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, 27 insertions, 0 deletions

diff --git a/drivers/input/mouse/focaltech.h b/drivers/input/mouse/focaltech.h
new file mode 100644
index 000000000..0d9023254
--- /dev/null
+++ b/drivers/input/mouse/focaltech.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Focaltech TouchPad PS/2 mouse driver
+ *
+ * Copyright (c) 2014 Red Hat Inc.
+ * Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com>
+ *
+ * Red Hat authors:
+ *
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#ifndef _FOCALTECH_H
+#define _FOCALTECH_H
+
+int focaltech_detect(struct psmouse *psmouse, bool set_properties);
+
+#ifdef CONFIG_MOUSE_PS2_FOCALTECH
+int focaltech_init(struct psmouse *psmouse);
+#else
+static inline int focaltech_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+#endif
+
+#endif