diff --git a/scst/src/scst_main.c b/scst/src/scst_main.c
index ddcd82d60..54953a476 100644
--- a/scst/src/scst_main.c
+++ b/scst/src/scst_main.c
@@ -80,9 +80,10 @@ struct mutex scst_mutex;
 EXPORT_SYMBOL_GPL(scst_mutex);
 
 /*
- * Secondary level main mutex, inner for scst_mutex. Needed for
+ * Second level main mutex, inner to scst_mutex and dev_pr_mutex. Needed for
  * __scst_pr_register_all_tg_pt(), since we can't use scst_mutex there,
- * because of the circular locking dependency with dev_pr_mutex.
+ * because its caller already holds dev_pr_mutex, hence circular locking
+ * dependency is possible.
  */
 struct mutex scst_mutex2;
 
diff --git a/scst/src/scst_pres.c b/scst/src/scst_pres.c
index 557368b99..80ba46b66 100644
--- a/scst/src/scst_pres.c
+++ b/scst/src/scst_pres.c
@@ -1212,8 +1212,8 @@ static int scst_pr_register_with_spec_i_pt(struct scst_cmd *cmd,
 			TRACE_PR("Wildcard iSCSI TransportID %s",
 				&transport_id[4]);
 			/*
-			 * We can't use scst_mutex here, because of the
-			 * circular locking dependency with dev_pr_mutex.
+			 * We can't use scst_mutex here because the caller
+			 * already holds dev_pr_mutex.
 			 */
 			spin_lock_bh(&dev->dev_lock);
 			list_for_each_entry(t, &dev->dev_tgt_dev_list,
@@ -1320,8 +1320,8 @@ static void scst_pr_unregister_all_tg_pt(struct scst_device *dev,
 	TRACE_ENTRY();
 
 	/*
-	 * We can't use scst_mutex here, because of the circular locking
-	 * dependency with dev_pr_mutex.
+	 * We can't use scst_mutex here since the caller already holds
+	 * dev_pr_mutex.
 	 */
 	mutex_lock(&scst_mutex2);
 
@@ -1407,8 +1407,8 @@ static int scst_pr_register_all_tg_pt(struct scst_cmd *cmd, uint8_t *buffer,
 	TRACE_ENTRY();
 
 	/*
-	 * We can't use scst_mutex here, because of the circular locking
-	 * dependency with dev_pr_mutex.
+	 * We can't use scst_mutex here because the caller already holds
+	 * dev_pr_mutex.
 	 */
 	mutex_lock(&scst_mutex2);