From: Julian Wiedmann <jwi@linux.ibm.com>
Date: Tue, 14 Jul 2020 16:23:04 +0200
Subject: s390/qeth: unify RX-mode hashtables
Git-commit: 0973292f579a91ebd3b2866a0eed27d26717acdf
Patch-mainline: v5.9-rc1
References: jsc#SLE-13690

To keep track of the addresses programmed from an RX modeset, we have
two separate hashtables (L2: mac_htable, L3: ip_mc_htable).

These are never used at the same time, so unify them into a single
rx_mode_addrs hashtable.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/s390/net/qeth_core.h      |  3 +--
 drivers/s390/net/qeth_core_main.c |  1 +
 drivers/s390/net/qeth_l2_main.c   |  9 ++++-----
 drivers/s390/net/qeth_l3_main.c   | 13 ++++++-------
 4 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index c77a87105ea8..3d54c8bbfa86 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -803,14 +803,13 @@ struct qeth_card {
 	struct workqueue_struct *event_wq;
 	struct workqueue_struct *cmd_wq;
 	wait_queue_head_t wait_q;
-	DECLARE_HASHTABLE(mac_htable, 4);
 	DECLARE_HASHTABLE(ip_htable, 4);
 	DECLARE_HASHTABLE(local_addrs4, 4);
 	DECLARE_HASHTABLE(local_addrs6, 4);
 	spinlock_t local_addrs4_lock;
 	spinlock_t local_addrs6_lock;
 	struct mutex ip_lock;
-	DECLARE_HASHTABLE(ip_mc_htable, 4);
+	DECLARE_HASHTABLE(rx_mode_addrs, 4);
 	struct work_struct rx_mode_work;
 	struct work_struct kernel_thread_starter;
 	spinlock_t thread_mask_lock;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 053a25e34e4b..01a280b5e8d2 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1647,6 +1647,7 @@ static void qeth_setup_card(struct qeth_card *card)
 	qeth_init_qdio_info(card);
 	INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
 	INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
+	hash_init(card->rx_mode_addrs);
 	hash_init(card->local_addrs4);
 	hash_init(card->local_addrs6);
 	spin_lock_init(&card->local_addrs4_lock);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 2d3bca3c0141..ef7a2db7a724 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -156,7 +156,7 @@ static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
 	struct hlist_node *tmp;
 	int i;
 
-	hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
+	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 		hash_del(&mac->hnode);
 		kfree(mac);
 	}
@@ -438,7 +438,7 @@ static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 	u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 	struct qeth_mac *mac;
 
-	hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
+	hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
 		if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 			mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 			return;
@@ -452,7 +452,7 @@ static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 	ether_addr_copy(mac->mac_addr, ha->addr);
 	mac->disp_flag = QETH_DISP_ADDR_ADD;
 
-	hash_add(card->mac_htable, &mac->hnode, mac_hash);
+	hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
 }
 
 static void qeth_l2_rx_mode_work(struct work_struct *work)
@@ -475,7 +475,7 @@ static void qeth_l2_rx_mode_work(struct work_struct *work)
 		qeth_l2_add_mac(card, ha);
 	netif_addr_unlock_bh(dev);
 
-	hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
+	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 		switch (mac->disp_flag) {
 		case QETH_DISP_ADDR_DELETE:
 			qeth_l2_remove_mac(card, mac->mac_addr);
@@ -601,7 +601,6 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 			return rc;
 	}
 
-	hash_init(card->mac_htable);
 	INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
 	return 0;
 }
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index d4ce653ff111..15a12487ff7a 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -58,7 +58,7 @@ static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
 	struct qeth_ipaddr *addr;
 
 	if (query->is_multicast) {
-		hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
+		hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
 			if (qeth_l3_addr_match_ip(addr, query))
 				return addr;
 	} else {
@@ -239,7 +239,7 @@ static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 	struct hlist_node *tmp;
 	int i;
 
-	hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
+	hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 		hash_del(&addr->hnode);
 		kfree(addr);
 	}
@@ -1093,7 +1093,7 @@ static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
 		if (!ipm)
 			continue;
 
-		hash_add(card->ip_mc_htable, &ipm->hnode,
+		hash_add(card->rx_mode_addrs, &ipm->hnode,
 			 qeth_l3_ipaddr_hash(ipm));
 	}
 
@@ -1124,8 +1124,8 @@ static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
 		if (!ipm)
 			continue;
 
-		hash_add(card->ip_mc_htable,
-				&ipm->hnode, qeth_l3_ipaddr_hash(ipm));
+		hash_add(card->rx_mode_addrs, &ipm->hnode,
+			 qeth_l3_ipaddr_hash(ipm));
 
 	}
 	read_unlock_bh(&in6_dev->lock);
@@ -1219,7 +1219,7 @@ static void qeth_l3_rx_mode_work(struct work_struct *work)
 			vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
 		rtnl_unlock();
 
-		hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
+		hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 			switch (addr->disp_flag) {
 			case QETH_DISP_ADDR_DELETE:
 				rc = qeth_l3_deregister_addr_entry(card, addr);
@@ -1998,7 +1998,6 @@ static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
 		}
 	}
 
-	hash_init(card->ip_mc_htable);
 	INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
 	return 0;
 }