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, 21 insertions, 0 deletions

diff --git a/tools/perf/util/c2c.c b/tools/perf/util/c2c.c
new file mode 100644
index 000000000..58c7342df
--- /dev/null
+++ b/tools/perf/util/c2c.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdlib.h>
+#include <linux/kernel.h>
+#include "hist.h"
+#include "c2c.h"
+
+void c2c_fmt_free(struct perf_hpp_fmt *fmt)
+{
+	struct c2c_fmt *c2c_fmt;
+
+	c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
+	free(c2c_fmt);
+}
+
+bool c2c_fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
+{
+	struct c2c_fmt *c2c_a = container_of(a, struct c2c_fmt, fmt);
+	struct c2c_fmt *c2c_b = container_of(b, struct c2c_fmt, fmt);
+
+	return c2c_a->dim == c2c_b->dim;
+}