1 files changed, 339 insertions, 322 deletions

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 8e1474f1ffac..49f64eb3eab0 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -65,7 +65,6 @@ static struct mutex qeth_mod_mutex;
 static void qeth_send_control_data_cb(struct qeth_channel *,
 			struct qeth_cmd_buffer *);
 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
-static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
 static void qeth_free_buffer_pool(struct qeth_card *);
 static int qeth_qdio_establish(struct qeth_card *);
 static void qeth_free_qdio_buffers(struct qeth_card *);
@@ -73,9 +72,6 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
 		struct qeth_qdio_out_buffer *buf,
 		enum iucv_tx_notify notification);
 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
-static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
-		struct qeth_qdio_out_buffer *buf,
-		enum qeth_qdio_buffer_states newbufstate);
 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
 
 struct workqueue_struct *qeth_wq;
@@ -476,7 +472,6 @@ static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 	if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 					QETH_QDIO_BUF_HANDLED_DELAYED)) {
 		/* for recovery situations */
-		q->bufs[bidx]->aob = q->bufstates[bidx].aob;
 		qeth_init_qdio_out_buf(q, bidx);
 		QETH_CARD_TEXT(q->card, 2, "clprecov");
 	}
@@ -489,6 +484,7 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
 	struct qaob *aob;
 	struct qeth_qdio_out_buffer *buffer;
 	enum iucv_tx_notify notification;
+	unsigned int i;
 
 	aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 	QETH_CARD_TEXT(card, 5, "haob");
@@ -512,11 +508,18 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
 	}
 	qeth_notify_skbs(buffer->q, buffer, notification);
 
-	buffer->aob = NULL;
-	qeth_clear_output_buffer(buffer->q, buffer,
-				 QETH_QDIO_BUF_HANDLED_DELAYED);
+	/* Free dangling allocations. The attached skbs are handled by
+	 * qeth_cleanup_handled_pending().
+	 */
+	for (i = 0;
+	     i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
+	     i++) {
+		if (aob->sba[i] && buffer->is_header[i])
+			kmem_cache_free(qeth_core_header_cache,
+					(void *) aob->sba[i]);
+	}
+	atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 
-	/* from here on: do not touch buffer anymore */
 	qdio_release_aob(aob);
 }
 
@@ -528,15 +531,24 @@ static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 	    queue == card->qdio.no_in_queues - 1;
 }
 
+static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
+{
+	ccw->cmd_code = cmd_code;
+	ccw->flags = CCW_FLAG_SLI;
+	ccw->count = len;
+	ccw->cda = (__u32) __pa(data);
+}
+
 static int __qeth_issue_next_read(struct qeth_card *card)
 {
-	int rc;
+	struct qeth_channel *channel = &card->read;
 	struct qeth_cmd_buffer *iob;
+	int rc;
 
 	QETH_CARD_TEXT(card, 5, "issnxrd");
-	if (card->read.state != CH_STATE_UP)
+	if (channel->state != CH_STATE_UP)
 		return -EIO;
-	iob = qeth_get_buffer(&card->read);
+	iob = qeth_get_buffer(channel);
 	if (!iob) {
 		dev_warn(&card->gdev->dev, "The qeth device driver "
 			"failed to recover an error on the device\n");
@@ -544,14 +556,14 @@ static int __qeth_issue_next_read(struct qeth_card *card)
 			"available\n", dev_name(&card->gdev->dev));
 		return -ENOMEM;
 	}
-	qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
+	qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 	QETH_CARD_TEXT(card, 6, "noirqpnd");
-	rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
+	rc = ccw_device_start(channel->ccwdev, channel->ccw,
 			      (addr_t) iob, 0, 0);
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 			"rc=%i\n", dev_name(&card->gdev->dev), rc);
-		atomic_set(&card->read.irq_pending, 0);
+		atomic_set(&channel->irq_pending, 0);
 		card->read_or_write_problem = 1;
 		qeth_schedule_recovery(card);
 		wake_up(&card->wait_q);
@@ -649,8 +661,7 @@ static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 						cmd->hdr.return_code, card);
 				}
 				card->lan_online = 0;
-				if (card->dev && netif_carrier_ok(card->dev))
-					netif_carrier_off(card->dev);
+				netif_carrier_off(card->dev);
 				return NULL;
 			case IPA_CMD_STARTLAN:
 				dev_info(&card->gdev->dev,
@@ -741,21 +752,6 @@ static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 	return card;
 }
 
-static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
-		__u32 len)
-{
-	struct qeth_card *card;
-
-	card = CARD_FROM_CDEV(channel->ccwdev);
-	QETH_CARD_TEXT(card, 4, "setupccw");
-	if (channel == &card->read)
-		memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
-	else
-		memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
-	channel->ccw.count = len;
-	channel->ccw.cda = (__u32) __pa(iob);
-}
-
 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 {
 	__u8 index;
@@ -903,11 +899,22 @@ out:
 	qeth_release_buffer(channel, iob);
 }
 
-static int qeth_setup_channel(struct qeth_channel *channel)
+static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
 {
 	int cnt;
 
 	QETH_DBF_TEXT(SETUP, 2, "setupch");
+
+	channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+	if (!channel->ccw)
+		return -ENOMEM;
+	channel->state = CH_STATE_DOWN;
+	atomic_set(&channel->irq_pending, 0);
+	init_waitqueue_head(&channel->wait_q);
+
+	if (!alloc_buffers)
+		return 0;
+
 	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 		channel->iob[cnt].data =
 			kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
@@ -919,15 +926,14 @@ static int qeth_setup_channel(struct qeth_channel *channel)
 		channel->iob[cnt].rc = 0;
 	}
 	if (cnt < QETH_CMD_BUFFER_NO) {
+		kfree(channel->ccw);
 		while (cnt-- > 0)
 			kfree(channel->iob[cnt].data);
 		return -ENOMEM;
 	}
 	channel->io_buf_no = 0;
-	atomic_set(&channel->irq_pending, 0);
 	spin_lock_init(&channel->iob_lock);
 
-	init_waitqueue_head(&channel->wait_q);
 	return 0;
 }
 
@@ -1261,8 +1267,7 @@ static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
 }
 
 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
-		struct qeth_qdio_out_buffer *buf,
-		enum qeth_qdio_buffer_states newbufstate)
+				     struct qeth_qdio_out_buffer *buf)
 {
 	int i;
 
@@ -1270,23 +1275,19 @@ static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
 	if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
 		atomic_dec(&queue->set_pci_flags_count);
 
-	if (newbufstate == QETH_QDIO_BUF_EMPTY) {
-		qeth_release_skbs(buf);
-	}
+	qeth_release_skbs(buf);
+
 	for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
 		if (buf->buffer->element[i].addr && buf->is_header[i])
 			kmem_cache_free(qeth_core_header_cache,
 				buf->buffer->element[i].addr);
 		buf->is_header[i] = 0;
-		buf->buffer->element[i].length = 0;
-		buf->buffer->element[i].addr = NULL;
-		buf->buffer->element[i].eflags = 0;
-		buf->buffer->element[i].sflags = 0;
 	}
-	buf->buffer->element[15].eflags = 0;
-	buf->buffer->element[15].sflags = 0;
+
+	qeth_scrub_qdio_buffer(buf->buffer,
+			       QETH_MAX_BUFFER_ELEMENTS(queue->card));
 	buf->next_element_to_fill = 0;
-	atomic_set(&buf->state, newbufstate);
+	atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
 }
 
 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
@@ -1297,7 +1298,7 @@ static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
 		if (!q->bufs[j])
 			continue;
 		qeth_cleanup_handled_pending(q, j, 1);
-		qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
+		qeth_clear_output_buffer(q, q->bufs[j]);
 		if (free) {
 			kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
 			q->bufs[j] = NULL;
@@ -1339,6 +1340,7 @@ static void qeth_clean_channel(struct qeth_channel *channel)
 	QETH_DBF_TEXT(SETUP, 2, "freech");
 	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 		kfree(channel->iob[cnt].data);
+	kfree(channel->ccw);
 }
 
 static void qeth_set_single_write_queues(struct qeth_card *card)
@@ -1395,6 +1397,10 @@ static void qeth_init_qdio_info(struct qeth_card *card)
 {
 	QETH_DBF_TEXT(SETUP, 4, "intqdinf");
 	atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
+	card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
+	card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
+	card->qdio.no_out_queues = QETH_MAX_QUEUES;
+
 	/* inbound */
 	card->qdio.no_in_queues = 1;
 	card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
@@ -1407,12 +1413,10 @@ static void qeth_init_qdio_info(struct qeth_card *card)
 	INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
 }
 
-static void qeth_set_intial_options(struct qeth_card *card)
+static void qeth_set_initial_options(struct qeth_card *card)
 {
 	card->options.route4.type = NO_ROUTER;
 	card->options.route6.type = NO_ROUTER;
-	card->options.fake_broadcast = 0;
-	card->options.performance_stats = 0;
 	card->options.rx_sg_cb = QETH_RX_SG_CB;
 	card->options.isolation = ISOLATION_MODE_NONE;
 	card->options.cq = QETH_CQ_DISABLED;
@@ -1455,19 +1459,13 @@ static void qeth_start_kernel_thread(struct work_struct *work)
 }
 
 static void qeth_buffer_reclaim_work(struct work_struct *);
-static int qeth_setup_card(struct qeth_card *card)
+static void qeth_setup_card(struct qeth_card *card)
 {
-
 	QETH_DBF_TEXT(SETUP, 2, "setupcrd");
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 
-	card->read.state  = CH_STATE_DOWN;
-	card->write.state = CH_STATE_DOWN;
-	card->data.state  = CH_STATE_DOWN;
+	card->info.type = CARD_RDEV(card)->id.driver_info;
 	card->state = CARD_STATE_DOWN;
-	card->lan_online = 0;
-	card->read_or_write_problem = 0;
-	card->dev = NULL;
 	spin_lock_init(&card->mclock);
 	spin_lock_init(&card->lock);
 	spin_lock_init(&card->ip_lock);
@@ -1475,24 +1473,15 @@ static int qeth_setup_card(struct qeth_card *card)
 	mutex_init(&card->conf_mutex);
 	mutex_init(&card->discipline_mutex);
 	mutex_init(&card->vid_list_mutex);
-	card->thread_start_mask = 0;
-	card->thread_allowed_mask = 0;
-	card->thread_running_mask = 0;
 	INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
 	INIT_LIST_HEAD(&card->cmd_waiter_list);
 	init_waitqueue_head(&card->wait_q);
-	/* initial options */
-	qeth_set_intial_options(card);
+	qeth_set_initial_options(card);
 	/* IP address takeover */
 	INIT_LIST_HEAD(&card->ipato.entries);
-	card->ipato.enabled = false;
-	card->ipato.invert4 = false;
-	card->ipato.invert6 = false;
-	/* init QDIO stuff */
 	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);
-	return 0;
 }
 
 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
@@ -1509,19 +1498,23 @@ static struct qeth_card *qeth_alloc_card(void)
 	struct qeth_card *card;
 
 	QETH_DBF_TEXT(SETUP, 2, "alloccrd");
-	card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
+	card = kzalloc(sizeof(*card), GFP_KERNEL);
 	if (!card)
 		goto out;
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
-	if (qeth_setup_channel(&card->read))
+	if (qeth_setup_channel(&card->read, true))
 		goto out_ip;
-	if (qeth_setup_channel(&card->write))
+	if (qeth_setup_channel(&card->write, true))
 		goto out_channel;
+	if (qeth_setup_channel(&card->data, false))
+		goto out_data;
 	card->options.layer2 = -1;
 	card->qeth_service_level.seq_print = qeth_core_sl_print;
 	register_service_level(&card->qeth_service_level);
 	return card;
 
+out_data:
+	qeth_clean_channel(&card->write);
 out_channel:
 	qeth_clean_channel(&card->read);
 out_ip:
@@ -1530,19 +1523,6 @@ out:
 	return NULL;
 }
 
-static void qeth_determine_card_type(struct qeth_card *card)
-{
-	QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
-
-	card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
-	card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
-	card->info.type = CARD_RDEV(card)->id.driver_info;
-	card->qdio.no_out_queues = QETH_MAX_QUEUES;
-	if (card->info.type == QETH_CARD_TYPE_IQD)
-		card->info.is_multicast_different = 0x0103;
-	qeth_update_from_chp_desc(card);
-}
-
 static int qeth_clear_channel(struct qeth_channel *channel)
 {
 	unsigned long flags;
@@ -1683,13 +1663,10 @@ static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
 	if (!rcd_buf)
 		return -ENOMEM;
 
-	channel->ccw.cmd_code = ciw->cmd;
-	channel->ccw.cda = (__u32) __pa(rcd_buf);
-	channel->ccw.count = ciw->count;
-	channel->ccw.flags = CCW_FLAG_SLI;
+	qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
 	channel->state = CH_STATE_RCD;
 	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
-	ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
+	ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				       QETH_RCD_PARM, LPM_ANYPATH, 0,
 				       QETH_RCD_TIMEOUT);
 	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
@@ -1860,15 +1837,13 @@ static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
 	if (!iob)
 		return -ENOMEM;
 	iob->callback = idx_reply_cb;
-	memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
-	channel->ccw.count = QETH_BUFSIZE;
-	channel->ccw.cda = (__u32) __pa(iob->data);
+	qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 
 	wait_event(card->wait_q,
 		   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
 	QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
 	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
-	rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
+	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, QETH_TIMEOUT);
 	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 
@@ -1911,9 +1886,8 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel,
 	if (!iob)
 		return -ENOMEM;
 	iob->callback = idx_reply_cb;
-	memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
-	channel->ccw.count = IDX_ACTIVATE_SIZE;
-	channel->ccw.cda = (__u32) __pa(iob->data);
+	qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
+		       iob->data);
 	if (channel == &card->write) {
 		memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
 		memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
@@ -1924,7 +1898,7 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel,
 		memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
 		       &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
 	}
-	tmp = ((__u8)card->info.portno) | 0x80;
+	tmp = ((u8)card->dev->dev_port) | 0x80;
 	memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
 	memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
 	       &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
@@ -1939,7 +1913,7 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel,
 		   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
 	QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
 	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
-	rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
+	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, QETH_TIMEOUT);
 	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 
@@ -1991,20 +1965,20 @@ static void qeth_idx_write_cb(struct qeth_channel *channel,
 
 	if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
 		if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
-			dev_err(&card->write.ccwdev->dev,
+			dev_err(&channel->ccwdev->dev,
 				"The adapter is used exclusively by another "
 				"host\n");
 		else
 			QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
 				" negative reply\n",
-				dev_name(&card->write.ccwdev->dev));
+				dev_name(&channel->ccwdev->dev));
 		goto out;
 	}
 	memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
 	if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
 		QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
 			"function level mismatch (sent: 0x%x, received: "
-			"0x%x)\n", dev_name(&card->write.ccwdev->dev),
+			"0x%x)\n", dev_name(&channel->ccwdev->dev),
 			card->info.func_level, temp);
 		goto out;
 	}
@@ -2032,20 +2006,20 @@ static void qeth_idx_read_cb(struct qeth_channel *channel,
 	if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
 		switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
 		case QETH_IDX_ACT_ERR_EXCL:
-			dev_err(&card->write.ccwdev->dev,
+			dev_err(&channel->ccwdev->dev,
 				"The adapter is used exclusively by another "
 				"host\n");
 			break;
 		case QETH_IDX_ACT_ERR_AUTH:
 		case QETH_IDX_ACT_ERR_AUTH_USER:
-			dev_err(&card->read.ccwdev->dev,
+			dev_err(&channel->ccwdev->dev,
 				"Setting the device online failed because of "
 				"insufficient authorization\n");
 			break;
 		default:
 			QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
 				" negative reply\n",
-				dev_name(&card->read.ccwdev->dev));
+				dev_name(&channel->ccwdev->dev));
 		}
 		QETH_CARD_TEXT_(card, 2, "idxread%c",
 			QETH_IDX_ACT_CAUSE_CODE(iob->data));
@@ -2056,7 +2030,7 @@ static void qeth_idx_read_cb(struct qeth_channel *channel,
 	if (temp != qeth_peer_func_level(card->info.func_level)) {
 		QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
 			"level mismatch (sent: 0x%x, received: 0x%x)\n",
-			dev_name(&card->read.ccwdev->dev),
+			dev_name(&channel->ccwdev->dev),
 			card->info.func_level, temp);
 		goto out;
 	}
@@ -2073,7 +2047,7 @@ out:
 void qeth_prepare_control_data(struct qeth_card *card, int len,
 		struct qeth_cmd_buffer *iob)
 {
-	qeth_setup_ccw(&card->write, iob->data, len);
+	qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
 	iob->callback = qeth_release_buffer;
 
 	memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
@@ -2120,6 +2094,7 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 				unsigned long cb_cmd),
 		void *reply_param)
 {
+	struct qeth_channel *channel = iob->channel;
 	int rc;
 	unsigned long flags;
 	struct qeth_reply *reply = NULL;
@@ -2129,7 +2104,7 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 	QETH_CARD_TEXT(card, 2, "sendctl");
 
 	if (card->read_or_write_problem) {
-		qeth_release_buffer(iob->channel, iob);
+		qeth_release_buffer(channel, iob);
 		return -EIO;
 	}
 	reply = qeth_alloc_reply(card);
@@ -2141,7 +2116,7 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 
 	init_waitqueue_head(&reply->wait_q);
 
-	while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
+	while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
 
 	if (IS_IPA(iob->data)) {
 		cmd = __ipa_cmd(iob);
@@ -2161,21 +2136,21 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 	timeout = jiffies + event_timeout;
 
 	QETH_CARD_TEXT(card, 6, "noirqpnd");
-	spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
-	rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
+	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, event_timeout);
-	spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
 			"ccw_device_start rc = %i\n",
-			dev_name(&card->write.ccwdev->dev), rc);
+			dev_name(&channel->ccwdev->dev), rc);
 		QETH_CARD_TEXT_(card, 2, " err%d", rc);
 		spin_lock_irqsave(&card->lock, flags);
 		list_del_init(&reply->list);
 		qeth_put_reply(reply);
 		spin_unlock_irqrestore(&card->lock, flags);
-		qeth_release_buffer(iob->channel, iob);
-		atomic_set(&card->write.irq_pending, 0);
+		qeth_release_buffer(channel, iob);
+		atomic_set(&channel->irq_pending, 0);
 		wake_up(&card->wait_q);
 		return rc;
 	}
@@ -2282,19 +2257,42 @@ static int qeth_cm_setup(struct qeth_card *card)
 
 }
 
-static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
+static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
 {
-	switch (card->info.type) {
-	case QETH_CARD_TYPE_IQD:
-		return card->info.max_mtu;
-	case QETH_CARD_TYPE_OSD:
-	case QETH_CARD_TYPE_OSX:
-		if (!card->options.layer2)
-			return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */
-		/* fall through */
-	default:
-		return ETH_DATA_LEN;
+	struct net_device *dev = card->dev;
+	unsigned int new_mtu;
+
+	if (!max_mtu) {
+		/* IQD needs accurate max MTU to set up its RX buffers: */
+		if (IS_IQD(card))
+			return -EINVAL;
+		/* tolerate quirky HW: */
+		max_mtu = ETH_MAX_MTU;
+	}
+
+	rtnl_lock();
+	if (IS_IQD(card)) {
+		/* move any device with default MTU to new max MTU: */
+		new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
+
+		/* adjust RX buffer size to new max MTU: */
+		card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
+		if (dev->max_mtu && dev->max_mtu != max_mtu)
+			qeth_free_qdio_buffers(card);
+	} else {
+		if (dev->mtu)
+			new_mtu = dev->mtu;
+		/* default MTUs for first setup: */
+		else if (card->options.layer2)
+			new_mtu = ETH_DATA_LEN;
+		else
+			new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
 	}
+
+	dev->max_mtu = max_mtu;
+	dev->mtu = min(new_mtu, max_mtu);
+	rtnl_unlock();
+	return 0;
 }
 
 static int qeth_get_mtu_outof_framesize(int framesize)
@@ -2313,21 +2311,6 @@ static int qeth_get_mtu_outof_framesize(int framesize)
 	}
 }
 
-static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
-{
-	switch (card->info.type) {
-	case QETH_CARD_TYPE_OSD:
-	case QETH_CARD_TYPE_OSM:
-	case QETH_CARD_TYPE_OSX:
-	case QETH_CARD_TYPE_IQD:
-		return ((mtu >= 576) &&
-			(mtu <= card->info.max_mtu));
-	case QETH_CARD_TYPE_OSN:
-	default:
-		return 1;
-	}
-}
-
 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 		unsigned long data)
 {
@@ -2346,29 +2329,10 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 	if (card->info.type == QETH_CARD_TYPE_IQD) {
 		memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
 		mtu = qeth_get_mtu_outof_framesize(framesize);
-		if (!mtu) {
-			iob->rc = -EINVAL;
-			QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
-			return 0;
-		}
-		if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
-			/* frame size has changed */
-			if (card->dev &&
-			    ((card->dev->mtu == card->info.initial_mtu) ||
-			     (card->dev->mtu > mtu)))
-				card->dev->mtu = mtu;
-			qeth_free_qdio_buffers(card);
-		}
-		card->info.initial_mtu = mtu;
-		card->info.max_mtu = mtu;
-		card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
 	} else {
-		card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
-			iob->data);
-		card->info.initial_mtu = min(card->info.max_mtu,
-					qeth_get_initial_mtu_for_card(card));
-		card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
+		mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
 	}
+	*(u16 *)reply->param = mtu;
 
 	memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
 	if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
@@ -2382,11 +2346,19 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 	return 0;
 }
 
+static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
+{
+	if (IS_OSN(card))
+		return QETH_PROT_OSN2;
+	return (card->options.layer2 == 1) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
+}
+
 static int qeth_ulp_enable(struct qeth_card *card)
 {
-	int rc;
-	char prot_type;
+	u8 prot_type = qeth_mpc_select_prot_type(card);
 	struct qeth_cmd_buffer *iob;
+	u16 max_mtu;
+	int rc;
 
 	/*FIXME: trace view callbacks*/
 	QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
@@ -2394,25 +2366,17 @@ static int qeth_ulp_enable(struct qeth_card *card)
 	iob = qeth_wait_for_buffer(&card->write);
 	memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
 
-	*(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
-		(__u8) card->info.portno;
-	if (card->options.layer2)
-		if (card->info.type == QETH_CARD_TYPE_OSN)
-			prot_type = QETH_PROT_OSN2;
-		else
-			prot_type = QETH_PROT_LAYER2;
-	else
-		prot_type = QETH_PROT_TCPIP;
-
+	*(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
 	memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
 	memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
 	       &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
 	memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
 	       &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
 	rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
-				    qeth_ulp_enable_cb, NULL);
-	return rc;
-
+				    qeth_ulp_enable_cb, &max_mtu);
+	if (rc)
+		return rc;
+	return qeth_update_max_mtu(card, max_mtu);
 }
 
 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
@@ -2467,32 +2431,20 @@ static int qeth_ulp_setup(struct qeth_card *card)
 
 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
 {
-	int rc;
 	struct qeth_qdio_out_buffer *newbuf;
 
-	rc = 0;
 	newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
-	if (!newbuf) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!newbuf)
+		return -ENOMEM;
+
 	newbuf->buffer = q->qdio_bufs[bidx];
 	skb_queue_head_init(&newbuf->skb_list);
 	lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
 	newbuf->q = q;
-	newbuf->aob = NULL;
 	newbuf->next_pending = q->bufs[bidx];
 	atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
 	q->bufs[bidx] = newbuf;
-	if (q->bufstates) {
-		q->bufstates[bidx].user = newbuf;
-		QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
-		QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
-		QETH_CARD_TEXT_(q->card, 2, "%lx",
-				(long) newbuf->next_pending);
-	}
-out:
-	return rc;
+	return 0;
 }
 
 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
@@ -2902,8 +2854,7 @@ int qeth_init_qdio_queues(struct qeth_card *card)
 				   QDIO_MAX_BUFFERS_PER_Q);
 		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
 			qeth_clear_output_buffer(card->qdio.out_qs[i],
-					card->qdio.out_qs[i]->bufs[j],
-					QETH_QDIO_BUF_EMPTY);
+						 card->qdio.out_qs[i]->bufs[j]);
 		}
 		card->qdio.out_qs[i]->card = card;
 		card->qdio.out_qs[i]->next_buf_to_fill = 0;
@@ -2936,7 +2887,7 @@ static void qeth_fill_ipacmd_header(struct qeth_card *card,
 	cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
 	/* cmd->hdr.seqno is set by qeth_send_control_data() */
 	cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
-	cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
+	cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
 	if (card->options.layer2)
 		cmd->hdr.prim_version_no = 2;
 	else
@@ -2966,9 +2917,10 @@ struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
 }
 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
 
-void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
-		char prot_type)
+void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob)
 {
+	u8 prot_type = qeth_mpc_select_prot_type(card);
+
 	memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
 	memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
 	memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
@@ -2988,18 +2940,9 @@ int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
 		void *reply_param)
 {
 	int rc;
-	char prot_type;
 
 	QETH_CARD_TEXT(card, 4, "sendipa");
-
-	if (card->options.layer2)
-		if (card->info.type == QETH_CARD_TYPE_OSN)
-			prot_type = QETH_PROT_OSN2;
-		else
-			prot_type = QETH_PROT_LAYER2;
-	else
-		prot_type = QETH_PROT_TCPIP;
-	qeth_prepare_ipa_cmd(card, iob, prot_type);
+	qeth_prepare_ipa_cmd(card, iob);
 	rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
 						iob, reply_cb, reply_param);
 	if (rc == -ETIME) {
@@ -3070,7 +3013,7 @@ static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
 	return iob;
 }
 
-int qeth_query_setadapterparms(struct qeth_card *card)
+static int qeth_query_setadapterparms(struct qeth_card *card)
 {
 	int rc;
 	struct qeth_cmd_buffer *iob;
@@ -3083,7 +3026,6 @@ int qeth_query_setadapterparms(struct qeth_card *card)
 	rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
 	return rc;
 }
-EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
 
 static int qeth_query_ipassists_cb(struct qeth_card *card,
 		struct qeth_reply *reply, unsigned long data)
@@ -3123,7 +3065,8 @@ static int qeth_query_ipassists_cb(struct qeth_card *card,
 	return 0;
 }
 
-int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
+static int qeth_query_ipassists(struct qeth_card *card,
+				enum qeth_prot_versions prot)
 {
 	int rc;
 	struct qeth_cmd_buffer *iob;
@@ -3135,7 +3078,6 @@ int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
 	rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
 	return rc;
 }
-EXPORT_SYMBOL_GPL(qeth_query_ipassists);
 
 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
 				struct qeth_reply *reply, unsigned long data)
@@ -3174,7 +3116,6 @@ int qeth_query_switch_attributes(struct qeth_card *card,
 	return qeth_send_ipa_cmd(card, iob,
 				qeth_query_switch_attributes_cb, sw_info);
 }
-EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
 
 static int qeth_query_setdiagass_cb(struct qeth_card *card,
 		struct qeth_reply *reply, unsigned long data)
@@ -3524,13 +3465,14 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
 	qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
 	if (atomic_read(&queue->set_pci_flags_count))
 		qdio_flags |= QDIO_FLAG_PCI_OUT;
+	atomic_add(count, &queue->used_buffers);
+
 	rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
 		     queue->queue_no, index, count);
 	if (queue->card->options.performance_stats)
 		queue->card->perf_stats.outbound_do_qdio_time +=
 			qeth_get_micros() -
 			queue->card->perf_stats.outbound_do_qdio_start_time;
-	atomic_add(count, &queue->used_buffers);
 	if (rc) {
 		queue->card->stats.tx_errors += count;
 		/* ignore temporary SIGA errors without busy condition */
@@ -3595,7 +3537,7 @@ static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
 {
 	struct qeth_card *card = (struct qeth_card *)card_ptr;
 
-	if (card->dev && (card->dev->flags & IFF_UP))
+	if (card->dev->flags & IFF_UP)
 		napi_schedule(&card->napi);
 }
 
@@ -3628,10 +3570,10 @@ out:
 }
 EXPORT_SYMBOL_GPL(qeth_configure_cq);
 
-
-static void qeth_qdio_cq_handler(struct qeth_card *card,
-		unsigned int qdio_err,
-		unsigned int queue, int first_element, int count) {
+static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
+				 unsigned int queue, int first_element,
+				 int count)
+{
 	struct qeth_qdio_q *cq = card->qdio.c_q;
 	int i;
 	int rc;
@@ -3657,25 +3599,17 @@ static void qeth_qdio_cq_handler(struct qeth_card *card,
 	for (i = first_element; i < first_element + count; ++i) {
 		int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
 		struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
-		int e;
+		int e = 0;
 
-		e = 0;
 		while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
 		       buffer->element[e].addr) {
 			unsigned long phys_aob_addr;
 
 			phys_aob_addr = (unsigned long) buffer->element[e].addr;
 			qeth_qdio_handle_aob(card, phys_aob_addr);
-			buffer->element[e].addr = NULL;
-			buffer->element[e].eflags = 0;
-			buffer->element[e].sflags = 0;
-			buffer->element[e].length = 0;
-
 			++e;
 		}
-
-		buffer->element[15].eflags = 0;
-		buffer->element[15].sflags = 0;
+		qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
 	}
 	rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
 		    card->qdio.c_q->next_buf_to_init,
@@ -3754,11 +3688,11 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
 				qeth_notify_skbs(queue, buffer,
 						 TX_NOTIFY_PENDING);
 			}
-			buffer->aob = queue->bufstates[bidx].aob;
 			QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
-			QETH_CARD_TEXT(queue->card, 5, "aob");
-			QETH_CARD_TEXT_(queue->card, 5, "%lx",
-					virt_to_phys(buffer->aob));
+
+			/* prepare the queue slot for re-use: */
+			qeth_scrub_qdio_buffer(buffer->buffer,
+					       QETH_MAX_BUFFER_ELEMENTS(card));
 			if (qeth_init_qdio_out_buf(queue, bidx)) {
 				QETH_CARD_TEXT(card, 2, "outofbuf");
 				qeth_schedule_recovery(card);
@@ -3772,8 +3706,7 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
 				qeth_notify_skbs(queue, buffer, n);
 			}
 
-			qeth_clear_output_buffer(queue, buffer,
-						QETH_QDIO_BUF_EMPTY);
+			qeth_clear_output_buffer(queue, buffer);
 		}
 		qeth_cleanup_handled_pending(queue, bidx, 0);
 	}
@@ -3800,15 +3733,11 @@ static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
  * Note: Function assumes that we have 4 outbound queues.
  */
 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
-			int ipv, int cast_type)
+			    int ipv)
 {
 	__be16 *tci;
 	u8 tos;
 
-	if (cast_type && card->info.is_multicast_different)
-		return card->info.is_multicast_different &
-			(card->qdio.no_out_queues - 1);
-
 	switch (card->qdio.do_prio_queueing) {
 	case QETH_PRIO_Q_ING_TOS:
 	case QETH_PRIO_Q_ING_PREC:
@@ -3872,6 +3801,17 @@ int qeth_get_elements_for_frags(struct sk_buff *skb)
 }
 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
 
+static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)
+{
+	unsigned int elements = qeth_get_elements_for_frags(skb);
+	addr_t end = (addr_t)skb->data + skb_headlen(skb);
+	addr_t start = (addr_t)skb->data + data_offset;
+
+	if (start != end)
+		elements += qeth_get_elements_for_range(start, end);
+	return elements;
+}
+
 /**
  * qeth_get_elements_no() -	find number of SBALEs for skb data, inc. frags.
  * @card:			qeth card structure, to check max. elems.
@@ -3887,12 +3827,7 @@ EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
 int qeth_get_elements_no(struct qeth_card *card,
 		     struct sk_buff *skb, int extra_elems, int data_offset)
 {
-	addr_t end = (addr_t)skb->data + skb_headlen(skb);
-	int elements = qeth_get_elements_for_frags(skb);
-	addr_t start = (addr_t)skb->data + data_offset;
-
-	if (start != end)
-		elements += qeth_get_elements_for_range(start, end);
+	int elements = qeth_count_elements(skb, data_offset);
 
 	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
 		QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
@@ -3926,32 +3861,87 @@ int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
 
 /**
- * qeth_push_hdr() - push a qeth_hdr onto an skb.
- * @skb: skb that the qeth_hdr should be pushed onto.
+ * qeth_add_hw_header() - add a HW header to an skb.
+ * @skb: skb that the HW header should be added to.
  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
  *	 it contains a valid pointer to a qeth_hdr.
- * @len: length of the hdr that needs to be pushed on.
+ * @hdr_len: length of the HW header.
+ * @proto_len: length of protocol headers that need to be in same page as the
+ *	       HW header.
  *
  * Returns the pushed length. If the header can't be pushed on
  * (eg. because it would cross a page boundary), it is allocated from
  * the cache instead and 0 is returned.
+ * The number of needed buffer elements is returned in @elements.
  * Error to create the hdr is indicated by returning with < 0.
  */
-int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
-{
-	if (skb_headroom(skb) >= len &&
-	    qeth_get_elements_for_range((addr_t)skb->data - len,
-					(addr_t)skb->data) == 1) {
-		*hdr = skb_push(skb, len);
-		return len;
+int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
+		       struct qeth_hdr **hdr, unsigned int hdr_len,
+		       unsigned int proto_len, unsigned int *elements)
+{
+	const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
+	const unsigned int contiguous = proto_len ? proto_len : 1;
+	unsigned int __elements;
+	addr_t start, end;
+	bool push_ok;
+	int rc;
+
+check_layout:
+	start = (addr_t)skb->data - hdr_len;
+	end = (addr_t)skb->data;
+
+	if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
+		/* Push HW header into same page as first protocol header. */
+		push_ok = true;
+		__elements = qeth_count_elements(skb, 0);
+	} else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
+		/* Push HW header into a new page. */
+		push_ok = true;
+		__elements = 1 + qeth_count_elements(skb, 0);
+	} else {
+		/* Use header cache, copy protocol headers up. */
+		push_ok = false;
+		__elements = 1 + qeth_count_elements(skb, proto_len);
+	}
+
+	/* Compress skb to fit into one IO buffer: */
+	if (__elements > max_elements) {
+		if (!skb_is_nonlinear(skb)) {
+			/* Drop it, no easy way of shrinking it further. */
+			QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
+					 max_elements, __elements, skb->len);
+			return -E2BIG;
+		}
+
+		rc = skb_linearize(skb);
+		if (card->options.performance_stats) {
+			if (rc)
+				card->perf_stats.tx_linfail++;
+			else
+				card->perf_stats.tx_lin++;
+		}
+		if (rc)
+			return rc;
+
+		/* Linearization changed the layout, re-evaluate: */
+		goto check_layout;
+	}
+
+	*elements = __elements;
+	/* Add the header: */
+	if (push_ok) {
+		*hdr = skb_push(skb, hdr_len);
+		return hdr_len;
 	}
 	/* fall back */
 	*hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 	if (!*hdr)
 		return -ENOMEM;
+	/* Copy protocol headers behind HW header: */
+	skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(qeth_push_hdr);
+EXPORT_SYMBOL_GPL(qeth_add_hw_header);
 
 static void __qeth_fill_buffer(struct sk_buff *skb,
 			       struct qeth_qdio_out_buffer *buf,
@@ -4231,24 +4221,6 @@ void qeth_setadp_promisc_mode(struct qeth_card *card)
 }
 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
 
-int qeth_change_mtu(struct net_device *dev, int new_mtu)
-{
-	struct qeth_card *card;
-	char dbf_text[15];
-
-	card = dev->ml_priv;
-
-	QETH_CARD_TEXT(card, 4, "chgmtu");
-	sprintf(dbf_text, "%8x", new_mtu);
-	QETH_CARD_TEXT(card, 4, dbf_text);
-
-	if (!qeth_mtu_is_valid(card, new_mtu))
-		return -EINVAL;
-	dev->mtu = new_mtu;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(qeth_change_mtu);
-
 struct net_device_stats *qeth_get_stats(struct net_device *dev)
 {
 	struct qeth_card *card;
@@ -4824,9 +4796,6 @@ int qeth_vm_request_mac(struct qeth_card *card)
 
 	QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
 
-	if (!card->dev)
-		return -ENODEV;
-
 	request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
 	response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
 	if (!request || !response) {
@@ -4834,7 +4803,7 @@ int qeth_vm_request_mac(struct qeth_card *card)
 		goto out;
 	}
 
-	ccw_device_get_id(CARD_RDEV(card), &id);
+	ccw_device_get_id(CARD_DDEV(card), &id);
 	request->resp_buf_len = sizeof(*response);
 	request->resp_version = DIAG26C_VERSION2;
 	request->op_code = DIAG26C_GET_MAC;
@@ -5067,11 +5036,11 @@ out_free_nothing:
 
 static void qeth_core_free_card(struct qeth_card *card)
 {
-
 	QETH_DBF_TEXT(SETUP, 2, "freecrd");
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 	qeth_clean_channel(&card->read);
 	qeth_clean_channel(&card->write);
+	qeth_clean_channel(&card->data);
 	qeth_free_qdio_buffers(card);
 	unregister_service_level(&card->qeth_service_level);
 	kfree(card);
@@ -5706,6 +5675,53 @@ static void qeth_clear_dbf_list(void)
 	mutex_unlock(&qeth_dbf_list_mutex);
 }
 
+static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
+{
+	struct net_device *dev;
+
+	switch (card->info.type) {
+	case QETH_CARD_TYPE_IQD:
+		dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);
+		break;
+	case QETH_CARD_TYPE_OSN:
+		dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
+		break;
+	default:
+		dev = alloc_etherdev(0);
+	}
+
+	if (!dev)
+		return NULL;
+
+	dev->ml_priv = card;
+	dev->watchdog_timeo = QETH_TX_TIMEOUT;
+	dev->min_mtu = IS_OSN(card) ? 64 : 576;
+	 /* initialized when device first goes online: */
+	dev->max_mtu = 0;
+	dev->mtu = 0;
+	SET_NETDEV_DEV(dev, &card->gdev->dev);
+	netif_carrier_off(dev);
+
+	if (!IS_OSN(card)) {
+		dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+		dev->hw_features |= NETIF_F_SG;
+		dev->vlan_features |= NETIF_F_SG;
+	}
+
+	return dev;
+}
+
+struct net_device *qeth_clone_netdev(struct net_device *orig)
+{
+	struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
+
+	if (!clone)
+		return NULL;
+
+	clone->dev_port = orig->dev_port;
+	return clone;
+}
+
 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 {
 	struct qeth_card *card;
@@ -5748,12 +5764,12 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 	gdev->cdev[1]->handler = qeth_irq;
 	gdev->cdev[2]->handler = qeth_irq;
 
-	qeth_determine_card_type(card);
-	rc = qeth_setup_card(card);
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
+	qeth_setup_card(card);
+	qeth_update_from_chp_desc(card);
+
+	card->dev = qeth_alloc_netdev(card);
+	if (!card->dev)
 		goto err_card;
-	}
 
 	qeth_determine_capabilities(card);
 	enforced_disc = qeth_enforce_discipline(card);
@@ -5765,7 +5781,7 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 		card->info.layer_enforced = true;
 		rc = qeth_core_load_discipline(card, enforced_disc);
 		if (rc)
-			goto err_card;
+			goto err_load;
 
 		gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
 					? card->discipline->devtype
@@ -5783,6 +5799,8 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 
 err_disc:
 	qeth_core_free_discipline(card);
+err_load:
+	free_netdev(card->dev);
 err_card:
 	qeth_core_free_card(card);
 err_dev:
@@ -5805,10 +5823,10 @@ static void qeth_core_remove_device(struct ccwgroup_device *gdev)
 	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 	list_del(&card->list);
 	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
+	free_netdev(card->dev);
 	qeth_core_free_card(card);
 	dev_set_drvdata(&gdev->dev, NULL);
 	put_device(&gdev->dev);
-	return;
 }
 
 static int qeth_core_set_online(struct ccwgroup_device *gdev)
@@ -5877,31 +5895,13 @@ static int qeth_core_restore(struct ccwgroup_device *gdev)
 	return 0;
 }
 
-static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
-	.driver = {
-		.owner = THIS_MODULE,
-		.name = "qeth",
-	},
-	.ccw_driver = &qeth_ccw_driver,
-	.setup = qeth_core_probe_device,
-	.remove = qeth_core_remove_device,
-	.set_online = qeth_core_set_online,
-	.set_offline = qeth_core_set_offline,
-	.shutdown = qeth_core_shutdown,
-	.prepare = NULL,
-	.complete = NULL,
-	.freeze = qeth_core_freeze,
-	.thaw = qeth_core_thaw,
-	.restore = qeth_core_restore,
-};
-
 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
 			   size_t count)
 {
 	int err;
 
-	err = ccwgroup_create_dev(qeth_core_root_dev,
-				  &qeth_core_ccwgroup_driver, 3, buf);
+	err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
+				  buf);
 
 	return err ? err : count;
 }
@@ -5919,6 +5919,25 @@ static const struct attribute_group *qeth_drv_attr_groups[] = {
 	NULL,
 };
 
+static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
+	.driver = {
+		.groups = qeth_drv_attr_groups,
+		.owner = THIS_MODULE,
+		.name = "qeth",
+	},
+	.ccw_driver = &qeth_ccw_driver,
+	.setup = qeth_core_probe_device,
+	.remove = qeth_core_remove_device,
+	.set_online = qeth_core_set_online,
+	.set_offline = qeth_core_set_offline,
+	.shutdown = qeth_core_shutdown,
+	.prepare = NULL,
+	.complete = NULL,
+	.freeze = qeth_core_freeze,
+	.thaw = qeth_core_thaw,
+	.restore = qeth_core_restore,
+};
+
 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
 	struct qeth_card *card = dev->ml_priv;
@@ -5985,7 +6004,7 @@ static struct {
 	{"tx skbs packing"},
 	{"tx buffers packing"},
 	{"tx sg skbs"},
-	{"tx sg frags"},
+	{"tx buffer elements"},
 /* 10 */{"rx sg skbs"},
 	{"rx sg frags"},
 	{"rx sg page allocs"},
@@ -6044,7 +6063,7 @@ void qeth_core_get_ethtool_stats(struct net_device *dev,
 	data[6] = card->perf_stats.skbs_sent_pack;
 	data[7] = card->perf_stats.bufs_sent_pack;
 	data[8] = card->perf_stats.sg_skbs_sent;
-	data[9] = card->perf_stats.sg_frags_sent;
+	data[9] = card->perf_stats.buf_elements_sent;
 	data[10] = card->perf_stats.sg_skbs_rx;
 	data[11] = card->perf_stats.sg_frags_rx;
 	data[12] = card->perf_stats.sg_alloc_page_rx;
@@ -6459,28 +6478,27 @@ static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
 			  NETIF_F_IPV6_CSUM)
 /**
- * qeth_recover_features() - Restore device features after recovery
- * @dev:	the recovering net_device
- *
- * Caller must hold rtnl lock.
+ * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
+ * @dev:	a net_device
  */
-void qeth_recover_features(struct net_device *dev)
+void qeth_enable_hw_features(struct net_device *dev)
 {
-	netdev_features_t features = dev->features;
 	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.
 	 * netdev_update_features() will restart them.
 	 */
 	dev->features &= ~QETH_HW_FEATURES;
 	netdev_update_features(dev);
-
-	if (features == dev->features)
-		return;
-	dev_warn(&card->gdev->dev,
-		 "Device recovery failed to restore all offload features\n");
+	if (features != dev->features)
+		dev_warn(&card->gdev->dev,
+			 "Device recovery failed to restore all offload features\n");
+	rtnl_unlock();
 }
-EXPORT_SYMBOL_GPL(qeth_recover_features);
+EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
 
 int qeth_set_features(struct net_device *dev, netdev_features_t features)
 {
@@ -6611,7 +6629,6 @@ static int __init qeth_core_init(void)
 	rc = ccw_driver_register(&qeth_ccw_driver);
 	if (rc)
 		goto ccw_err;
-	qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
 	rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
 	if (rc)
 		goto ccwgroup_err;