[LLC]: station source mac address

kill unnecessary llc_station_mac_sa.
Signed-off-by: NJoonwoo Park <joonwpark81@gmail.com>
Acked-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/llc.h

@@ -65,7 +65,6 @@ struct llc_sap {
 
 extern struct list_head llc_sap_list;
 extern rwlock_t llc_sap_list_lock;
-extern unsigned char llc_station_mac_sa[ETH_ALEN];
 
 extern int llc_rcv(struct sk_buff *skb, struct net_device *dev,
 		   struct packet_type *pt, struct net_device *orig_dev);

net/llc/llc_core.c

@@ -25,8 +25,6 @@
 LIST_HEAD(llc_sap_list);
 DEFINE_RWLOCK(llc_sap_list_lock);
 
-unsigned char llc_station_mac_sa[ETH_ALEN];
-
 /**
  *	llc_sap_alloc - allocates and initializes sap.
  *
@@ -37,8 +35,8 @@ static struct llc_sap *llc_sap_alloc(void)
 	struct llc_sap *sap = kzalloc(sizeof(*sap), GFP_ATOMIC);
 
 	if (sap) {
+		/* sap->laddr.mac - leave as a null, it's filled by bind */
 		sap->state = LLC_SAP_STATE_ACTIVE;
-		memcpy(sap->laddr.mac, llc_station_mac_sa, ETH_ALEN);
 		rwlock_init(&sap->sk_list.lock);
 		atomic_set(&sap->refcnt, 1);
 	}
@@ -167,10 +165,6 @@ static int __init llc_init(void)
 	if (dev != NULL)
 		dev = next_net_device(dev);
 
-	if (dev != NULL)
-		memcpy(llc_station_mac_sa, dev->dev_addr, ETH_ALEN);
-	else
-		memset(llc_station_mac_sa, 0, ETH_ALEN);
 	dev_add_pack(&llc_packet_type);
 	dev_add_pack(&llc_tr_packet_type);
 	return 0;

net/llc/llc_station.c

@@ -259,7 +259,7 @@ static int llc_station_ac_send_null_dsap_xid_c(struct sk_buff *skb)
 		goto out;
 	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, 0, LLC_PDU_CMD);
 	llc_pdu_init_as_xid_cmd(nskb, LLC_XID_NULL_CLASS_2, 127);
-	rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, llc_station_mac_sa);
+	rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, skb->dev->dev_addr);
 	if (unlikely(rc))
 		goto free;
 	llc_station_send_pdu(nskb);
@@ -283,7 +283,7 @@ static int llc_station_ac_send_xid_r(struct sk_buff *skb)
 	llc_pdu_decode_ssap(skb, &dsap);
 	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
 	llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
-	rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, mac_da);
+	rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
 	if (unlikely(rc))
 		goto free;
 	llc_station_send_pdu(nskb);
@@ -307,7 +307,7 @@ static int llc_station_ac_send_test_r(struct sk_buff *skb)
 	llc_pdu_decode_ssap(skb, &dsap);
 	llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
 	llc_pdu_init_as_test_rsp(nskb, skb);
-	rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, mac_da);
+	rc = llc_mac_hdr_init(nskb, skb->dev->dev_addr, mac_da);
 	if (unlikely(rc))
 		goto free;
 	llc_station_send_pdu(nskb);