1 files changed, 8 insertions, 7 deletions

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 56e4609..20bc9c5 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -509,21 +509,22 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
 		dst->cpu_dp->netdev = ethernet_dev;
 	}
 
+	/* Initialize cpu_port_mask now for drv->setup()
+	 * to have access to a correct value, just like what
+	 * net/dsa/dsa.c::dsa_switch_setup_one does.
+	 */
+	ds->cpu_port_mask |= BIT(index);
+
 	tag_protocol = ds->ops->get_tag_protocol(ds);
 	dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
 	if (IS_ERR(dst->tag_ops)) {
 		dev_warn(ds->dev, "No tagger for this switch\n");
+		ds->cpu_port_mask &= ~BIT(index);
 		return PTR_ERR(dst->tag_ops);
 	}
 
 	dst->rcv = dst->tag_ops->rcv;
 
-	/* Initialize cpu_port_mask now for drv->setup()
-	 * to have access to a correct value, just like what
-	 * net/dsa/dsa.c::dsa_switch_setup_one does.
-	 */
-	ds->cpu_port_mask |= BIT(index);
-
 	return 0;
 }
 
@@ -576,7 +577,7 @@ static int dsa_dst_parse(struct dsa_switch_tree *dst)
 			return err;
 	}
 
-	if (!dst->cpu_dp->netdev) {
+	if (!dst->cpu_dp) {
 		pr_warn("Tree has no master device\n");
 		return -EINVAL;
 	}