1 files changed, 110 insertions, 269 deletions

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index ee8e3e7cad51..d8c1c3e735bb 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -181,16 +181,16 @@ static void ide_classify_atapi_dev(ide_drive_t *drive)
  *	do_identify	-	identify a drive
  *	@drive: drive to identify 
  *	@cmd: command used
+ *	@id: buffer for IDENTIFY data
  *
  *	Called when we have issued a drive identify command to
  *	read and parse the results. This function is run with
  *	interrupts disabled. 
  */
 
-static void do_identify(ide_drive_t *drive, u8 cmd)
+static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
 {
 	ide_hwif_t *hwif = drive->hwif;
-	u16 *id = drive->id;
 	char *m = (char *)&id[ATA_ID_PROD];
 	unsigned long flags;
 	int bswap = 1;
@@ -228,43 +228,25 @@ static void do_identify(ide_drive_t *drive, u8 cmd)
 	m[ATA_ID_PROD_LEN - 1] = '\0';
 
 	if (strstr(m, "E X A B Y T E N E S T"))
-		goto err_misc;
-
-	drive->dev_flags |= IDE_DFLAG_PRESENT;
-	drive->dev_flags &= ~IDE_DFLAG_DEAD;
-
-	/*
-	 * Check for an ATAPI device
-	 */
-	if (cmd == ATA_CMD_ID_ATAPI)
-		ide_classify_atapi_dev(drive);
+		drive->dev_flags &= ~IDE_DFLAG_PRESENT;
 	else
-	/*
-	 * Not an ATAPI device: looks like a "regular" hard disk
-	 */
-		ide_classify_ata_dev(drive);
-	return;
-err_misc:
-	kfree(id);
-	drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+		drive->dev_flags |= IDE_DFLAG_PRESENT;
 }
 
 /**
- *	actual_try_to_identify	-	send ata/atapi identify
+ *	ide_dev_read_id	-	send ATA/ATAPI IDENTIFY command
  *	@drive: drive to identify
  *	@cmd: command to use
+ *	@id: buffer for IDENTIFY data
  *
- *	try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
- *	and waits for a response.  It also monitors irqs while this is
- *	happening, in hope of automatically determining which one is
- *	being used by the interface.
+ *	Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
  *
  *	Returns:	0  device was identified
  *			1  device timed-out (no response to identify request)
  *			2  device aborted the command (refused to identify itself)
  */
 
-static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
+int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct ide_io_ports *io_ports = &hwif->io_ports;
@@ -273,6 +255,13 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 	unsigned long timeout;
 	u8 s = 0, a = 0;
 
+	/*
+	 * Disable device IRQ.  Otherwise we'll get spurious interrupts
+	 * during the identify phase that the IRQ handler isn't expecting.
+	 */
+	if (io_ports->ctl_addr)
+		tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
+
 	/* take a deep breath */
 	msleep(50);
 
@@ -294,13 +283,13 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 	 * identify command to be sure of reply
 	 */
 	if (cmd == ATA_CMD_ID_ATAPI) {
-		ide_task_t task;
+		struct ide_cmd cmd;
 
-		memset(&task, 0, sizeof(task));
+		memset(&cmd, 0, sizeof(cmd));
 		/* disable DMA & overlap */
-		task.tf_flags = IDE_TFLAG_OUT_FEATURE;
+		cmd.tf_flags = IDE_TFLAG_OUT_FEATURE;
 
-		tp_ops->tf_load(drive, &task);
+		tp_ops->tf_load(drive, &cmd);
 	}
 
 	/* ask drive for ID */
@@ -317,7 +306,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 
 	if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
 		/* drive returned ID */
-		do_identify(drive, cmd);
+		do_identify(drive, cmd, id);
 		/* drive responded with ID */
 		rc = 0;
 		/* clear drive IRQ */
@@ -329,63 +318,6 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 	return rc;
 }
 
-/**
- *	try_to_identify	-	try to identify a drive
- *	@drive: drive to probe
- *	@cmd: command to use
- *
- *	Issue the identify command and then do IRQ probing to
- *	complete the identification when needed by finding the
- *	IRQ the drive is attached to
- */
- 
-static int try_to_identify (ide_drive_t *drive, u8 cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
-	int retval;
-	int autoprobe = 0;
-	unsigned long cookie = 0;
-
-	/*
-	 * Disable device irq unless we need to
-	 * probe for it. Otherwise we'll get spurious
-	 * interrupts during the identify-phase that
-	 * the irq handler isn't expecting.
-	 */
-	if (hwif->io_ports.ctl_addr) {
-		if (!hwif->irq) {
-			autoprobe = 1;
-			cookie = probe_irq_on();
-		}
-		tp_ops->set_irq(hwif, autoprobe);
-	}
-
-	retval = actual_try_to_identify(drive, cmd);
-
-	if (autoprobe) {
-		int irq;
-
-		tp_ops->set_irq(hwif, 0);
-		/* clear drive IRQ */
-		(void)tp_ops->read_status(hwif);
-		udelay(5);
-		irq = probe_irq_off(cookie);
-		if (!hwif->irq) {
-			if (irq > 0) {
-				hwif->irq = irq;
-			} else {
-				/* Mmmm.. multiple IRQs..
-				 * don't know which was ours
-				 */
-				printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n",
-					drive->name, cookie);
-			}
-		}
-	}
-	return retval;
-}
-
 int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
 {
 	u8 stat;
@@ -405,14 +337,14 @@ int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
 
 static u8 ide_read_device(ide_drive_t *drive)
 {
-	ide_task_t task;
+	struct ide_cmd cmd;
 
-	memset(&task, 0, sizeof(task));
-	task.tf_flags = IDE_TFLAG_IN_DEVICE;
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf_flags = IDE_TFLAG_IN_DEVICE;
 
-	drive->hwif->tp_ops->tf_read(drive, &task);
+	drive->hwif->tp_ops->tf_read(drive, &cmd);
 
-	return task.tf.device;
+	return cmd.tf.device;
 }
 
 /**
@@ -440,6 +372,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	u16 *id = drive->id;
 	int rc;
 	u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
 
@@ -457,13 +390,13 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 	 * (e.g. crw9624 as drive0 with disk as slave)
 	 */
 	msleep(50);
-	SELECT_DRIVE(drive);
+	tp_ops->dev_select(drive);
 	msleep(50);
 
 	if (ide_read_device(drive) != drive->select && present == 0) {
 		if (drive->dn & 1) {
 			/* exit with drive0 selected */
-			SELECT_DRIVE(hwif->devices[0]);
+			tp_ops->dev_select(hwif->devices[0]);
 			/* allow ATA_BUSY to assert & clear */
 			msleep(50);
 		}
@@ -475,11 +408,10 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 
 	if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
 	    present || cmd == ATA_CMD_ID_ATAPI) {
-		/* send cmd and wait */
-		if ((rc = try_to_identify(drive, cmd))) {
+		rc = ide_dev_read_id(drive, cmd, id);
+		if (rc)
 			/* failed: try again */
-			rc = try_to_identify(drive,cmd);
-		}
+			rc = ide_dev_read_id(drive, cmd, id);
 
 		stat = tp_ops->read_status(hwif);
 
@@ -490,11 +422,11 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 			printk(KERN_ERR "%s: no response (status = 0x%02x), "
 					"resetting drive\n", drive->name, stat);
 			msleep(50);
-			SELECT_DRIVE(drive);
+			tp_ops->dev_select(drive);
 			msleep(50);
 			tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
 			(void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0);
-			rc = try_to_identify(drive, cmd);
+			rc = ide_dev_read_id(drive, cmd, id);
 		}
 
 		/* ensure drive IRQ is clear */
@@ -509,7 +441,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 	}
 	if (drive->dn & 1) {
 		/* exit with drive0 selected */
-		SELECT_DRIVE(hwif->devices[0]);
+		tp_ops->dev_select(hwif->devices[0]);
 		msleep(50);
 		/* ensure drive irq is clear */
 		(void)tp_ops->read_status(hwif);
@@ -517,37 +449,6 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 	return rc;
 }
 
-/*
- *
- */
-static void enable_nest (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
-	u8 stat;
-
-	printk(KERN_INFO "%s: enabling %s -- ",
-		hwif->name, (char *)&drive->id[ATA_ID_PROD]);
-
-	SELECT_DRIVE(drive);
-	msleep(50);
-	tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST);
-
-	if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) {
-		printk(KERN_CONT "failed (timeout)\n");
-		return;
-	}
-
-	msleep(50);
-
-	stat = tp_ops->read_status(hwif);
-
-	if (!OK_STAT(stat, 0, BAD_STAT))
-		printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
-	else
-		printk(KERN_CONT "success\n");
-}
-
 /**
  *	probe_for_drives	-	upper level drive probe
  *	@drive: drive to probe for
@@ -563,6 +464,8 @@ static void enable_nest (ide_drive_t *drive)
 static u8 probe_for_drive(ide_drive_t *drive)
 {
 	char *m;
+	int rc;
+	u8 cmd;
 
 	/*
 	 *	In order to keep things simple we have an id
@@ -586,20 +489,17 @@ static u8 probe_for_drive(ide_drive_t *drive)
 
 	/* skip probing? */
 	if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
-retry:
 		/* if !(success||timed-out) */
-		if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
+		cmd = ATA_CMD_ID_ATA;
+		rc = do_probe(drive, cmd);
+		if (rc >= 2) {
 			/* look for ATAPI device */
-			(void)do_probe(drive, ATA_CMD_ID_ATAPI);
+			cmd = ATA_CMD_ID_ATAPI;
+			rc = do_probe(drive, cmd);
+		}
 
 		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-			/* drive not found */
-			return 0;
-
-		if (strstr(m, "E X A B Y T E N E S T")) {
-			enable_nest(drive);
-			goto retry;
-		}
+			goto out_free;
 
 		/* identification failed? */
 		if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
@@ -614,12 +514,16 @@ retry:
 				printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
 				drive->dev_flags &= ~IDE_DFLAG_PRESENT;
 			}
+		} else {
+			if (cmd == ATA_CMD_ID_ATAPI)
+				ide_classify_atapi_dev(drive);
+			else
+				ide_classify_ata_dev(drive);
 		}
-		/* drive was found */
 	}
 
 	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-		return 0;
+		goto out_free;
 
 	/* The drive wasn't being helpful. Add generic info only */
 	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
@@ -632,7 +536,10 @@ retry:
 		ide_disk_init_mult_count(drive);
 	}
 
-	return !!(drive->dev_flags & IDE_DFLAG_PRESENT);
+	return 1;
+out_free:
+	kfree(drive->id);
+	return 0;
 }
 
 static void hwif_release_dev(struct device *dev)
@@ -698,6 +605,7 @@ out:
 
 static int ide_port_wait_ready(ide_hwif_t *hwif)
 {
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 	ide_drive_t *drive;
 	int i, rc;
 
@@ -720,8 +628,8 @@ static int ide_port_wait_ready(ide_hwif_t *hwif)
 		/* Ignore disks that we will not probe for later. */
 		if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
 		    (drive->dev_flags & IDE_DFLAG_PRESENT)) {
-			SELECT_DRIVE(drive);
-			hwif->tp_ops->set_irq(hwif, 1);
+			tp_ops->dev_select(drive);
+			tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 			mdelay(2);
 			rc = ide_wait_not_busy(hwif, 35000);
 			if (rc)
@@ -733,7 +641,7 @@ static int ide_port_wait_ready(ide_hwif_t *hwif)
 out:
 	/* Exit function with master reselected (let's be sane) */
 	if (i)
-		SELECT_DRIVE(hwif->devices[0]);
+		tp_ops->dev_select(hwif->devices[0]);
 
 	return rc;
 }
@@ -779,7 +687,6 @@ EXPORT_SYMBOL_GPL(ide_undecoded_slave);
 static int ide_probe_port(ide_hwif_t *hwif)
 {
 	ide_drive_t *drive;
-	unsigned long flags;
 	unsigned int irqd;
 	int i, rc = -ENODEV;
 
@@ -797,9 +704,6 @@ static int ide_probe_port(ide_hwif_t *hwif)
 	if (irqd)
 		disable_irq(hwif->irq);
 
-	local_save_flags(flags);
-	local_irq_enable_in_hardirq();
-
 	if (ide_port_wait_ready(hwif) == -EBUSY)
 		printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
 
@@ -813,8 +717,6 @@ static int ide_probe_port(ide_hwif_t *hwif)
 			rc = 0;
 	}
 
-	local_irq_restore(flags);
-
 	/*
 	 * Use cached IRQ number. It might be (and is...) changed by probe
 	 * code above
@@ -831,29 +733,18 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
 	ide_drive_t *drive;
 	int i;
 
-	ide_port_for_each_dev(i, drive, hwif) {
-		if (drive->dev_flags & IDE_DFLAG_PRESENT) {
-			if (port_ops && port_ops->quirkproc)
-				port_ops->quirkproc(drive);
-		}
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		if (port_ops && port_ops->quirkproc)
+			port_ops->quirkproc(drive);
 	}
 
-	ide_port_for_each_dev(i, drive, hwif) {
-		if (drive->dev_flags & IDE_DFLAG_PRESENT) {
-			ide_set_max_pio(drive);
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		ide_set_max_pio(drive);
 
-			drive->dev_flags |= IDE_DFLAG_NICE1;
+		drive->dev_flags |= IDE_DFLAG_NICE1;
 
-			if (hwif->dma_ops)
-				ide_set_dma(drive);
-		}
-	}
-
-	ide_port_for_each_dev(i, drive, hwif) {
-		if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
-			drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
-		else
-			drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
+		if (hwif->dma_ops)
+			ide_set_dma(drive);
 	}
 }
 
@@ -924,10 +815,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
 	int i, j = 0;
 
 	mutex_lock(&ide_cfg_mtx);
-	ide_port_for_each_dev(i, drive, hwif) {
-		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-			continue;
-
+	ide_port_for_each_present_dev(i, drive, hwif) {
 		if (ide_init_queue(drive)) {
 			printk(KERN_ERR "ide: failed to init %s\n",
 					drive->name);
@@ -950,41 +838,19 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
 static int init_irq (ide_hwif_t *hwif)
 {
 	struct ide_io_ports *io_ports = &hwif->io_ports;
-	irq_handler_t irq_handler;
-	int sa = 0;
-
-	mutex_lock(&ide_cfg_mtx);
-	spin_lock_init(&hwif->lock);
-
-	init_timer(&hwif->timer);
-	hwif->timer.function = &ide_timer_expiry;
-	hwif->timer.data = (unsigned long)hwif;
+	struct ide_host *host = hwif->host;
+	irq_handler_t irq_handler = host->irq_handler;
+	int sa = host->irq_flags;
 
-	irq_handler = hwif->host->irq_handler;
 	if (irq_handler == NULL)
 		irq_handler = ide_intr;
 
-#if defined(__mc68000__)
-	sa = IRQF_SHARED;
-#endif /* __mc68000__ */
-
-	if (hwif->chipset == ide_pci)
-		sa = IRQF_SHARED;
-
 	if (io_ports->ctl_addr)
-		hwif->tp_ops->set_irq(hwif, 1);
+		hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 
 	if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
 		goto out_up;
 
-	if (!hwif->rqsize) {
-		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
-		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
-			hwif->rqsize = 256;
-		else
-			hwif->rqsize = 65536;
-	}
-
 #if !defined(__mc68000__)
 	printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
 		io_ports->data_addr, io_ports->status_addr,
@@ -997,10 +863,8 @@ static int init_irq (ide_hwif_t *hwif)
 		printk(KERN_CONT " (serialized)");
 	printk(KERN_CONT "\n");
 
-	mutex_unlock(&ide_cfg_mtx);
 	return 0;
 out_up:
-	mutex_unlock(&ide_cfg_mtx);
 	return 1;
 }
 
@@ -1079,34 +943,25 @@ EXPORT_SYMBOL_GPL(ide_init_disk);
 static void drive_release_dev (struct device *dev)
 {
 	ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
-	ide_hwif_t *hwif = drive->hwif;
 
 	ide_proc_unregister_device(drive);
 
-	spin_lock_irq(&hwif->lock);
+	blk_cleanup_queue(drive->queue);
+	drive->queue = NULL;
+
 	kfree(drive->id);
 	drive->id = NULL;
+
 	drive->dev_flags &= ~IDE_DFLAG_PRESENT;
-	/* Messed up locking ... */
-	spin_unlock_irq(&hwif->lock);
-	blk_cleanup_queue(drive->queue);
-	spin_lock_irq(&hwif->lock);
-	drive->queue = NULL;
-	spin_unlock_irq(&hwif->lock);
 
 	complete(&drive->gendev_rel_comp);
 }
 
 static int hwif_init(ide_hwif_t *hwif)
 {
-	int old_irq;
-
 	if (!hwif->irq) {
-		hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
-		if (!hwif->irq) {
-			printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
-			return 0;
-		}
+		printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
+		return 0;
 	}
 
 	if (register_blkdev(hwif->major, hwif->name))
@@ -1124,29 +979,12 @@ static int hwif_init(ide_hwif_t *hwif)
 
 	sg_init_table(hwif->sg_table, hwif->sg_max_nents);
 	
-	if (init_irq(hwif) == 0)
-		goto done;
-
-	old_irq = hwif->irq;
-	/*
-	 *	It failed to initialise. Find the default IRQ for 
-	 *	this port and try that.
-	 */
-	hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
-	if (!hwif->irq) {
-		printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
-			hwif->name, old_irq);
-		goto out;
-	}
 	if (init_irq(hwif)) {
-		printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n",
-			hwif->name, old_irq, hwif->irq);
+		printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
+			hwif->name, hwif->irq);
 		goto out;
 	}
-	printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n",
-		hwif->name, hwif->irq);
 
-done:
 	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
 			    THIS_MODULE, ata_probe, ata_lock, hwif);
 	return 1;
@@ -1161,13 +999,10 @@ static void hwif_register_devices(ide_hwif_t *hwif)
 	ide_drive_t *drive;
 	unsigned int i;
 
-	ide_port_for_each_dev(i, drive, hwif) {
+	ide_port_for_each_present_dev(i, drive, hwif) {
 		struct device *dev = &drive->gendev;
 		int ret;
 
-		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-			continue;
-
 		dev_set_name(dev, "%u.%u", hwif->index, i);
 		dev->parent = &hwif->gendev;
 		dev->bus = &ide_bus_type;
@@ -1192,6 +1027,8 @@ static void ide_port_init_devices(ide_hwif_t *hwif)
 
 		if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
 			drive->io_32bit = 1;
+		if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
+			drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
 		if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
 			drive->dev_flags |= IDE_DFLAG_UNMASK;
 		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
@@ -1213,10 +1050,6 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
 	if (d->init_iops)
 		d->init_iops(hwif);
 
-	if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
-	    (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
-		hwif->irq = port ? 15 : 14;
-
 	/* ->host_flags may be set by ->init_iops (or even earlier...) */
 	hwif->host_flags |= d->host_flags;
 	hwif->pio_mask = d->pio_mask;
@@ -1225,7 +1058,7 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
 		hwif->tp_ops = d->tp_ops;
 
 	/* ->set_pio_mode for DTC2278 is currently limited to port 0 */
-	if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
+	if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
 		hwif->port_ops = d->port_ops;
 
 	hwif->swdma_mask = d->swdma_mask;
@@ -1259,6 +1092,13 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
 
 	if (d->max_sectors)
 		hwif->rqsize = d->max_sectors;
+	else {
+		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
+			hwif->rqsize = 256;
+		else
+			hwif->rqsize = 65536;
+	}
 
 	/* call chipset specific routine for each enabled port */
 	if (d->init_hwif)
@@ -1317,6 +1157,12 @@ static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 	hwif->name[2]	= 'e';
 	hwif->name[3]	= '0' + index;
 
+	spin_lock_init(&hwif->lock);
+
+	init_timer(&hwif->timer);
+	hwif->timer.function = &ide_timer_expiry;
+	hwif->timer.data = (unsigned long)hwif;
+
 	init_completion(&hwif->gendev_rel_comp);
 
 	hwif->tp_ops = &default_tp_ops;
@@ -1465,6 +1311,8 @@ struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
 
 	if (d) {
 		host->init_chipset = d->init_chipset;
+		host->get_lock     = d->get_lock;
+		host->release_lock = d->release_lock;
 		host->host_flags = d->host_flags;
 	}
 
@@ -1511,20 +1359,15 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
 		ide_init_port_hw(hwif, hws[i]);
 		ide_port_apply_params(hwif);
 
-		if (d == NULL) {
-			mate = NULL;
-		} else {
-			if ((i & 1) && mate) {
-				hwif->mate = mate;
-				mate->mate = hwif;
-			}
-
-			mate = (i & 1) ? NULL : hwif;
-
-			ide_init_port(hwif, i & 1, d);
-			ide_port_cable_detect(hwif);
+		if ((i & 1) && mate) {
+			hwif->mate = mate;
+			mate->mate = hwif;
 		}
 
+		mate = (i & 1) ? NULL : hwif;
+
+		ide_init_port(hwif, i & 1, d);
+		ide_port_cable_detect(hwif);
 		ide_port_init_devices(hwif);
 	}
 
@@ -1535,8 +1378,8 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
 		if (ide_probe_port(hwif) == 0)
 			hwif->present = 1;
 
-		if (hwif->chipset != ide_4drives || !hwif->mate ||
-		    !hwif->mate->present) {
+		if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
+		    hwif->mate == NULL || hwif->mate->present == 0) {
 			if (ide_register_port(hwif)) {
 				ide_disable_port(hwif);
 				continue;
@@ -1567,7 +1410,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
 
 		j++;
 
-		ide_acpi_init(hwif);
+		ide_acpi_init_port(hwif);
 
 		if (hwif->present)
 			ide_acpi_port_init_devices(hwif);
@@ -1624,11 +1467,9 @@ static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 	ide_drive_t *drive;
 	int i;
 
-	ide_port_for_each_dev(i, drive, hwif) {
-		if (drive->dev_flags & IDE_DFLAG_PRESENT) {
-			device_unregister(&drive->gendev);
-			wait_for_completion(&drive->gendev_rel_comp);
-		}
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		device_unregister(&drive->gendev);
+		wait_for_completion(&drive->gendev_rel_comp);
 	}
 }