diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 51ea56b73a97d..3d54c8bbfa86e 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -721,7 +721,6 @@ struct qeth_card_options {
 	struct qeth_vnicc_info vnicc; /* VNICC options */
 	enum qeth_discipline_id layer;
 	enum qeth_ipa_isolation_modes isolation;
-	enum qeth_ipa_isolation_modes prev_isolation;
 	int sniffer;
 	enum qeth_cq cq;
 	char hsuid[9];
@@ -804,14 +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;
@@ -1071,6 +1069,9 @@ int qeth_query_switch_attributes(struct qeth_card *card,
 				  struct qeth_switch_info *sw_info);
 int qeth_query_card_info(struct qeth_card *card,
 			 struct carrier_info *carrier_info);
+int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
+				     enum qeth_ipa_isolation_modes mode);
+
 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset);
 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 			struct sk_buff *skb, struct qeth_hdr *hdr,
@@ -1078,7 +1079,6 @@ int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
 			int elements_needed);
 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
-int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback);
 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
 void qeth_trace_features(struct qeth_card *);
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 88e998de2d032..8a76022fceda4 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -969,7 +969,7 @@ void qeth_clear_ipacmd_list(struct qeth_card *card)
 
 	spin_lock_irqsave(&card->lock, flags);
 	list_for_each_entry(iob, &card->cmd_waiter_list, list)
-		qeth_notify_cmd(iob, -EIO);
+		qeth_notify_cmd(iob, -ECANCELED);
 	spin_unlock_irqrestore(&card->lock, flags);
 }
 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
@@ -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);
@@ -2025,7 +2026,7 @@ static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
 }
 
 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
-						  void *data,
+						  const void *data,
 						  unsigned int data_length)
 {
 	struct qeth_cmd_buffer *iob;
@@ -2436,6 +2437,17 @@ static int qeth_cm_setup(struct qeth_card *card)
 	return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
 }
 
+static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
+{
+	if (link_type == QETH_LINK_TYPE_LANE_TR ||
+	    link_type == QETH_LINK_TYPE_HSTR) {
+		dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
+		return false;
+	}
+
+	return true;
+}
+
 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
 {
 	struct net_device *dev = card->dev;
@@ -2495,8 +2507,8 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 {
 	__u16 mtu, framesize;
 	__u16 len;
-	__u8 link_type;
 	struct qeth_cmd_buffer *iob;
+	u8 link_type = 0;
 
 	QETH_CARD_TEXT(card, 2, "ulpenacb");
 
@@ -2516,9 +2528,11 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 	if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
 		memcpy(&link_type,
 		       QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
-		card->info.link_type = link_type;
-	} else
-		card->info.link_type = 0;
+		if (!qeth_is_supported_link_type(card, link_type))
+			return -EPROTONOSUPPORT;
+	}
+
+	card->info.link_type = link_type;
 	QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
 	return 0;
 }
@@ -3100,7 +3114,6 @@ struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
 					   enum qeth_prot_versions prot,
 					   unsigned int data_length)
 {
-	enum qeth_link_types link_type = card->info.link_type;
 	struct qeth_cmd_buffer *iob;
 	struct qeth_ipacmd_hdr *hdr;
 
@@ -3116,7 +3129,7 @@ struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
 	hdr->command = cmd_code;
 	hdr->initiator = IPA_CMD_INITIATOR_HOST;
 	/* hdr->seqno is set by qeth_send_control_data() */
-	hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
+	hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
 	hdr->rel_adapter_no = (u8) card->dev->dev_port;
 	hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
 	hdr->param_count = 1;
@@ -3199,18 +3212,22 @@ static int qeth_query_setadapterparms_cb(struct qeth_card *card,
 		struct qeth_reply *reply, unsigned long data)
 {
 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct qeth_query_cmds_supp *query_cmd;
 
 	QETH_CARD_TEXT(card, 3, "quyadpcb");
 	if (qeth_setadpparms_inspect_rc(cmd))
 		return -EIO;
 
-	if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
-		card->info.link_type =
-		      cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
+	query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
+	if (query_cmd->lan_type & 0x7f) {
+		if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
+			return -EPROTONOSUPPORT;
+
+		card->info.link_type = query_cmd->lan_type;
 		QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
 	}
-	card->options.adp.supported =
-		cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
+
+	card->options.adp.supported = query_cmd->supported_cmds;
 	return 0;
 }
 
@@ -4541,7 +4558,6 @@ static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
 {
 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 	struct qeth_set_access_ctrl *access_ctrl_req;
-	int fallback = *(int *)reply->param;
 
 	QETH_CARD_TEXT(card, 4, "setaccb");
 
@@ -4555,70 +4571,54 @@ static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
 				 cmd->data.setadapterparms.hdr.return_code);
 	switch (qeth_setadpparms_inspect_rc(cmd)) {
 	case SET_ACCESS_CTRL_RC_SUCCESS:
-		if (card->options.isolation == ISOLATION_MODE_NONE) {
+		if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
 			dev_info(&card->gdev->dev,
 			    "QDIO data connection isolation is deactivated\n");
-		} else {
+		else
 			dev_info(&card->gdev->dev,
 			    "QDIO data connection isolation is activated\n");
-		}
-		break;
+		return 0;
 	case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
 		QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
 				 CARD_DEVID(card));
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return 0;
 	case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
 		QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
 				 CARD_DEVID(card));
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return 0;
 	case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
 		dev_err(&card->gdev->dev, "Adapter does not "
 			"support QDIO data connection isolation\n");
-		break;
+		return -EOPNOTSUPP;
 	case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
 		dev_err(&card->gdev->dev,
 			"Adapter is dedicated. "
 			"QDIO data connection isolation not supported\n");
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return -EOPNOTSUPP;
 	case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
 		dev_err(&card->gdev->dev,
 			"TSO does not permit QDIO data connection isolation\n");
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return -EPERM;
 	case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
 		dev_err(&card->gdev->dev, "The adjacent switch port does not "
 			"support reflective relay mode\n");
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return -EOPNOTSUPP;
 	case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
 		dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
 					"enabled at the adjacent switch port");
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return -EREMOTEIO;
 	case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
 		dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
 					"at the adjacent switch failed\n");
-		break;
+		/* benign error while disabling ISOLATION_MODE_FWD */
+		return 0;
 	default:
-		/* this should never happen */
-		if (fallback)
-			card->options.isolation = card->options.prev_isolation;
-		break;
+		return -EIO;
 	}
-	return (cmd->hdr.return_code) ? -EIO : 0;
 }
 
-static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
-		enum qeth_ipa_isolation_modes isolation, int fallback)
+int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
+				     enum qeth_ipa_isolation_modes mode)
 {
 	int rc;
 	struct qeth_cmd_buffer *iob;
@@ -4627,42 +4627,28 @@ static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
 
 	QETH_CARD_TEXT(card, 4, "setacctl");
 
+	if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
+		dev_err(&card->gdev->dev,
+			"Adapter does not support QDIO data connection isolation\n");
+		return -EOPNOTSUPP;
+	}
+
 	iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
 				   SETADP_DATA_SIZEOF(set_access_ctrl));
 	if (!iob)
 		return -ENOMEM;
 	cmd = __ipa_cmd(iob);
 	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
-	access_ctrl_req->subcmd_code = isolation;
+	access_ctrl_req->subcmd_code = mode;
 
 	rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
-			       &fallback);
-	QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
-	return rc;
-}
-
-int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
-{
-	int rc = 0;
-
-	QETH_CARD_TEXT(card, 4, "setactlo");
-
-	if ((IS_OSD(card) || IS_OSX(card)) &&
-	    qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
-		rc = qeth_setadpparms_set_access_ctrl(card,
-			card->options.isolation, fallback);
-		if (rc) {
-			QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
-					 rc, CARD_DEVID(card));
-			rc = -EOPNOTSUPP;
-		}
-	} else if (card->options.isolation != ISOLATION_MODE_NONE) {
-		card->options.isolation = ISOLATION_MODE_NONE;
-
-		dev_err(&card->gdev->dev, "Adapter does not "
-			"support QDIO data connection isolation\n");
-		rc = -EOPNOTSUPP;
+			       NULL);
+	if (rc) {
+		QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
+		QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
+				 rc, CARD_DEVID(card));
 	}
+
 	return rc;
 }
 
@@ -4850,26 +4836,24 @@ static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
 }
 
 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
-		struct qeth_reply *reply, unsigned long data)
+					 struct qeth_reply *reply,
+					 unsigned long data)
 {
 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
-	struct qeth_qoat_priv *priv;
-	char *resdata;
+	struct qeth_qoat_priv *priv = reply->param;
 	int resdatalen;
 
 	QETH_CARD_TEXT(card, 3, "qoatcb");
 	if (qeth_setadpparms_inspect_rc(cmd))
 		return -EIO;
 
-	priv = (struct qeth_qoat_priv *)reply->param;
 	resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
-	resdata = (char *)data + 28;
 
 	if (resdatalen > (priv->buffer_len - priv->response_len))
 		return -ENOSPC;
 
-	memcpy((priv->buffer + priv->response_len), resdata,
-		resdatalen);
+	memcpy(priv->buffer + priv->response_len,
+	       &cmd->data.setadapterparms.hdr, resdatalen);
 	priv->response_len += resdatalen;
 
 	if (cmd->data.setadapterparms.hdr.seq_no <
@@ -4890,24 +4874,17 @@ static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
 
 	QETH_CARD_TEXT(card, 3, "qoatcmd");
 
-	if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
-		rc = -EOPNOTSUPP;
-		goto out;
-	}
+	if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
+		return -EOPNOTSUPP;
 
-	if (copy_from_user(&oat_data, udata,
-	    sizeof(struct qeth_query_oat_data))) {
-			rc = -EFAULT;
-			goto out;
-	}
+	if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
+		return -EFAULT;
 
 	priv.buffer_len = oat_data.buffer_len;
 	priv.response_len = 0;
 	priv.buffer = vzalloc(oat_data.buffer_len);
-	if (!priv.buffer) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!priv.buffer)
+		return -ENOMEM;
 
 	iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
 				   SETADP_DATA_SIZEOF(query_oat));
@@ -4919,30 +4896,19 @@ static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
 	oat_req = &cmd->data.setadapterparms.data.query_oat;
 	oat_req->subcmd_code = oat_data.command;
 
-	rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
-			       &priv);
+	rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
 	if (!rc) {
-		if (is_compat_task())
-			tmp = compat_ptr(oat_data.ptr);
-		else
-			tmp = (void __user *)(unsigned long)oat_data.ptr;
-
-		if (copy_to_user(tmp, priv.buffer,
-		    priv.response_len)) {
-			rc = -EFAULT;
-			goto out_free;
-		}
-
+		tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
+					 u64_to_user_ptr(oat_data.ptr);
 		oat_data.response_len = priv.response_len;
 
-		if (copy_to_user(udata, &oat_data,
-		    sizeof(struct qeth_query_oat_data)))
+		if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
+		    copy_to_user(udata, &oat_data, sizeof(oat_data)))
 			rc = -EFAULT;
 	}
 
 out_free:
 	vfree(priv.buffer);
-out:
 	return rc;
 }
 
@@ -5331,9 +5297,12 @@ int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
 	    (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
 		card->info.hwtrap = 0;
 
-	rc = qeth_set_access_ctrl_online(card, 0);
-	if (rc)
-		goto out;
+	if (card->options.isolation != ISOLATION_MODE_NONE) {
+		rc = qeth_setadpparms_set_access_ctrl(card,
+						      card->options.isolation);
+		if (rc)
+			goto out;
+	}
 
 	rc = qeth_init_qdio_queues(card);
 	if (rc) {
@@ -6841,7 +6810,7 @@ netdev_features_t qeth_features_check(struct sk_buff *skb,
 
 	/* Traffic with local next-hop is not eligible for some offloads: */
 	if (skb->ip_summed == CHECKSUM_PARTIAL &&
-	    card->options.isolation != ISOLATION_MODE_FWD) {
+	    READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
 		netdev_features_t restricted = 0;
 
 		if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
diff --git a/drivers/s390/net/qeth_core_mpc.c b/drivers/s390/net/qeth_core_mpc.c
index e3f4866c158e4..68c2588b9dcc6 100644
--- a/drivers/s390/net/qeth_core_mpc.c
+++ b/drivers/s390/net/qeth_core_mpc.c
@@ -10,7 +10,7 @@
 #include <asm/cio.h>
 #include "qeth_core_mpc.h"
 
-unsigned char IDX_ACTIVATE_READ[] = {
+const unsigned char IDX_ACTIVATE_READ[] = {
 	0x00, 0x00, 0x80, 0x00,  0x00, 0x00, 0x00, 0x00,
 	0x19, 0x01, 0x01, 0x80,  0x00, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0xc8, 0xc1,
@@ -18,7 +18,7 @@ unsigned char IDX_ACTIVATE_READ[] = {
 	0x00, 0x00
 };
 
-unsigned char IDX_ACTIVATE_WRITE[] = {
+const unsigned char IDX_ACTIVATE_WRITE[] = {
 	0x00, 0x00, 0x80, 0x00,  0x00, 0x00, 0x00, 0x00,
 	0x15, 0x01, 0x01, 0x80,  0x00, 0x00, 0x00, 0x00,
 	0xff, 0xff, 0x00, 0x00,  0x00, 0x00, 0xc8, 0xc1,
@@ -26,7 +26,7 @@ unsigned char IDX_ACTIVATE_WRITE[] = {
 	0x00, 0x00
 };
 
-unsigned char CM_ENABLE[] = {
+const unsigned char CM_ENABLE[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x00, 0x00, 0x00, 0x01,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x63,
 	0x10, 0x00, 0x00, 0x01,
@@ -45,7 +45,7 @@ unsigned char CM_ENABLE[] = {
 	0xff, 0xff, 0xff
 };
 
-unsigned char CM_SETUP[] = {
+const unsigned char CM_SETUP[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x00, 0x00, 0x00, 0x02,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x64,
 	0x10, 0x00, 0x00, 0x01,
@@ -65,7 +65,7 @@ unsigned char CM_SETUP[] = {
 	0x04, 0x06, 0xc8, 0x00
 };
 
-unsigned char ULP_ENABLE[] = {
+const unsigned char ULP_ENABLE[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x00, 0x00, 0x00, 0x03,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x6b,
 	0x10, 0x00, 0x00, 0x01,
@@ -85,7 +85,7 @@ unsigned char ULP_ENABLE[] = {
 	0xf1, 0x00, 0x00
 };
 
-unsigned char ULP_SETUP[] = {
+const unsigned char ULP_SETUP[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x00, 0x00, 0x00, 0x04,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x6c,
 	0x10, 0x00, 0x00, 0x01,
@@ -107,7 +107,7 @@ unsigned char ULP_SETUP[] = {
 	0x00, 0x00, 0x00, 0x00
 };
 
-unsigned char DM_ACT[] = {
+const unsigned char DM_ACT[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x00, 0x00, 0x00, 0x05,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x55,
 	0x10, 0x00, 0x00, 0x01,
@@ -123,7 +123,7 @@ unsigned char DM_ACT[] = {
 	0x05, 0x40, 0x01, 0x01,  0x00
 };
 
-unsigned char IPA_PDU_HEADER[] = {
+const unsigned char IPA_PDU_HEADER[] = {
 	0x00, 0xe0, 0x00, 0x00,  0x77, 0x77, 0x77, 0x77,
 	0x00, 0x00, 0x00, 0x14,  0x00, 0x00, 0x00, 0x00,
 	0x10, 0x00, 0x00, 0x01,  0x00, 0x00, 0x00, 0x00,
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index 9d6f39d8f9ab0..b459def0fb26c 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -13,13 +13,13 @@
 #include <uapi/linux/if_ether.h>
 #include <uapi/linux/in6.h>
 
+extern const unsigned char IPA_PDU_HEADER[];
 #define IPA_PDU_HEADER_SIZE	0x40
 #define QETH_IPA_PDU_LEN_TOTAL(buffer) (buffer + 0x0e)
 #define QETH_IPA_PDU_LEN_PDU1(buffer) (buffer + 0x26)
 #define QETH_IPA_PDU_LEN_PDU2(buffer) (buffer + 0x29)
 #define QETH_IPA_PDU_LEN_PDU3(buffer) (buffer + 0x3a)
 
-extern unsigned char IPA_PDU_HEADER[];
 #define QETH_IPA_CMD_DEST_ADDR(buffer) (buffer + 0x2c)
 
 #define QETH_SEQ_NO_LENGTH	4
@@ -858,7 +858,7 @@ extern const char *qeth_get_ipa_cmd_name(enum qeth_ipa_cmds cmd);
 /* END OF   IP Assist related definitions                                    */
 /*****************************************************************************/
 
-extern unsigned char CM_ENABLE[];
+extern const unsigned char CM_ENABLE[];
 #define CM_ENABLE_SIZE 0x63
 #define QETH_CM_ENABLE_ISSUER_RM_TOKEN(buffer) (buffer + 0x2c)
 #define QETH_CM_ENABLE_FILTER_TOKEN(buffer) (buffer + 0x53)
@@ -868,7 +868,7 @@ extern unsigned char CM_ENABLE[];
 		(PDU_ENCAPSULATION(buffer) + 0x13)
 
 
-extern unsigned char CM_SETUP[];
+extern const unsigned char CM_SETUP[];
 #define CM_SETUP_SIZE 0x64
 #define QETH_CM_SETUP_DEST_ADDR(buffer) (buffer + 0x2c)
 #define QETH_CM_SETUP_CONNECTION_TOKEN(buffer) (buffer + 0x51)
@@ -877,7 +877,7 @@ extern unsigned char CM_SETUP[];
 #define QETH_CM_SETUP_RESP_DEST_ADDR(buffer) \
 		(PDU_ENCAPSULATION(buffer) + 0x1a)
 
-extern unsigned char ULP_ENABLE[];
+extern const unsigned char ULP_ENABLE[];
 #define ULP_ENABLE_SIZE 0x6b
 #define QETH_ULP_ENABLE_LINKNUM(buffer) (buffer + 0x61)
 #define QETH_ULP_ENABLE_DEST_ADDR(buffer) (buffer + 0x2c)
@@ -898,7 +898,7 @@ extern unsigned char ULP_ENABLE[];
 #define QETH_ULP_ENABLE_PROT_TYPE(buffer) (buffer + 0x50)
 #define QETH_IPA_CMD_PROT_TYPE(buffer) (buffer + 0x19)
 
-extern unsigned char ULP_SETUP[];
+extern const unsigned char ULP_SETUP[];
 #define ULP_SETUP_SIZE 0x6c
 #define QETH_ULP_SETUP_DEST_ADDR(buffer) (buffer + 0x2c)
 #define QETH_ULP_SETUP_CONNECTION_TOKEN(buffer) (buffer + 0x51)
@@ -910,7 +910,7 @@ extern unsigned char ULP_SETUP[];
 		(PDU_ENCAPSULATION(buffer) + 0x1a)
 
 
-extern unsigned char DM_ACT[];
+extern const unsigned char DM_ACT[];
 #define DM_ACT_SIZE 0x55
 #define QETH_DM_ACT_DEST_ADDR(buffer) (buffer + 0x2c)
 #define QETH_DM_ACT_CONNECTION_TOKEN(buffer) (buffer + 0x51)
@@ -921,9 +921,8 @@ extern unsigned char DM_ACT[];
 #define QETH_PDU_HEADER_SEQ_NO(buffer) (buffer + 0x1c)
 #define QETH_PDU_HEADER_ACK_SEQ_NO(buffer) (buffer + 0x20)
 
-extern unsigned char IDX_ACTIVATE_READ[];
-extern unsigned char IDX_ACTIVATE_WRITE[];
-
+extern const unsigned char IDX_ACTIVATE_READ[];
+extern const unsigned char IDX_ACTIVATE_WRITE[];
 #define IDX_ACTIVATE_SIZE	0x22
 #define QETH_IDX_ACT_PNO(buffer) (buffer+0x0b)
 #define QETH_IDX_ACT_ISSUER_RM_TOKEN(buffer) (buffer + 0x0c)
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index c901c942fed70..8def82336f53f 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -448,19 +448,17 @@ static ssize_t qeth_dev_isolation_store(struct device *dev,
 		rc = -EINVAL;
 		goto out;
 	}
-	rc = count;
-
-	/* defer IP assist if device is offline (until discipline->set_online)*/
-	card->options.prev_isolation = card->options.isolation;
-	card->options.isolation = isolation;
-	if (qeth_card_hw_is_reachable(card)) {
-		int ipa_rc = qeth_set_access_ctrl_online(card, 1);
-		if (ipa_rc != 0)
-			rc = ipa_rc;
-	}
+
+	if (qeth_card_hw_is_reachable(card))
+		rc = qeth_setadpparms_set_access_ctrl(card, isolation);
+
+	if (!rc)
+		WRITE_ONCE(card->options.isolation, isolation);
+
 out:
 	mutex_unlock(&card->conf_mutex);
-	return rc;
+
+	return rc ? rc : count;
 }
 
 static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 2d3bca3c0141f..ef7a2db7a7245 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 1e50aa0297a37..15a12487ff7a3 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);
@@ -1919,12 +1919,6 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 		return rc;
 
 	if (IS_OSD(card) || IS_OSX(card)) {
-		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
-		    (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
-			pr_info("qeth_l3: ignoring TR device\n");
-			return -ENODEV;
-		}
-
 		card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
 
 		/*IPv6 address autoconfiguration stuff*/
@@ -2004,7 +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;
 }