Merge branch 's390-qeth-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2019-01-25

please apply a first batch of qeth patches for net-next, primarily touching the
net_device parts of the driver.
In addition to the usual refactoring & code consolidation, patch 7 makes use of
netif_device_detach() to let the stack know when our control plane is down. This
helps quite a bit wrt to overall locking and proper init/shutdown sequencing.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 167 insertions, 337 deletions

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 0ee026947f20..d65650ef6b41 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -741,11 +741,6 @@ struct qeth_discipline {
 					struct qeth_ipa_cmd *cmd);
 };
 
-struct qeth_vlan_vid {
-	struct list_head list;
-	unsigned short vid;
-};
-
 enum qeth_addr_disposition {
 	QETH_DISP_ADDR_DELETE = 0,
 	QETH_DISP_ADDR_DO_NOTHING = 1,
@@ -792,8 +787,6 @@ struct qeth_card {
 	wait_queue_head_t wait_q;
 	spinlock_t mclock;
 	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
-	struct mutex vid_list_mutex;		/* vid_list */
-	struct list_head vid_list;
 	DECLARE_HASHTABLE(mac_htable, 4);
 	DECLARE_HASHTABLE(ip_htable, 4);
 	DECLARE_HASHTABLE(ip_mc_htable, 4);
@@ -802,7 +795,6 @@ struct qeth_card {
 	unsigned long thread_start_mask;
 	unsigned long thread_allowed_mask;
 	unsigned long thread_running_mask;
-	struct task_struct *recovery_task;
 	spinlock_t ip_lock;
 	struct qeth_ipato ipato;
 	struct list_head cmd_waiter_list;
@@ -976,11 +968,8 @@ extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];
 
 struct net_device *qeth_clone_netdev(struct net_device *orig);
 struct qeth_card *qeth_get_card_by_busid(char *bus_id);
-void qeth_set_recovery_task(struct qeth_card *);
-void qeth_clear_recovery_task(struct qeth_card *);
 void qeth_set_allowed_threads(struct qeth_card *, unsigned long , int);
 int qeth_threads_running(struct qeth_card *, unsigned long);
-int qeth_wait_for_threads(struct qeth_card *, unsigned long);
 int qeth_do_run_thread(struct qeth_card *, unsigned long);
 void qeth_clear_thread_start_bit(struct qeth_card *, unsigned long);
 void qeth_clear_thread_running_bit(struct qeth_card *, unsigned long);
@@ -1047,6 +1036,9 @@ netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
 netdev_features_t qeth_features_check(struct sk_buff *skb,
 				      struct net_device *dev,
 				      netdev_features_t features);
+int qeth_open(struct net_device *dev);
+int qeth_stop(struct net_device *dev);
+
 int qeth_vm_request_mac(struct qeth_card *card);
 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
 	      struct qeth_qdio_out_q *queue, int ipv, int cast_type,
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index e63e03143ca7..dcc06e48b70b 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -193,23 +193,6 @@ const char *qeth_get_cardname_short(struct qeth_card *card)
 	return "n/a";
 }
 
-void qeth_set_recovery_task(struct qeth_card *card)
-{
-	card->recovery_task = current;
-}
-EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
-
-void qeth_clear_recovery_task(struct qeth_card *card)
-{
-	card->recovery_task = NULL;
-}
-EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
-
-static bool qeth_is_recovery_task(const struct qeth_card *card)
-{
-	return card->recovery_task == current;
-}
-
 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 			 int clear_start_mask)
 {
@@ -236,15 +219,6 @@ int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 }
 EXPORT_SYMBOL_GPL(qeth_threads_running);
 
-int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
-{
-	if (qeth_is_recovery_task(card))
-		return 0;
-	return wait_event_interruptible(card->wait_q,
-			qeth_threads_running(card, threads) == 0);
-}
-EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
-
 void qeth_clear_working_pool_list(struct qeth_card *card)
 {
 	struct qeth_buffer_pool_entry *pool_entry, *tmp;
@@ -1430,7 +1404,6 @@ static void qeth_setup_card(struct qeth_card *card)
 	spin_lock_init(&card->thread_mask_lock);
 	mutex_init(&card->conf_mutex);
 	mutex_init(&card->discipline_mutex);
-	mutex_init(&card->vid_list_mutex);
 	INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
 	INIT_LIST_HEAD(&card->cmd_waiter_list);
 	init_waitqueue_head(&card->wait_q);
@@ -3558,8 +3531,6 @@ static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
 	card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
 				   + count) % QDIO_MAX_BUFFERS_PER_Q;
 
-	netif_wake_queue(card->dev);
-
 	if (card->options.performance_stats) {
 		int delta_t = qeth_get_micros();
 		delta_t -= card->perf_stats.cq_start_time;
@@ -3928,7 +3899,6 @@ static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
 {
 	struct qdio_buffer *buffer = buf->buffer;
 	bool is_first_elem = true;
-	int flush_cnt = 0;
 
 	__skb_queue_tail(&buf->skb_list, skb);
 
@@ -3949,24 +3919,22 @@ static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
 
 	if (!queue->do_pack) {
 		QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
-		/* set state to PRIMED -> will be flushed */
-		atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
-		flush_cnt = 1;
 	} else {
 		QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
 		if (queue->card->options.performance_stats)
 			queue->card->perf_stats.skbs_sent_pack++;
-		if (buf->next_element_to_fill >=
-				QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
-			/*
-			 * packed buffer if full -> set state PRIMED
-			 * -> will be flushed
-			 */
-			atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
-			flush_cnt = 1;
-		}
+
+		/* If the buffer still has free elements, keep using it. */
+		if (buf->next_element_to_fill <
+		    QETH_MAX_BUFFER_ELEMENTS(queue->card))
+			return 0;
 	}
-	return flush_cnt;
+
+	/* flush out the buffer */
+	atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
+	queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
+				  QDIO_MAX_BUFFERS_PER_Q;
+	return 1;
 }
 
 static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
@@ -3982,7 +3950,6 @@ static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
 	 */
 	if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
 		return -EBUSY;
-	queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
 	qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
 	qeth_flush_buffers(queue, index, 1);
 	return 0;
@@ -4040,10 +4007,9 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 			}
 		}
 	}
-	tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
-	queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
-				  QDIO_MAX_BUFFERS_PER_Q;
-	flush_count += tmp;
+
+	flush_count += qeth_fill_buffer(queue, buffer, skb, hdr, offset,
+					hd_len);
 	if (flush_count)
 		qeth_flush_buffers(queue, start_index, flush_count);
 	else if (!atomic_read(&queue->set_pci_flags_count))
@@ -5154,13 +5120,6 @@ retriable:
 		*carrier_ok = true;
 	}
 
-	if (qeth_netdev_is_registered(card->dev)) {
-		if (*carrier_ok)
-			netif_carrier_on(card->dev);
-		else
-			netif_carrier_off(card->dev);
-	}
-
 	card->options.ipa4.supported_funcs = 0;
 	card->options.ipa6.supported_funcs = 0;
 	card->options.adp.supported_funcs = 0;
@@ -5937,9 +5896,6 @@ int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	if (!card)
 		return -ENODEV;
 
-	if (!qeth_card_hw_is_reachable(card))
-		return -ENODEV;
-
 	if (card->info.type == QETH_CARD_TYPE_OSN)
 		return -EPERM;
 
@@ -6250,8 +6206,6 @@ int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
 	/* Check if we can obtain more accurate information.	 */
 	/* If QUERY_CARD_INFO command is not supported or fails, */
 	/* just return the heuristics that was filled above.	 */
-	if (!qeth_card_hw_is_reachable(card))
-		return -ENODEV;
 	rc = qeth_query_card_info(card, &carrier_info);
 	if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
 		return 0;
@@ -6534,8 +6488,6 @@ static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
 	return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
 }
 
-#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
-			  NETIF_F_IPV6_CSUM | NETIF_F_TSO6)
 /**
  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
  * @dev:	a net_device
@@ -6545,17 +6497,20 @@ void qeth_enable_hw_features(struct net_device *dev)
 	struct qeth_card *card = dev->ml_priv;
 	netdev_features_t features;
 
-	rtnl_lock();
 	features = dev->features;
-	/* force-off any feature that needs an IPA sequence.
+	/* force-off any feature that might need an IPA sequence.
 	 * netdev_update_features() will restart them.
 	 */
-	dev->features &= ~QETH_HW_FEATURES;
+	dev->features &= ~dev->hw_features;
+	/* toggle VLAN filter, so that VIDs are re-programmed: */
+	if (IS_LAYER2(card) && IS_VM_NIC(card)) {
+		dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
+		dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+	}
 	netdev_update_features(dev);
 	if (features != dev->features)
 		dev_warn(&card->gdev->dev,
 			 "Device recovery failed to restore all offload features\n");
-	rtnl_unlock();
 }
 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
 
@@ -6624,10 +6579,7 @@ netdev_features_t qeth_fix_features(struct net_device *dev,
 		features &= ~NETIF_F_TSO;
 	if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
 		features &= ~NETIF_F_TSO6;
-	/* if the card isn't up, remove features that require hw changes */
-	if (card->state == CARD_STATE_DOWN ||
-	    card->state == CARD_STATE_RECOVER)
-		features &= ~QETH_HW_FEATURES;
+
 	QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
 	return features;
 }
@@ -6659,6 +6611,46 @@ netdev_features_t qeth_features_check(struct sk_buff *skb,
 }
 EXPORT_SYMBOL_GPL(qeth_features_check);
 
+int qeth_open(struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	QETH_CARD_TEXT(card, 4, "qethopen");
+	if (card->state == CARD_STATE_UP)
+		return 0;
+	if (card->state != CARD_STATE_SOFTSETUP)
+		return -ENODEV;
+
+	if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
+		return -EIO;
+
+	card->data.state = CH_STATE_UP;
+	card->state = CARD_STATE_UP;
+	netif_start_queue(dev);
+
+	napi_enable(&card->napi);
+	local_bh_disable();
+	napi_schedule(&card->napi);
+	/* kick-start the NAPI softirq: */
+	local_bh_enable();
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qeth_open);
+
+int qeth_stop(struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	QETH_CARD_TEXT(card, 4, "qethstop");
+	netif_tx_disable(dev);
+	if (card->state == CARD_STATE_UP) {
+		card->state = CARD_STATE_SOFTSETUP;
+		napi_disable(&card->napi);
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qeth_stop);
+
 static int __init qeth_core_init(void)
 {
 	int rc;
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index 1ab321926f64..c7fb14a61eed 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -81,6 +81,7 @@ enum qeth_card_types {
 
 #define IS_IQD(card)	((card)->info.type == QETH_CARD_TYPE_IQD)
 #define IS_OSD(card)	((card)->info.type == QETH_CARD_TYPE_OSD)
+#define IS_OSM(card)	((card)->info.type == QETH_CARD_TYPE_OSM)
 #define IS_OSN(card)	((card)->info.type == QETH_CARD_TYPE_OSN)
 #define IS_VM_NIC(card)	((card)->info.guestlan)
 
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index f108d4b44605..82f50cc30b0a 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -25,7 +25,6 @@
 #include "qeth_l2.h"
 
 static int qeth_l2_set_offline(struct ccwgroup_device *);
-static int qeth_l2_stop(struct net_device *);
 static void qeth_bridgeport_query_support(struct qeth_card *card);
 static void qeth_bridge_state_change(struct qeth_card *card,
 					struct qeth_ipa_cmd *cmd);
@@ -98,8 +97,7 @@ static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 	rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 	if (rc == 0) {
 		dev_info(&card->gdev->dev,
-			 "MAC address %pM successfully registered on device %s\n",
-			 mac, card->dev->name);
+			 "MAC address %pM successfully registered\n", mac);
 	} else {
 		switch (rc) {
 		case -EEXIST:
@@ -263,75 +261,28 @@ static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 					    qeth_l2_send_setdelvlan_cb, NULL));
 }
 
-static void qeth_l2_process_vlans(struct qeth_card *card)
-{
-	struct qeth_vlan_vid *id;
-
-	QETH_CARD_TEXT(card, 3, "L2prcvln");
-	mutex_lock(&card->vid_list_mutex);
-	list_for_each_entry(id, &card->vid_list, list) {
-		qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
-	}
-	mutex_unlock(&card->vid_list_mutex);
-}
-
 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 				   __be16 proto, u16 vid)
 {
 	struct qeth_card *card = dev->ml_priv;
-	struct qeth_vlan_vid *id;
-	int rc;
 
 	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 	if (!vid)
 		return 0;
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "aidREC");
-		return 0;
-	}
-	id = kmalloc(sizeof(*id), GFP_KERNEL);
-	if (id) {
-		id->vid = vid;
-		rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
-		if (rc) {
-			kfree(id);
-			return rc;
-		}
-		mutex_lock(&card->vid_list_mutex);
-		list_add_tail(&id->list, &card->vid_list);
-		mutex_unlock(&card->vid_list_mutex);
-	} else {
-		return -ENOMEM;
-	}
-	return 0;
+
+	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 }
 
 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 				    __be16 proto, u16 vid)
 {
-	struct qeth_vlan_vid *id, *tmpid = NULL;
 	struct qeth_card *card = dev->ml_priv;
-	int rc = 0;
 
 	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "kidREC");
+	if (!vid)
 		return 0;
-	}
-	mutex_lock(&card->vid_list_mutex);
-	list_for_each_entry(id, &card->vid_list, list) {
-		if (id->vid == vid) {
-			list_del(&id->list);
-			tmpid = id;
-			break;
-		}
-	}
-	mutex_unlock(&card->vid_list_mutex);
-	if (tmpid) {
-		rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
-		kfree(tmpid);
-	}
-	return rc;
+
+	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 }
 
 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
@@ -343,9 +294,8 @@ static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 	if (card->read.state == CH_STATE_UP &&
 	    card->write.state == CH_STATE_UP &&
 	    (card->state == CARD_STATE_UP)) {
-		if (recovery_mode &&
-		    card->info.type != QETH_CARD_TYPE_OSN) {
-			qeth_l2_stop(card->dev);
+		if (recovery_mode && !IS_OSN(card)) {
+			qeth_stop(card->dev);
 		} else {
 			rtnl_lock();
 			dev_close(card->dev);
@@ -460,6 +410,26 @@ out:
 	return 0;
 }
 
+static void qeth_l2_register_dev_addr(struct qeth_card *card)
+{
+	if (!is_valid_ether_addr(card->dev->dev_addr))
+		qeth_l2_request_initial_mac(card);
+
+	if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
+		card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
+}
+
+static int qeth_l2_validate_addr(struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	if (IS_OSN(card) || (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
+		return eth_validate_addr(dev);
+
+	QETH_CARD_TEXT(card, 4, "nomacadr");
+	return -EPERM;
+}
+
 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 {
 	struct sockaddr *addr = p;
@@ -479,39 +449,22 @@ static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "setmcREC");
-		return -ERESTARTSYS;
-	}
-
-	/* avoid racing against concurrent state change: */
-	if (!mutex_trylock(&card->conf_mutex))
-		return -EAGAIN;
-
-	if (!qeth_card_hw_is_reachable(card)) {
-		ether_addr_copy(dev->dev_addr, addr->sa_data);
-		goto out_unlock;
-	}
-
 	/* don't register the same address twice */
 	if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 	    (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
-		goto out_unlock;
+		return 0;
 
 	/* add the new address, switch over, drop the old */
 	rc = qeth_l2_send_setmac(card, addr->sa_data);
 	if (rc)
-		goto out_unlock;
+		return rc;
 	ether_addr_copy(old_addr, dev->dev_addr);
 	ether_addr_copy(dev->dev_addr, addr->sa_data);
 
 	if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 		qeth_l2_remove_mac(card, old_addr);
 	card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
-
-out_unlock:
-	mutex_unlock(&card->conf_mutex);
-	return rc;
+	return 0;
 }
 
 static void qeth_promisc_to_bridge(struct qeth_card *card)
@@ -586,9 +539,6 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
 		return;
 
 	QETH_CARD_TEXT(card, 3, "setmulti");
-	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
-	    (card->state != CARD_STATE_UP))
-		return;
 
 	spin_lock_bh(&card->mclock);
 
@@ -712,62 +662,6 @@ tx_drop:
 	return NETDEV_TX_OK;
 }
 
-static int __qeth_l2_open(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-	int rc = 0;
-
-	QETH_CARD_TEXT(card, 4, "qethopen");
-	if (card->state == CARD_STATE_UP)
-		return rc;
-	if (card->state != CARD_STATE_SOFTSETUP)
-		return -ENODEV;
-
-	if ((card->info.type != QETH_CARD_TYPE_OSN) &&
-	     (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
-		QETH_CARD_TEXT(card, 4, "nomacadr");
-		return -EPERM;
-	}
-	card->data.state = CH_STATE_UP;
-	card->state = CARD_STATE_UP;
-	netif_start_queue(dev);
-
-	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
-		napi_enable(&card->napi);
-		local_bh_disable();
-		napi_schedule(&card->napi);
-		/* kick-start the NAPI softirq: */
-		local_bh_enable();
-	} else
-		rc = -EIO;
-	return rc;
-}
-
-static int qeth_l2_open(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-
-	QETH_CARD_TEXT(card, 5, "qethope_");
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "openREC");
-		return -ERESTARTSYS;
-	}
-	return __qeth_l2_open(dev);
-}
-
-static int qeth_l2_stop(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-
-	QETH_CARD_TEXT(card, 4, "qethstop");
-	netif_tx_disable(dev);
-	if (card->state == CARD_STATE_UP) {
-		card->state = CARD_STATE_SOFTSETUP;
-		napi_disable(&card->napi);
-	}
-	return 0;
-}
-
 static const struct device_type qeth_l2_devtype = {
 	.name = "qeth_layer2",
 	.groups = qeth_l2_attr_groups,
@@ -783,7 +677,7 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 		if (rc)
 			return rc;
 	}
-	INIT_LIST_HEAD(&card->vid_list);
+
 	hash_init(card->mac_htable);
 	card->info.hwtrap = 0;
 	qeth_l2_vnicc_set_defaults(card);
@@ -822,12 +716,12 @@ static const struct ethtool_ops qeth_l2_osn_ops = {
 };
 
 static const struct net_device_ops qeth_l2_netdev_ops = {
-	.ndo_open		= qeth_l2_open,
-	.ndo_stop		= qeth_l2_stop,
+	.ndo_open		= qeth_open,
+	.ndo_stop		= qeth_stop,
 	.ndo_get_stats		= qeth_get_stats,
 	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
 	.ndo_features_check	= qeth_features_check,
-	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_validate_addr	= qeth_l2_validate_addr,
 	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
 	.ndo_do_ioctl		= qeth_do_ioctl,
 	.ndo_set_mac_address    = qeth_l2_set_mac_address,
@@ -842,9 +736,6 @@ static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 {
 	int rc;
 
-	if (qeth_netdev_is_registered(card->dev))
-		return 0;
-
 	card->dev->priv_flags |= IFF_UNICAST_FLT;
 	card->dev->netdev_ops = &qeth_l2_netdev_ops;
 	if (card->info.type == QETH_CARD_TYPE_OSN) {
@@ -855,10 +746,13 @@ static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 		card->dev->needed_headroom = sizeof(struct qeth_hdr);
 	}
 
-	if (card->info.type == QETH_CARD_TYPE_OSM)
+	if (IS_OSM(card)) {
 		card->dev->features |= NETIF_F_VLAN_CHALLENGED;
-	else
+	} else {
+		if (!IS_VM_NIC(card))
+			card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+	}
 
 	if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 		card->dev->features |= NETIF_F_SG;
@@ -892,8 +786,6 @@ static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 	}
 
-	if (!is_valid_ether_addr(card->dev->dev_addr))
-		qeth_l2_request_initial_mac(card);
 	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 	rc = register_netdev(card->dev);
 	if (!rc && carrier_ok)
@@ -927,6 +819,7 @@ static void qeth_l2_trace_features(struct qeth_card *card)
 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 {
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+	struct net_device *dev = card->dev;
 	int rc = 0;
 	enum qeth_card_states recover_flag;
 	bool carrier_ok;
@@ -948,13 +841,7 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		dev_info(&card->gdev->dev,
 		"The device represents a Bridge Capable Port\n");
 
-	rc = qeth_l2_setup_netdev(card, carrier_ok);
-	if (rc)
-		goto out_remove;
-
-	if (card->info.type != QETH_CARD_TYPE_OSN &&
-	    !qeth_l2_send_setmac(card, card->dev->dev_addr))
-		card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
+	qeth_l2_register_dev_addr(card);
 
 	if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 		if (card->info.hwtrap &&
@@ -984,11 +871,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 			goto out_remove;
 	}
 
-	if (card->info.type != QETH_CARD_TYPE_OSN)
-		qeth_l2_process_vlans(card);
-
-	netif_tx_disable(card->dev);
-
 	rc = qeth_init_qdio_queues(card);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
@@ -999,17 +881,31 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 
-	qeth_enable_hw_features(card->dev);
-	if (recover_flag == CARD_STATE_RECOVER) {
-		if (recovery_mode &&
-		    card->info.type != QETH_CARD_TYPE_OSN) {
-			__qeth_l2_open(card->dev);
-			qeth_l2_set_rx_mode(card->dev);
-		} else {
-			rtnl_lock();
-			dev_open(card->dev, NULL);
-			rtnl_unlock();
+	if (!qeth_netdev_is_registered(dev)) {
+		rc = qeth_l2_setup_netdev(card, carrier_ok);
+		if (rc)
+			goto out_remove;
+	} else {
+		rtnl_lock();
+		if (carrier_ok)
+			netif_carrier_on(dev);
+		else
+			netif_carrier_off(dev);
+
+		netif_device_attach(dev);
+		qeth_enable_hw_features(dev);
+
+		if (recover_flag == CARD_STATE_RECOVER) {
+			if (recovery_mode && !IS_OSN(card)) {
+				if (!qeth_l2_validate_addr(dev)) {
+					qeth_open(dev);
+					qeth_l2_set_rx_mode(dev);
+				}
+			} else {
+				dev_open(dev, NULL);
+			}
 		}
+		rtnl_unlock();
 	}
 	/* let user_space know that device is online */
 	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
@@ -1049,7 +945,11 @@ static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
 	QETH_DBF_TEXT(SETUP, 3, "setoffl");
 	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
 
+	rtnl_lock();
+	netif_device_detach(card->dev);
 	netif_carrier_off(card->dev);
+	rtnl_unlock();
+
 	recover_flag = card->state;
 	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
 		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
@@ -1090,7 +990,6 @@ static int qeth_l2_recover(void *ptr)
 	QETH_CARD_TEXT(card, 2, "recover2");
 	dev_warn(&card->gdev->dev,
 		"A recovery process has been started for the device\n");
-	qeth_set_recovery_task(card);
 	__qeth_l2_set_offline(card->gdev, 1);
 	rc = __qeth_l2_set_online(card->gdev, 1);
 	if (!rc)
@@ -1101,7 +1000,6 @@ static int qeth_l2_recover(void *ptr)
 		dev_warn(&card->gdev->dev, "The qeth device driver "
 				"failed to recover an error on the device\n");
 	}
-	qeth_clear_recovery_task(card);
 	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
 	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
 	return 0;
@@ -1122,7 +1020,6 @@ static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
 {
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 
-	netif_device_detach(card->dev);
 	qeth_set_allowed_threads(card, 0, 1);
 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 	if (gdev->state == CCWGROUP_OFFLINE)
@@ -1152,7 +1049,6 @@ static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
 		rc = __qeth_l2_set_online(card->gdev, 0);
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
-	netif_device_attach(card->dev);
 	if (rc)
 		dev_warn(&card->gdev->dev, "The qeth device driver "
 			"failed to recover an error on the device\n");
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 42a7cdc59b76..59535ecb1487 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -40,7 +40,6 @@
 
 
 static int qeth_l3_set_offline(struct ccwgroup_device *);
-static int qeth_l3_stop(struct net_device *);
 static void qeth_l3_set_rx_mode(struct net_device *dev);
 static int qeth_l3_register_addr_entry(struct qeth_card *,
 		struct qeth_ipaddr *);
@@ -1281,10 +1280,6 @@ static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
 
 	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "kidREC");
-		return 0;
-	}
 	clear_bit(vid, card->active_vlans);
 	qeth_l3_set_rx_mode(dev);
 	return 0;
@@ -1410,7 +1405,7 @@ static void qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
 	    card->write.state == CH_STATE_UP &&
 	    (card->state == CARD_STATE_UP)) {
 		if (recovery_mode)
-			qeth_l3_stop(card->dev);
+			qeth_stop(card->dev);
 		else {
 			rtnl_lock();
 			dev_close(card->dev);
@@ -1473,9 +1468,7 @@ static void qeth_l3_set_rx_mode(struct net_device *dev)
 	int i, rc;
 
 	QETH_CARD_TEXT(card, 3, "setmulti");
-	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
-	    (card->state != CARD_STATE_UP))
-		return;
+
 	if (!card->options.sniffer) {
 		spin_lock_bh(&card->mclock);
 
@@ -2100,56 +2093,6 @@ tx_drop:
 	return NETDEV_TX_OK;
 }
 
-static int __qeth_l3_open(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-	int rc = 0;
-
-	QETH_CARD_TEXT(card, 4, "qethopen");
-	if (card->state == CARD_STATE_UP)
-		return rc;
-	if (card->state != CARD_STATE_SOFTSETUP)
-		return -ENODEV;
-	card->data.state = CH_STATE_UP;
-	card->state = CARD_STATE_UP;
-	netif_start_queue(dev);
-
-	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
-		napi_enable(&card->napi);
-		local_bh_disable();
-		napi_schedule(&card->napi);
-		/* kick-start the NAPI softirq: */
-		local_bh_enable();
-	} else
-		rc = -EIO;
-	return rc;
-}
-
-static int qeth_l3_open(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-
-	QETH_CARD_TEXT(card, 5, "qethope_");
-	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
-		QETH_CARD_TEXT(card, 3, "openREC");
-		return -ERESTARTSYS;
-	}
-	return __qeth_l3_open(dev);
-}
-
-static int qeth_l3_stop(struct net_device *dev)
-{
-	struct qeth_card *card = dev->ml_priv;
-
-	QETH_CARD_TEXT(card, 4, "qethstop");
-	netif_tx_disable(dev);
-	if (card->state == CARD_STATE_UP) {
-		card->state = CARD_STATE_SOFTSETUP;
-		napi_disable(&card->napi);
-	}
-	return 0;
-}
-
 static const struct ethtool_ops qeth_l3_ethtool_ops = {
 	.get_link = ethtool_op_get_link,
 	.get_strings = qeth_core_get_strings,
@@ -2193,8 +2136,8 @@ static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
 }
 
 static const struct net_device_ops qeth_l3_netdev_ops = {
-	.ndo_open		= qeth_l3_open,
-	.ndo_stop		= qeth_l3_stop,
+	.ndo_open		= qeth_open,
+	.ndo_stop		= qeth_stop,
 	.ndo_get_stats		= qeth_get_stats,
 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
 	.ndo_validate_addr	= eth_validate_addr,
@@ -2208,8 +2151,8 @@ static const struct net_device_ops qeth_l3_netdev_ops = {
 };
 
 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
-	.ndo_open		= qeth_l3_open,
-	.ndo_stop		= qeth_l3_stop,
+	.ndo_open		= qeth_open,
+	.ndo_stop		= qeth_stop,
 	.ndo_get_stats		= qeth_get_stats,
 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
 	.ndo_features_check	= qeth_l3_osa_features_check,
@@ -2229,9 +2172,6 @@ static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
 	unsigned int headroom;
 	int rc;
 
-	if (qeth_netdev_is_registered(card->dev))
-		return 0;
-
 	if (card->info.type == QETH_CARD_TYPE_OSD ||
 	    card->info.type == QETH_CARD_TYPE_OSX) {
 		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
@@ -2347,6 +2287,7 @@ static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
 static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 {
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+	struct net_device *dev = card->dev;
 	int rc = 0;
 	enum qeth_card_states recover_flag;
 	bool carrier_ok;
@@ -2364,10 +2305,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		goto out_remove;
 	}
 
-	rc = qeth_l3_setup_netdev(card, carrier_ok);
-	if (rc)
-		goto out_remove;
-
 	if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 		if (card->info.hwtrap &&
 		    qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
@@ -2397,7 +2334,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		if (rc)
 			QETH_DBF_TEXT_(SETUP, 2, "5err%04x", rc);
 	}
-	netif_tx_disable(card->dev);
 
 	rc = qeth_init_qdio_queues(card);
 	if (rc) {
@@ -2410,14 +2346,27 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	qeth_l3_recover_ip(card);
 
-	qeth_enable_hw_features(card->dev);
-	if (recover_flag == CARD_STATE_RECOVER) {
+	if (!qeth_netdev_is_registered(dev)) {
+		rc = qeth_l3_setup_netdev(card, carrier_ok);
+		if (rc)
+			goto out_remove;
+	} else {
 		rtnl_lock();
-		if (recovery_mode) {
-			__qeth_l3_open(card->dev);
-			qeth_l3_set_rx_mode(card->dev);
-		} else {
-			dev_open(card->dev, NULL);
+		if (carrier_ok)
+			netif_carrier_on(dev);
+		else
+			netif_carrier_off(dev);
+
+		netif_device_attach(dev);
+		qeth_enable_hw_features(dev);
+
+		if (recover_flag == CARD_STATE_RECOVER) {
+			if (recovery_mode) {
+				qeth_open(dev);
+				qeth_l3_set_rx_mode(dev);
+			} else {
+				dev_open(dev, NULL);
+			}
 		}
 		rtnl_unlock();
 	}
@@ -2459,7 +2408,11 @@ static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
 	QETH_DBF_TEXT(SETUP, 3, "setoffl");
 	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
 
+	rtnl_lock();
+	netif_device_detach(card->dev);
 	netif_carrier_off(card->dev);
+	rtnl_unlock();
+
 	recover_flag = card->state;
 	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
 		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
@@ -2506,7 +2459,6 @@ static int qeth_l3_recover(void *ptr)
 	QETH_CARD_TEXT(card, 2, "recover2");
 	dev_warn(&card->gdev->dev,
 		"A recovery process has been started for the device\n");
-	qeth_set_recovery_task(card);
 	__qeth_l3_set_offline(card->gdev, 1);
 	rc = __qeth_l3_set_online(card->gdev, 1);
 	if (!rc)
@@ -2517,7 +2469,6 @@ static int qeth_l3_recover(void *ptr)
 		dev_warn(&card->gdev->dev, "The qeth device driver "
 				"failed to recover an error on the device\n");
 	}
-	qeth_clear_recovery_task(card);
 	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
 	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
 	return 0;
@@ -2527,7 +2478,6 @@ static int qeth_l3_pm_suspend(struct ccwgroup_device *gdev)
 {
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 
-	netif_device_detach(card->dev);
 	qeth_set_allowed_threads(card, 0, 1);
 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 	if (gdev->state == CCWGROUP_OFFLINE)
@@ -2557,7 +2507,6 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
 		rc = __qeth_l3_set_online(card->gdev, 0);
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
-	netif_device_attach(card->dev);
 	if (rc)
 		dev_warn(&card->gdev->dev, "The qeth device driver "
 			"failed to recover an error on the device\n");