usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stopgrafted

cc_debounce_dwork is queued from the set_cc() and start_toggling()
callbacks, which run from TCPM's kthread worker.  port_stop() returns
before tcpm_unregister_port() destroys that worker.  Flushing the worker
during unregister may therefore run a callback which queues the delayed
work after port_stop() has returned.

The delayed work can then run after devres has freed pmic_typec_port.

Use disable_delayed_work_sync() in port_stop() to cancel a pending
instance and prevent the TCPM callbacks from queueing another one.

This issue was found by an in-house static analysis tool.

Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Cc: stable <stable@kernel.org>  # v6.10+
Assisted-by: Codex:gpt-5.6
Signed-off-by: Fan Wu <fanwu01@zju.edu.cn>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260820135307.153773-2-fanwu01@zju.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 82 insertions, 0 deletions

diff --git a/tools/perf/util/libbfd.h b/tools/perf/util/libbfd.h
new file mode 100644
index 000000000..953886f3d
--- /dev/null
+++ b/tools/perf/util/libbfd.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_LIBBFD_H
+#define __PERF_LIBBFD_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct annotate_args;
+struct build_id;
+struct dso;
+struct inline_node;
+struct symbol;
+
+#ifdef HAVE_LIBBFD_SUPPORT
+int libbfd__addr2line(const char *dso_name, u64 addr,
+		char **file, unsigned int *line, struct dso *dso,
+		bool unwind_inlines, struct inline_node *node,
+		struct symbol *sym);
+
+
+void dso__free_a2l_libbfd(struct dso *dso);
+
+int symbol__disassemble_libbfd(const char *filename, struct symbol *sym,
+			     struct annotate_args *args);
+
+int libbfd__read_build_id(const char *filename, struct build_id *bid);
+
+int libbfd_filename__read_debuglink(const char *filename, char *debuglink, size_t size);
+
+int symbol__disassemble_bpf_libbfd(struct symbol *sym, struct annotate_args *args);
+
+#else // !defined(HAVE_LIBBFD_SUPPORT)
+#include "annotate.h"
+
+static inline int libbfd__addr2line(const char *dso_name __always_unused,
+				u64 addr __always_unused,
+				char **file __always_unused,
+				unsigned int *line __always_unused,
+				struct dso *dso __always_unused,
+				bool unwind_inlines __always_unused,
+				struct inline_node *node __always_unused,
+				struct symbol *sym __always_unused)
+{
+	return -1;
+}
+
+
+static inline void dso__free_a2l_libbfd(struct dso *dso __always_unused)
+{
+}
+
+static inline int symbol__disassemble_libbfd(const char *filename __always_unused,
+					struct symbol *sym __always_unused,
+					struct annotate_args *args __always_unused)
+{
+	return -1;
+}
+
+static inline int libbfd__read_build_id(const char *filename __always_unused,
+					struct build_id *bid __always_unused)
+{
+	return -1;
+}
+
+static inline int libbfd_filename__read_debuglink(const char *filename __always_unused,
+						char *debuglink __always_unused,
+						size_t size __always_unused)
+{
+	return -1;
+}
+
+static inline int symbol__disassemble_bpf_libbfd(struct symbol *sym __always_unused,
+						 struct annotate_args *args __always_unused)
+{
+	return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF;
+}
+
+#endif // defined(HAVE_LIBBFD_SUPPORT)
+
+#endif /* __PERF_LIBBFD_H */