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, 53 insertions, 0 deletions

diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c
new file mode 100644
index 000000000..fe6c67c01
--- /dev/null
+++ b/sound/soc/sof/trace.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2022 Intel Corporation
+
+#include "sof-priv.h"
+
+int sof_fw_trace_init(struct snd_sof_dev *sdev)
+{
+	const struct sof_ipc_fw_tracing_ops *fw_tracing = sof_ipc_get_ops(sdev, fw_tracing);
+
+	if (!fw_tracing) {
+		dev_info(sdev->dev, "Firmware tracing is not available\n");
+		sdev->fw_trace_is_supported = false;
+
+		return 0;
+	}
+
+	return fw_tracing->init(sdev);
+}
+
+void sof_fw_trace_free(struct snd_sof_dev *sdev)
+{
+	if (!sdev->fw_trace_is_supported)
+		return;
+
+	if (sdev->ipc->ops->fw_tracing->free)
+		sdev->ipc->ops->fw_tracing->free(sdev);
+}
+
+void sof_fw_trace_fw_crashed(struct snd_sof_dev *sdev)
+{
+	if (!sdev->fw_trace_is_supported)
+		return;
+
+	if (sdev->ipc->ops->fw_tracing->fw_crashed)
+		sdev->ipc->ops->fw_tracing->fw_crashed(sdev);
+}
+
+void sof_fw_trace_suspend(struct snd_sof_dev *sdev, pm_message_t pm_state)
+{
+	if (!sdev->fw_trace_is_supported)
+		return;
+
+	sdev->ipc->ops->fw_tracing->suspend(sdev, pm_state);
+}
+
+int sof_fw_trace_resume(struct snd_sof_dev *sdev)
+{
+	if (!sdev->fw_trace_is_supported)
+		return 0;
+
+	return sdev->ipc->ops->fw_tracing->resume(sdev);
+}