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, 38 insertions, 0 deletions

diff --git a/tools/perf/util/trace.h b/tools/perf/util/trace.h
new file mode 100644
index 000000000..fbbcfe6f4
--- /dev/null
+++ b/tools/perf/util/trace.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef UTIL_TRACE_H
+#define UTIL_TRACE_H
+
+#include <stdio.h>  /* for FILE */
+
+enum trace_summary_mode {
+	SUMMARY__NONE = 0,
+	SUMMARY__BY_TOTAL,
+	SUMMARY__BY_THREAD,
+	SUMMARY__BY_CGROUP,
+};
+
+#ifdef HAVE_BPF_SKEL
+
+int trace_prepare_bpf_summary(enum trace_summary_mode mode);
+void trace_start_bpf_summary(void);
+void trace_end_bpf_summary(void);
+int trace_print_bpf_summary(FILE *fp, int max_summary);
+void trace_cleanup_bpf_summary(void);
+
+#else /* !HAVE_BPF_SKEL */
+
+static inline int trace_prepare_bpf_summary(enum trace_summary_mode mode __maybe_unused)
+{
+	return -1;
+}
+static inline void trace_start_bpf_summary(void) {}
+static inline void trace_end_bpf_summary(void) {}
+static inline int trace_print_bpf_summary(FILE *fp __maybe_unused, int max_summary __maybe_unused)
+{
+	return 0;
+}
+static inline void trace_cleanup_bpf_summary(void) {}
+
+#endif /* HAVE_BPF_SKEL */
+
+#endif /* UTIL_TRACE_H */