diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 6abb35ff49fa..c6a7d4582dc6 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -355,7 +355,8 @@ struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index)
 	list_for_each_entry(mbox, &mbox_cons, node)
 		if (mbox->dev->of_node == spec.np) {
 			chan = mbox->of_xlate(mbox, &spec);
-			break;
+			if (!IS_ERR(chan))
+				break;
 		}
 
 	of_node_put(spec.np);