Fri, Jun 23, 2023 at 02:38:13PM CEST, arkadiusz.kubalewski@intel.com wrote:

From: Vadim Fedorenko <vadim.fedorenko@linux.dev>

One thing I forgot to point out the last time:

[...]	
	

+int
+dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,
+		  const struct dpll_pin_ops *ops, void *priv)
+{
+	int ret;
+
+	if (WARN_ON(!ops) ||
+	    WARN_ON(!ops->state_on_dpll_get) ||
+	    WARN_ON(!ops->direction_get))

Please add check that you don't register to dpll instance which is
unregistered. Similar check needs to be added to pin_on_pin register.

Also, make sure you don't unregister dpll device/pin which has child
pins registered under it.

+		return -EINVAL;
+
+	mutex_lock(&dpll_lock);
+	if (WARN_ON(!(dpll->module == pin->module &&
+		      dpll->clock_id == pin->clock_id)))
+		ret = -EINVAL;
+	else
+		ret = __dpll_pin_register(dpll, pin, ops, priv);
+	mutex_unlock(&dpll_lock);
+
+	return ret;
+}

[...]