slimbus: qcom-ngd-ctrl: Add timeout for wait operation

In current driver qcom_slim_ngd_up_worker() indefinitely
waiting for ctrl->qmi_up completion object. This is
resulting in workqueue lockup on Kthread.

Added wait_for_completion_interruptible_timeout to
allow the thread to wait for specific timeout period and
bail out instead waiting infinitely.

Fixes: a899d32 ("slimbus: qcom-ngd-ctrl: add Sub System Restart support")
Cc: [email protected]
Reviewed-by: Konrad Dybcio <[email protected]>
Signed-off-by: Viken Dadhaniya <[email protected]>
Signed-off-by: Srinivas Kandagatla <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Viken Dadhaniya

drivers/slimbus/qcom-ngd-ctrl.c

@@ -1451,7 +1451,11 @@ static void qcom_slim_ngd_up_worker(struct work_struct *work)
 	ctrl = container_of(work, struct qcom_slim_ngd_ctrl, ngd_up_work);
 
 	/* Make sure qmi service is up before continuing */
-	wait_for_completion_interruptible(&ctrl->qmi_up);
+	if (!wait_for_completion_interruptible_timeout(&ctrl->qmi_up,
+						       msecs_to_jiffies(MSEC_PER_SEC))) {
+		dev_err(ctrl->dev, "QMI wait timeout\n");
+		return;
+	}
 
 	mutex_lock(&ctrl->ssr_lock);
 	qcom_slim_ngd_enable(ctrl, true);