3 files changed, 7 insertions, 10 deletions
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 4ec5b7f85d51..09d9286b27cc 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -153,6 +153,9 @@ static void dsa_switch_mdb_add_bitmap(struct dsa_switch *ds,
 {
 	int port;
 
+	if (!ds->ops->port_mdb_add)
+		return;
+
 	for_each_set_bit(port, bitmap, ds->num_ports)
 		ds->ops->port_mdb_add(ds, port, mdb);
 }
diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 6ebbd799c4eb..67a1bc635a7b 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -28,6 +28,7 @@
  *
  * RSV - VID[9]:
  *	To be used for further expansion of SWITCH_ID or for other purposes.
+ *	Must be transmitted as zero and ignored on receive.
  *
  * SWITCH_ID - VID[8:6]:
  *	Index of switch within DSA tree. Must be between 0 and
@@ -35,6 +36,7 @@
  *
  * RSV - VID[5:4]:
  *	To be used for further expansion of PORT or for other purposes.
+ *	Must be transmitted as zero and ignored on receive.
  *
  * PORT - VID[3:0]:
  *	Index of switch port. Must be between 0 and DSA_MAX_PORTS - 1.
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 26363d72d25b..47ee88163a9d 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -165,6 +165,7 @@ static struct sk_buff
 					    "Expected meta frame, is %12llx "
 					    "in the DSA master multicast filter?\n",
 					    SJA1105_META_DMAC);
+			kfree_skb(sp->data->stampable_skb);
 		}
 
 		/* Hold a reference to avoid dsa_switch_rcv
@@ -211,17 +212,8 @@ static struct sk_buff
 		 * for further processing up the network stack.
 		 */
 		kfree_skb(skb);
-
-		skb = skb_copy(stampable_skb, GFP_ATOMIC);
-		if (!skb) {
-			dev_err_ratelimited(dp->ds->dev,
-					    "Failed to copy stampable skb\n");
-			spin_unlock(&sp->data->meta_lock);
-			return NULL;
-		}
+		skb = stampable_skb;
 		sja1105_transfer_meta(skb, meta);
-		/* The cached copy will be freed now */
-		skb_unref(stampable_skb);
 
 		spin_unlock(&sp->data->meta_lock);
 	}