y
+CONFIG_UPROBE_EVENTS=y
+CONFIG_DEBUG_FS=y
+
+# Enable access to kernel configuration and headers at runtime
+CONFIG_IKHEADERS=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_IKCONFIG=y