ide: remove the legacy ide driver

The legay ide driver has been replace with libata starting in 2003 and has
been scheduled for removal for a while.  Finally kill it off so that we
can start cleaning up various bits of cruft it forced on the block layer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 1623 deletions

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
deleted file mode 100644
index aefd74c0d862..000000000000
--- a/drivers/ide/ide-probe.c
+++ /dev/null
@@ -1,1623 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  Copyright (C) 1994-1998   Linus Torvalds & authors (see below)
- *  Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
- */
-
-/*
- *  Mostly written by Mark Lord <mlord@pobox.com>
- *                and Gadi Oxman <gadio@netvision.net.il>
- *                and Andre Hedrick <andre@linux-ide.org>
- *
- *  See linux/MAINTAINERS for address of current maintainer.
- *
- * This is the IDE probe module, as evolved from hd.c and ide.c.
- *
- * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
- *	 by Andrea Arcangeli
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/errno.h>
-#include <linux/genhd.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/ide.h>
-#include <linux/spinlock.h>
-#include <linux/kmod.h>
-#include <linux/pci.h>
-#include <linux/scatterlist.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <linux/uaccess.h>
-#include <asm/io.h>
-
-/**
- *	generic_id		-	add a generic drive id
- *	@drive:	drive to make an ID block for
- *	
- *	Add a fake id field to the drive we are passed. This allows
- *	use to skip a ton of NULL checks (which people always miss) 
- *	and make drive properties unconditional outside of this file
- */
- 
-static void generic_id(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-
-	id[ATA_ID_CUR_CYLS]	= id[ATA_ID_CYLS]	= drive->cyl;
-	id[ATA_ID_CUR_HEADS]	= id[ATA_ID_HEADS]	= drive->head;
-	id[ATA_ID_CUR_SECTORS]	= id[ATA_ID_SECTORS]	= drive->sect;
-}
-
-static void ide_disk_init_chs(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-
-	/* Extract geometry if we did not already have one for the drive */
-	if (!drive->cyl || !drive->head || !drive->sect) {
-		drive->cyl  = drive->bios_cyl  = id[ATA_ID_CYLS];
-		drive->head = drive->bios_head = id[ATA_ID_HEADS];
-		drive->sect = drive->bios_sect = id[ATA_ID_SECTORS];
-	}
-
-	/* Handle logical geometry translation by the drive */
-	if (ata_id_current_chs_valid(id)) {
-		drive->cyl  = id[ATA_ID_CUR_CYLS];
-		drive->head = id[ATA_ID_CUR_HEADS];
-		drive->sect = id[ATA_ID_CUR_SECTORS];
-	}
-
-	/* Use physical geometry if what we have still makes no sense */
-	if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
-		drive->cyl  = id[ATA_ID_CYLS];
-		drive->head = id[ATA_ID_HEADS];
-		drive->sect = id[ATA_ID_SECTORS];
-	}
-}
-
-static void ide_disk_init_mult_count(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-	u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
-
-	if (max_multsect) {
-		if ((max_multsect / 2) > 1)
-			id[ATA_ID_MULTSECT] = max_multsect | 0x100;
-		else
-			id[ATA_ID_MULTSECT] &= ~0x1ff;
-
-		drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
-
-		if (drive->mult_req)
-			drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
-	}
-}
-
-static void ide_classify_ata_dev(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-	char *m = (char *)&id[ATA_ID_PROD];
-	int is_cfa = ata_id_is_cfa(id);
-
-	/* CF devices are *not* removable in Linux definition of the term */
-	if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
-		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
-
-	drive->media = ide_disk;
-
-	if (!ata_id_has_unload(drive->id))
-		drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
-
-	printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
-		is_cfa ? "CFA" : "ATA");
-}
-
-static void ide_classify_atapi_dev(ide_drive_t *drive)
-{
-	u16 *id = drive->id;
-	char *m = (char *)&id[ATA_ID_PROD];
-	u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
-
-	printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
-	switch (type) {
-	case ide_floppy:
-		if (!strstr(m, "CD-ROM")) {
-			if (!strstr(m, "oppy") &&
-			    !strstr(m, "poyp") &&
-			    !strstr(m, "ZIP"))
-				printk(KERN_CONT "cdrom or floppy?, assuming ");
-			if (drive->media != ide_cdrom) {
-				printk(KERN_CONT "FLOPPY");
-				drive->dev_flags |= IDE_DFLAG_REMOVABLE;
-				break;
-			}
-		}
-		/* Early cdrom models used zero */
-		type = ide_cdrom;
-		fallthrough;
-	case ide_cdrom:
-		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
-#ifdef CONFIG_PPC
-		/* kludge for Apple PowerBook internal zip */
-		if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
-			printk(KERN_CONT "FLOPPY");
-			type = ide_floppy;
-			break;
-		}
-#endif
-		printk(KERN_CONT "CD/DVD-ROM");
-		break;
-	case ide_tape:
-		printk(KERN_CONT "TAPE");
-		break;
-	case ide_optical:
-		printk(KERN_CONT "OPTICAL");
-		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
-		break;
-	default:
-		printk(KERN_CONT "UNKNOWN (type %d)", type);
-		break;
-	}
-
-	printk(KERN_CONT " drive\n");
-	drive->media = type;
-	/* an ATAPI device ignores DRDY */
-	drive->ready_stat = 0;
-	if (ata_id_cdb_intr(id))
-		drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
-	drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
-	/* we don't do head unloading on ATAPI devices */
-	drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
-}
-
-/**
- *	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, u16 *id)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	char *m = (char *)&id[ATA_ID_PROD];
-	unsigned long flags;
-	int bswap = 1;
-
-	/* local CPU only; some systems need this */
-	local_irq_save(flags);
-	/* read 512 bytes of id info */
-	hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
-	local_irq_restore(flags);
-
-	drive->dev_flags |= IDE_DFLAG_ID_READ;
-#ifdef DEBUG
-	printk(KERN_INFO "%s: dumping identify data\n", drive->name);
-	ide_dump_identify((u8 *)id);
-#endif
-	ide_fix_driveid(id);
-
-	/*
-	 *  ATA_CMD_ID_ATA returns little-endian info,
-	 *  ATA_CMD_ID_ATAPI *usually* returns little-endian info.
-	 */
-	if (cmd == ATA_CMD_ID_ATAPI) {
-		if ((m[0] == 'N' && m[1] == 'E') ||  /* NEC */
-		    (m[0] == 'F' && m[1] == 'X') ||  /* Mitsumi */
-		    (m[0] == 'P' && m[1] == 'i'))    /* Pioneer */
-			/* Vertos drives may still be weird */
-			bswap ^= 1;
-	}
-
-	ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
-	ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
-	ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
-
-	/* we depend on this a lot! */
-	m[ATA_ID_PROD_LEN - 1] = '\0';
-
-	if (strstr(m, "E X A B Y T E N E S T"))
-		drive->dev_flags &= ~IDE_DFLAG_PRESENT;
-	else
-		drive->dev_flags |= IDE_DFLAG_PRESENT;
-}
-
-/**
- *	ide_dev_read_id	-	send ATA/ATAPI IDENTIFY command
- *	@drive: drive to identify
- *	@cmd: command to use
- *	@id: buffer for IDENTIFY data
- *	@irq_ctx: flag set when called from the IRQ context
- *
- *	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)
- */
-
-int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	struct ide_io_ports *io_ports = &hwif->io_ports;
-	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
-	int use_altstatus = 0, rc;
-	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 */
-	if (irq_ctx)
-		mdelay(50);
-	else
-		msleep(50);
-
-	if (io_ports->ctl_addr &&
-	    (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
-		a = tp_ops->read_altstatus(hwif);
-		s = tp_ops->read_status(hwif);
-		if ((a ^ s) & ~ATA_SENSE)
-			/* ancient Seagate drives, broken interfaces */
-			printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
-					 "instead of ALTSTATUS(0x%02x)\n",
-					 drive->name, s, a);
-		else
-			/* use non-intrusive polling */
-			use_altstatus = 1;
-	}
-
-	/* set features register for atapi
-	 * identify command to be sure of reply
-	 */
-	if (cmd == ATA_CMD_ID_ATAPI) {
-		struct ide_taskfile tf;
-
-		memset(&tf, 0, sizeof(tf));
-		/* disable DMA & overlap */
-		tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
-	}
-
-	/* ask drive for ID */
-	tp_ops->exec_command(hwif, cmd);
-
-	timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
-
-	/* wait for IRQ and ATA_DRQ */
-	if (irq_ctx) {
-		rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
-		if (rc)
-			return 1;
-	} else {
-		rc = ide_busy_sleep(drive, timeout, use_altstatus);
-		if (rc)
-			return 1;
-
-		msleep(50);
-		s = tp_ops->read_status(hwif);
-	}
-
-	if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
-		/* drive returned ID */
-		do_identify(drive, cmd, id);
-		/* drive responded with ID */
-		rc = 0;
-		/* clear drive IRQ */
-		(void)tp_ops->read_status(hwif);
-	} else {
-		/* drive refused ID */
-		rc = 2;
-	}
-	return rc;
-}
-
-int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 stat;
-
-	timeout += jiffies;
-
-	do {
-		msleep(50);	/* give drive a breather */
-		stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
-				 : hwif->tp_ops->read_status(hwif);
-		if ((stat & ATA_BUSY) == 0)
-			return 0;
-	} while (time_before(jiffies, timeout));
-
-	printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
-
-	return 1;	/* drive timed-out */
-}
-
-static u8 ide_read_device(ide_drive_t *drive)
-{
-	struct ide_taskfile tf;
-
-	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
-
-	return tf.device;
-}
-
-/**
- *	do_probe		-	probe an IDE device
- *	@drive: drive to probe
- *	@cmd: command to use
- *
- *	do_probe() has the difficult job of finding a drive if it exists,
- *	without getting hung up if it doesn't exist, without trampling on
- *	ethernet cards, and without leaving any IRQs dangling to haunt us later.
- *
- *	If a drive is "known" to exist (from CMOS or kernel parameters),
- *	but does not respond right away, the probe will "hang in there"
- *	for the maximum wait time (about 30 seconds), otherwise it will
- *	exit much more quickly.
- *
- * Returns:	0  device was identified
- *		1  device timed-out (no response to identify request)
- *		2  device aborted the command (refused to identify itself)
- *		3  bad status from device (possible for ATAPI drives)
- *		4  probe was not attempted because failure was obvious
- */
-
-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;
-
-	/* avoid waiting for inappropriate probes */
-	if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
-		return 4;
-
-#ifdef DEBUG
-	printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
-		drive->name, present, drive->media,
-		(cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
-#endif
-
-	/* needed for some systems
-	 * (e.g. crw9624 as drive0 with disk as slave)
-	 */
-	msleep(50);
-	tp_ops->dev_select(drive);
-	msleep(50);
-
-	if (ide_read_device(drive) != drive->select && present == 0) {
-		if (drive->dn & 1) {
-			/* exit with drive0 selected */
-			tp_ops->dev_select(hwif->devices[0]);
-			/* allow ATA_BUSY to assert & clear */
-			msleep(50);
-		}
-		/* no i/f present: mmm.. this should be a 4 -ml */
-		return 3;
-	}
-
-	stat = tp_ops->read_status(hwif);
-
-	if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
-	    present || cmd == ATA_CMD_ID_ATAPI) {
-		rc = ide_dev_read_id(drive, cmd, id, 0);
-		if (rc)
-			/* failed: try again */
-			rc = ide_dev_read_id(drive, cmd, id, 0);
-
-		stat = tp_ops->read_status(hwif);
-
-		if (stat == (ATA_BUSY | ATA_DRDY))
-			return 4;
-
-		if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
-			printk(KERN_ERR "%s: no response (status = 0x%02x), "
-					"resetting drive\n", drive->name, stat);
-			msleep(50);
-			tp_ops->dev_select(drive);
-			msleep(50);
-			tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
-			(void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
-			rc = ide_dev_read_id(drive, cmd, id, 0);
-		}
-
-		/* ensure drive IRQ is clear */
-		stat = tp_ops->read_status(hwif);
-
-		if (rc == 1)
-			printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
-					drive->name, stat);
-	} else {
-		/* not present or maybe ATAPI */
-		rc = 3;
-	}
-	if (drive->dn & 1) {
-		/* exit with drive0 selected */
-		tp_ops->dev_select(hwif->devices[0]);
-		msleep(50);
-		/* ensure drive irq is clear */
-		(void)tp_ops->read_status(hwif);
-	}
-	return rc;
-}
-
-/**
- *	probe_for_drives	-	upper level drive probe
- *	@drive: drive to probe for
- *
- *	probe_for_drive() tests for existence of a given drive using do_probe()
- *	and presents things to the user as needed.
- *
- *	Returns:	0  no device was found
- *			1  device was found
- *			   (note: IDE_DFLAG_PRESENT might still be not set)
- */
-
-static u8 probe_for_drive(ide_drive_t *drive)
-{
-	char *m;
-	int rc;
-	u8 cmd;
-
-	drive->dev_flags &= ~IDE_DFLAG_ID_READ;
-
-	m = (char *)&drive->id[ATA_ID_PROD];
-	strcpy(m, "UNKNOWN");
-
-	/* skip probing? */
-	if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
-		/* if !(success||timed-out) */
-		cmd = ATA_CMD_ID_ATA;
-		rc = do_probe(drive, cmd);
-		if (rc >= 2) {
-			/* look for ATAPI device */
-			cmd = ATA_CMD_ID_ATAPI;
-			rc = do_probe(drive, cmd);
-		}
-
-		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-			return 0;
-
-		/* identification failed? */
-		if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
-			if (drive->media == ide_disk) {
-				printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
-					drive->name, drive->cyl,
-					drive->head, drive->sect);
-			} else if (drive->media == ide_cdrom) {
-				printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
-			} else {
-				/* nuke it */
-				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);
-		}
-	}
-
-	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-		return 0;
-
-	/* The drive wasn't being helpful. Add generic info only */
-	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
-		generic_id(drive);
-		return 1;
-	}
-
-	if (drive->media == ide_disk) {
-		ide_disk_init_chs(drive);
-		ide_disk_init_mult_count(drive);
-	}
-
-	return 1;
-}
-
-static void hwif_release_dev(struct device *dev)
-{
-	ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
-
-	complete(&hwif->gendev_rel_comp);
-}
-
-static int ide_register_port(ide_hwif_t *hwif)
-{
-	int ret;
-
-	/* register with global device tree */
-	dev_set_name(&hwif->gendev, "%s", hwif->name);
-	dev_set_drvdata(&hwif->gendev, hwif);
-	if (hwif->gendev.parent == NULL)
-		hwif->gendev.parent = hwif->dev;
-	hwif->gendev.release = hwif_release_dev;
-
-	ret = device_register(&hwif->gendev);
-	if (ret < 0) {
-		printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
-			__func__, ret);
-		goto out;
-	}
-
-	hwif->portdev = device_create(ide_port_class, &hwif->gendev,
-				      MKDEV(0, 0), hwif, "%s", hwif->name);
-	if (IS_ERR(hwif->portdev)) {
-		ret = PTR_ERR(hwif->portdev);
-		device_unregister(&hwif->gendev);
-	}
-out:
-	return ret;
-}
-
-/**
- *	ide_port_wait_ready	-	wait for port to become ready
- *	@hwif: IDE port
- *
- *	This is needed on some PPCs and a bunch of BIOS-less embedded
- *	platforms.  Typical cases are:
- *
- *	- The firmware hard reset the disk before booting the kernel,
- *	  the drive is still doing it's poweron-reset sequence, that
- *	  can take up to 30 seconds.
- *
- *	- The firmware does nothing (or no firmware), the device is
- *	  still in POST state (same as above actually).
- *
- *	- Some CD/DVD/Writer combo drives tend to drive the bus during
- *	  their reset sequence even when they are non-selected slave
- *	  devices, thus preventing discovery of the main HD.
- *
- *	Doing this wait-for-non-busy should not harm any existing
- *	configuration and fix some issues like the above.
- *
- *	BenH.
- *
- *	Returns 0 on success, error code (< 0) otherwise.
- */
-
-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;
-
-	printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
-
-	/* Let HW settle down a bit from whatever init state we
-	 * come from */
-	mdelay(2);
-
-	/* Wait for BSY bit to go away, spec timeout is 30 seconds,
-	 * I know of at least one disk who takes 31 seconds, I use 35
-	 * here to be safe
-	 */
-	rc = ide_wait_not_busy(hwif, 35000);
-	if (rc)
-		return rc;
-
-	/* Now make sure both master & slave are ready */
-	ide_port_for_each_dev(i, drive, hwif) {
-		/* Ignore disks that we will not probe for later. */
-		if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
-		    (drive->dev_flags & IDE_DFLAG_PRESENT)) {
-			tp_ops->dev_select(drive);
-			tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
-			mdelay(2);
-			rc = ide_wait_not_busy(hwif, 35000);
-			if (rc)
-				goto out;
-		} else
-			printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
-					  drive->name);
-	}
-out:
-	/* Exit function with master reselected (let's be sane) */
-	if (i)
-		tp_ops->dev_select(hwif->devices[0]);
-
-	return rc;
-}
-
-/**
- *	ide_undecoded_slave	-	look for bad CF adapters
- *	@dev1: slave device
- *
- *	Analyse the drives on the interface and attempt to decide if we
- *	have the same drive viewed twice. This occurs with crap CF adapters
- *	and PCMCIA sometimes.
- */
-
-void ide_undecoded_slave(ide_drive_t *dev1)
-{
-	ide_drive_t *dev0 = dev1->hwif->devices[0];
-
-	if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
-		return;
-
-	/* If the models don't match they are not the same product */
-	if (strcmp((char *)&dev0->id[ATA_ID_PROD],
-		   (char *)&dev1->id[ATA_ID_PROD]))
-		return;
-
-	/* Serial numbers do not match */
-	if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
-		    (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
-		return;
-
-	/* No serial number, thankfully very rare for CF */
-	if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
-		return;
-
-	/* Appears to be an IDE flash adapter with decode bugs */
-	printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
-
-	dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
-}
-
-EXPORT_SYMBOL_GPL(ide_undecoded_slave);
-
-static int ide_probe_port(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	unsigned int irqd;
-	int i, rc = -ENODEV;
-
-	BUG_ON(hwif->present);
-
-	if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
-	    (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
-		return -EACCES;
-
-	/*
-	 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
-	 * we'll install our IRQ driver much later...
-	 */
-	irqd = hwif->irq;
-	if (irqd)
-		disable_irq(hwif->irq);
-
-	if (ide_port_wait_ready(hwif) == -EBUSY)
-		printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
-
-	/*
-	 * Second drive should only exist if first drive was found,
-	 * but a lot of cdrom drives are configured as single slaves.
-	 */
-	ide_port_for_each_dev(i, drive, hwif) {
-		(void) probe_for_drive(drive);
-		if (drive->dev_flags & IDE_DFLAG_PRESENT)
-			rc = 0;
-	}
-
-	/*
-	 * Use cached IRQ number. It might be (and is...) changed by probe
-	 * code above
-	 */
-	if (irqd)
-		enable_irq(irqd);
-
-	return rc;
-}
-
-static void ide_port_tune_devices(ide_hwif_t *hwif)
-{
-	const struct ide_port_ops *port_ops = hwif->port_ops;
-	ide_drive_t *drive;
-	int i;
-
-	ide_port_for_each_present_dev(i, drive, hwif) {
-		ide_check_nien_quirk_list(drive);
-
-		if (port_ops && port_ops->quirkproc)
-			port_ops->quirkproc(drive);
-	}
-
-	ide_port_for_each_present_dev(i, drive, hwif) {
-		ide_set_max_pio(drive);
-
-		drive->dev_flags |= IDE_DFLAG_NICE1;
-
-		if (hwif->dma_ops)
-			ide_set_dma(drive);
-	}
-}
-
-static void ide_initialize_rq(struct request *rq)
-{
-	struct ide_request *req = blk_mq_rq_to_pdu(rq);
-
-	req->special = NULL;
-	scsi_req_init(&req->sreq);
-	req->sreq.sense = req->sense;
-}
-
-static const struct blk_mq_ops ide_mq_ops = {
-	.queue_rq		= ide_queue_rq,
-	.initialize_rq_fn	= ide_initialize_rq,
-};
-
-/*
- * init request queue
- */
-static int ide_init_queue(ide_drive_t *drive)
-{
-	struct request_queue *q;
-	ide_hwif_t *hwif = drive->hwif;
-	int max_sectors = 256;
-	int max_sg_entries = PRD_ENTRIES;
-	struct blk_mq_tag_set *set;
-
-	/*
-	 *	Our default set up assumes the normal IDE case,
-	 *	that is 64K segmenting, standard PRD setup
-	 *	and LBA28. Some drivers then impose their own
-	 *	limits and LBA48 we could raise it but as yet
-	 *	do not.
-	 */
-
-	set = &drive->tag_set;
-	set->ops = &ide_mq_ops;
-	set->nr_hw_queues = 1;
-	set->queue_depth = 32;
-	set->reserved_tags = 1;
-	set->cmd_size = sizeof(struct ide_request);
-	set->numa_node = hwif_to_node(hwif);
-	set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING;
-	if (blk_mq_alloc_tag_set(set))
-		return 1;
-
-	q = blk_mq_init_queue(set);
-	if (IS_ERR(q)) {
-		blk_mq_free_tag_set(set);
-		return 1;
-	}
-
-	blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
-
-	q->queuedata = drive;
-	blk_queue_segment_boundary(q, 0xffff);
-
-	if (hwif->rqsize < max_sectors)
-		max_sectors = hwif->rqsize;
-	blk_queue_max_hw_sectors(q, max_sectors);
-
-#ifdef CONFIG_PCI
-	/* When we have an IOMMU, we may have a problem where pci_map_sg()
-	 * creates segments that don't completely match our boundary
-	 * requirements and thus need to be broken up again. Because it
-	 * doesn't align properly either, we may actually have to break up
-	 * to more segments than what was we got in the first place, a max
-	 * worst case is twice as many.
-	 * This will be fixed once we teach pci_map_sg() about our boundary
-	 * requirements, hopefully soon. *FIXME*
-	 */
-	max_sg_entries >>= 1;
-#endif /* CONFIG_PCI */
-
-	blk_queue_max_segments(q, max_sg_entries);
-
-	/* assign drive queue */
-	drive->queue = q;
-
-	return 0;
-}
-
-static DEFINE_MUTEX(ide_cfg_mtx);
-
-/*
- * For any present drive:
- * - allocate the block device queue
- */
-static int ide_port_setup_devices(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	int i, j = 0;
-
-	mutex_lock(&ide_cfg_mtx);
-	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);
-			drive->dev_flags &= ~IDE_DFLAG_PRESENT;
-			continue;
-		}
-
-		j++;
-	}
-	mutex_unlock(&ide_cfg_mtx);
-
-	return j;
-}
-
-static void ide_host_enable_irqs(struct ide_host *host)
-{
-	ide_hwif_t *hwif;
-	int i;
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif == NULL)
-			continue;
-
-		/* clear any pending IRQs */
-		hwif->tp_ops->read_status(hwif);
-
-		/* unmask IRQs */
-		if (hwif->io_ports.ctl_addr)
-			hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
-	}
-}
-
-/*
- * This routine sets up the IRQ for an IDE interface.
- */
-static int init_irq (ide_hwif_t *hwif)
-{
-	struct ide_io_ports *io_ports = &hwif->io_ports;
-	struct ide_host *host = hwif->host;
-	irq_handler_t irq_handler = host->irq_handler;
-	int sa = host->irq_flags;
-
-	if (irq_handler == NULL)
-		irq_handler = ide_intr;
-
-	if (!host->get_lock)
-		if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
-			goto out_up;
-
-#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,
-		io_ports->ctl_addr, hwif->irq);
-#else
-	printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
-		io_ports->data_addr, hwif->irq);
-#endif /* __mc68000__ */
-	if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
-		printk(KERN_CONT " (serialized)");
-	printk(KERN_CONT "\n");
-
-	return 0;
-out_up:
-	return 1;
-}
-
-static void ata_probe(dev_t dev)
-{
-	request_module("ide-disk");
-	request_module("ide-cd");
-	request_module("ide-tape");
-	request_module("ide-floppy");
-}
-
-void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned int unit = drive->dn & 1;
-
-	disk->major = hwif->major;
-	disk->first_minor = unit << PARTN_BITS;
-	sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
-	disk->queue = drive->queue;
-}
-
-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_proc_unregister_device(drive);
-
-	if (drive->sense_rq)
-		blk_mq_free_request(drive->sense_rq);
-
-	blk_cleanup_queue(drive->queue);
-	drive->queue = NULL;
-	blk_mq_free_tag_set(&drive->tag_set);
-
-	drive->dev_flags &= ~IDE_DFLAG_PRESENT;
-
-	complete(&drive->gendev_rel_comp);
-}
-
-static int hwif_init(ide_hwif_t *hwif)
-{
-	if (!hwif->irq) {
-		printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
-		return 0;
-	}
-
-	if (__register_blkdev(hwif->major, hwif->name, ata_probe))
-		return 0;
-
-	if (!hwif->sg_max_nents)
-		hwif->sg_max_nents = PRD_ENTRIES;
-
-	hwif->sg_table = kmalloc_array(hwif->sg_max_nents,
-				       sizeof(struct scatterlist),
-				       GFP_KERNEL);
-	if (!hwif->sg_table) {
-		printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
-		goto out;
-	}
-
-	sg_init_table(hwif->sg_table, hwif->sg_max_nents);
-	
-	if (init_irq(hwif)) {
-		printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
-			hwif->name, hwif->irq);
-		goto out;
-	}
-
-	return 1;
-
-out:
-	unregister_blkdev(hwif->major, hwif->name);
-	return 0;
-}
-
-static void hwif_register_devices(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	unsigned int i;
-
-	ide_port_for_each_present_dev(i, drive, hwif) {
-		struct device *dev = &drive->gendev;
-		int ret;
-
-		dev_set_name(dev, "%u.%u", hwif->index, i);
-		dev_set_drvdata(dev, drive);
-		dev->parent = &hwif->gendev;
-		dev->bus = &ide_bus_type;
-		dev->release = drive_release_dev;
-
-		ret = device_register(dev);
-		if (ret < 0)
-			printk(KERN_WARNING "IDE: %s: device_register error: "
-					    "%d\n", __func__, ret);
-	}
-}
-
-static void ide_port_init_devices(ide_hwif_t *hwif)
-{
-	const struct ide_port_ops *port_ops = hwif->port_ops;
-	ide_drive_t *drive;
-	int i;
-
-	ide_port_for_each_dev(i, drive, hwif) {
-		drive->dn = i + hwif->channel * 2;
-
-		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)
-			drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
-
-		drive->pio_mode = XFER_PIO_0;
-
-		if (port_ops && port_ops->init_dev)
-			port_ops->init_dev(drive);
-	}
-}
-
-static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
-			  const struct ide_port_info *d)
-{
-	hwif->channel = port;
-
-	hwif->chipset = d->chipset ? d->chipset : ide_pci;
-
-	if (d->init_iops)
-		d->init_iops(hwif);
-
-	/* ->host_flags may be set by ->init_iops (or even earlier...) */
-	hwif->host_flags |= d->host_flags;
-	hwif->pio_mask = d->pio_mask;
-
-	if (d->tp_ops)
-		hwif->tp_ops = d->tp_ops;
-
-	/* ->set_pio_mode for DTC2278 is currently limited to port 0 */
-	if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
-		hwif->port_ops = d->port_ops;
-
-	hwif->swdma_mask = d->swdma_mask;
-	hwif->mwdma_mask = d->mwdma_mask;
-	hwif->ultra_mask = d->udma_mask;
-
-	if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
-		int rc;
-
-		hwif->dma_ops = d->dma_ops;
-
-		if (d->init_dma)
-			rc = d->init_dma(hwif, d);
-		else
-			rc = ide_hwif_setup_dma(hwif, d);
-
-		if (rc < 0) {
-			printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
-
-			hwif->dma_ops = NULL;
-			hwif->dma_base = 0;
-			hwif->swdma_mask = 0;
-			hwif->mwdma_mask = 0;
-			hwif->ultra_mask = 0;
-		}
-	}
-
-	if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
-	    ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
-		hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
-
-	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)
-		d->init_hwif(hwif);
-}
-
-static void ide_port_cable_detect(ide_hwif_t *hwif)
-{
-	const struct ide_port_ops *port_ops = hwif->port_ops;
-
-	if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
-		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-			hwif->cbl = port_ops->cable_detect(hwif);
-	}
-}
-
-/*
- * Deferred request list insertion handler
- */
-static void drive_rq_insert_work(struct work_struct *work)
-{
-	ide_drive_t *drive = container_of(work, ide_drive_t, rq_work);
-	ide_hwif_t *hwif = drive->hwif;
-	struct request *rq;
-	blk_status_t ret;
-	LIST_HEAD(list);
-
-	blk_mq_quiesce_queue(drive->queue);
-
-	ret = BLK_STS_OK;
-	spin_lock_irq(&hwif->lock);
-	while (!list_empty(&drive->rq_list)) {
-		rq = list_first_entry(&drive->rq_list, struct request, queuelist);
-		list_del_init(&rq->queuelist);
-
-		spin_unlock_irq(&hwif->lock);
-		ret = ide_issue_rq(drive, rq, true);
-		spin_lock_irq(&hwif->lock);
-	}
-	spin_unlock_irq(&hwif->lock);
-
-	blk_mq_unquiesce_queue(drive->queue);
-
-	if (ret != BLK_STS_OK)
-		kblockd_schedule_work(&drive->rq_work);
-}
-
-static const u8 ide_hwif_to_major[] =
-	{ IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
-	  IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
-
-static void ide_port_init_devices_data(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	int i;
-
-	ide_port_for_each_dev(i, drive, hwif) {
-		u8 j = (hwif->index * MAX_DRIVES) + i;
-		u16 *saved_id = drive->id;
-
-		memset(drive, 0, sizeof(*drive));
-		memset(saved_id, 0, SECTOR_SIZE);
-		drive->id = saved_id;
-
-		drive->media			= ide_disk;
-		drive->select			= (i << 4) | ATA_DEVICE_OBS;
-		drive->hwif			= hwif;
-		drive->ready_stat		= ATA_DRDY;
-		drive->bad_wstat		= BAD_W_STAT;
-		drive->special_flags		= IDE_SFLAG_RECALIBRATE |
-						  IDE_SFLAG_SET_GEOMETRY;
-		drive->name[0]			= 'h';
-		drive->name[1]			= 'd';
-		drive->name[2]			= 'a' + j;
-		drive->max_failures		= IDE_DEFAULT_MAX_FAILURES;
-
-		INIT_LIST_HEAD(&drive->list);
-		init_completion(&drive->gendev_rel_comp);
-
-		INIT_WORK(&drive->rq_work, drive_rq_insert_work);
-		INIT_LIST_HEAD(&drive->rq_list);
-	}
-}
-
-static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
-{
-	/* fill in any non-zero initial values */
-	hwif->index	= index;
-	hwif->major	= ide_hwif_to_major[index];
-
-	hwif->name[0]	= 'i';
-	hwif->name[1]	= 'd';
-	hwif->name[2]	= 'e';
-	hwif->name[3]	= '0' + index;
-
-	spin_lock_init(&hwif->lock);
-
-	timer_setup(&hwif->timer, ide_timer_expiry, 0);
-
-	init_completion(&hwif->gendev_rel_comp);
-
-	hwif->tp_ops = &default_tp_ops;
-
-	ide_port_init_devices_data(hwif);
-}
-
-static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
-{
-	memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
-	hwif->irq = hw->irq;
-	hwif->dev = hw->dev;
-	hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
-	hwif->config_data = hw->config;
-}
-
-static unsigned int ide_indexes;
-
-/**
- *	ide_find_port_slot	-	find free port slot
- *	@d: IDE port info
- *
- *	Return the new port slot index or -ENOENT if we are out of free slots.
- */
-
-static int ide_find_port_slot(const struct ide_port_info *d)
-{
-	int idx = -ENOENT;
-	u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
-	u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
-
-	/*
-	 * Claim an unassigned slot.
-	 *
-	 * Give preference to claiming other slots before claiming ide0/ide1,
-	 * just in case there's another interface yet-to-be-scanned
-	 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
-	 *
-	 * Unless there is a bootable card that does not use the standard
-	 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
-	 */
-	mutex_lock(&ide_cfg_mtx);
-	if (bootable) {
-		if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
-			idx = ffz(ide_indexes | i);
-	} else {
-		if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
-			idx = ffz(ide_indexes | 3);
-		else if ((ide_indexes & 3) != 3)
-			idx = ffz(ide_indexes);
-	}
-	if (idx >= 0)
-		ide_indexes |= (1 << idx);
-	mutex_unlock(&ide_cfg_mtx);
-
-	return idx;
-}
-
-static void ide_free_port_slot(int idx)
-{
-	mutex_lock(&ide_cfg_mtx);
-	ide_indexes &= ~(1 << idx);
-	mutex_unlock(&ide_cfg_mtx);
-}
-
-static void ide_port_free_devices(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	int i;
-
-	ide_port_for_each_dev(i, drive, hwif) {
-		kfree(drive->id);
-		kfree(drive);
-	}
-}
-
-static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
-{
-	ide_drive_t *drive;
-	int i;
-
-	for (i = 0; i < MAX_DRIVES; i++) {
-		drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
-		if (drive == NULL)
-			goto out_nomem;
-
-		/*
-		 * In order to keep things simple we have an id
-		 * block for all drives at all times. If the device
-		 * is pre ATA or refuses ATA/ATAPI identify we
-		 * will add faked data to this.
-		 *
-		 * Also note that 0 everywhere means "can't do X"
-		 */
-		drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
-		if (drive->id == NULL)
-			goto out_free_drive;
-
-		hwif->devices[i] = drive;
-	}
-	return 0;
-
-out_free_drive:
-	kfree(drive);
-out_nomem:
-	ide_port_free_devices(hwif);
-	return -ENOMEM;
-}
-
-struct ide_host *ide_host_alloc(const struct ide_port_info *d,
-				struct ide_hw **hws, unsigned int n_ports)
-{
-	struct ide_host *host;
-	struct device *dev = hws[0] ? hws[0]->dev : NULL;
-	int node = dev ? dev_to_node(dev) : -1;
-	int i;
-
-	host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
-	if (host == NULL)
-		return NULL;
-
-	for (i = 0; i < n_ports; i++) {
-		ide_hwif_t *hwif;
-		int idx;
-
-		if (hws[i] == NULL)
-			continue;
-
-		hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
-		if (hwif == NULL)
-			continue;
-
-		if (ide_port_alloc_devices(hwif, node) < 0) {
-			kfree(hwif);
-			continue;
-		}
-
-		idx = ide_find_port_slot(d);
-		if (idx < 0) {
-			printk(KERN_ERR "%s: no free slot for interface\n",
-					d ? d->name : "ide");
-			ide_port_free_devices(hwif);
-			kfree(hwif);
-			continue;
-		}
-
-		ide_init_port_data(hwif, idx);
-
-		hwif->host = host;
-
-		host->ports[i] = hwif;
-		host->n_ports++;
-	}
-
-	if (host->n_ports == 0) {
-		kfree(host);
-		return NULL;
-	}
-
-	host->dev[0] = dev;
-
-	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;
-		host->irq_flags = d->irq_flags;
-	}
-
-	return host;
-}
-EXPORT_SYMBOL_GPL(ide_host_alloc);
-
-static void ide_port_free(ide_hwif_t *hwif)
-{
-	ide_port_free_devices(hwif);
-	ide_free_port_slot(hwif->index);
-	kfree(hwif);
-}
-
-static void ide_disable_port(ide_hwif_t *hwif)
-{
-	struct ide_host *host = hwif->host;
-	int i;
-
-	printk(KERN_INFO "%s: disabling port\n", hwif->name);
-
-	for (i = 0; i < MAX_HOST_PORTS; i++) {
-		if (host->ports[i] == hwif) {
-			host->ports[i] = NULL;
-			host->n_ports--;
-		}
-	}
-
-	ide_port_free(hwif);
-}
-
-int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
-		      struct ide_hw **hws)
-{
-	ide_hwif_t *hwif, *mate = NULL;
-	int i, j = 0;
-
-	pr_warn("legacy IDE will be removed in 2021, please switch to libata\n"
-		"Report any missing HW support to linux-ide@vger.kernel.org\n");
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif == NULL) {
-			mate = NULL;
-			continue;
-		}
-
-		ide_init_port_hw(hwif, hws[i]);
-		ide_port_apply_params(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);
-
-		hwif->port_flags |= IDE_PFLAG_PROBING;
-
-		ide_port_init_devices(hwif);
-	}
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif == NULL)
-			continue;
-
-		if (ide_probe_port(hwif) == 0)
-			hwif->present = 1;
-
-		hwif->port_flags &= ~IDE_PFLAG_PROBING;
-
-		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;
-			}
-		}
-
-		if (hwif->present)
-			ide_port_tune_devices(hwif);
-	}
-
-	ide_host_enable_irqs(host);
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif == NULL)
-			continue;
-
-		if (hwif_init(hwif) == 0) {
-			printk(KERN_INFO "%s: failed to initialize IDE "
-					 "interface\n", hwif->name);
-			device_unregister(hwif->portdev);
-			device_unregister(&hwif->gendev);
-			ide_disable_port(hwif);
-			continue;
-		}
-
-		if (hwif->present)
-			if (ide_port_setup_devices(hwif) == 0) {
-				hwif->present = 0;
-				continue;
-			}
-
-		j++;
-
-		ide_acpi_init_port(hwif);
-
-		if (hwif->present)
-			ide_acpi_port_init_devices(hwif);
-	}
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif == NULL)
-			continue;
-
-		ide_sysfs_register_port(hwif);
-		ide_proc_register_port(hwif);
-
-		if (hwif->present) {
-			ide_proc_port_register_devices(hwif);
-			hwif_register_devices(hwif);
-		}
-	}
-
-	return j ? 0 : -1;
-}
-EXPORT_SYMBOL_GPL(ide_host_register);
-
-int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
-		 unsigned int n_ports, struct ide_host **hostp)
-{
-	struct ide_host *host;
-	int rc;
-
-	host = ide_host_alloc(d, hws, n_ports);
-	if (host == NULL)
-		return -ENOMEM;
-
-	rc = ide_host_register(host, d, hws);
-	if (rc) {
-		ide_host_free(host);
-		return rc;
-	}
-
-	if (hostp)
-		*hostp = host;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(ide_host_add);
-
-static void __ide_port_unregister_devices(ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	int i;
-
-	ide_port_for_each_present_dev(i, drive, hwif) {
-		device_unregister(&drive->gendev);
-		wait_for_completion(&drive->gendev_rel_comp);
-	}
-}
-
-void ide_port_unregister_devices(ide_hwif_t *hwif)
-{
-	mutex_lock(&ide_cfg_mtx);
-	__ide_port_unregister_devices(hwif);
-	hwif->present = 0;
-	ide_port_init_devices_data(hwif);
-	mutex_unlock(&ide_cfg_mtx);
-}
-EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
-
-/**
- *	ide_unregister		-	free an IDE interface
- *	@hwif: IDE interface
- *
- *	Perform the final unregister of an IDE interface.
- *
- *	Locking:
- *	The caller must not hold the IDE locks.
- *
- *	It is up to the caller to be sure there is no pending I/O here,
- *	and that the interface will not be reopened (present/vanishing
- *	locking isn't yet done BTW).
- */
-
-static void ide_unregister(ide_hwif_t *hwif)
-{
-	mutex_lock(&ide_cfg_mtx);
-
-	if (hwif->present) {
-		__ide_port_unregister_devices(hwif);
-		hwif->present = 0;
-	}
-
-	ide_proc_unregister_port(hwif);
-
-	if (!hwif->host->get_lock)
-		free_irq(hwif->irq, hwif);
-
-	device_unregister(hwif->portdev);
-	device_unregister(&hwif->gendev);
-	wait_for_completion(&hwif->gendev_rel_comp);
-
-	/*
-	 * Remove us from the kernel's knowledge
-	 */
-	kfree(hwif->sg_table);
-	unregister_blkdev(hwif->major, hwif->name);
-
-	ide_release_dma_engine(hwif);
-
-	mutex_unlock(&ide_cfg_mtx);
-}
-
-void ide_host_free(struct ide_host *host)
-{
-	ide_hwif_t *hwif;
-	int i;
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif)
-			ide_port_free(hwif);
-	}
-
-	kfree(host);
-}
-EXPORT_SYMBOL_GPL(ide_host_free);
-
-void ide_host_remove(struct ide_host *host)
-{
-	ide_hwif_t *hwif;
-	int i;
-
-	ide_host_for_each_port(i, hwif, host) {
-		if (hwif)
-			ide_unregister(hwif);
-	}
-
-	ide_host_free(host);
-}
-EXPORT_SYMBOL_GPL(ide_host_remove);
-
-void ide_port_scan(ide_hwif_t *hwif)
-{
-	int rc;
-
-	ide_port_apply_params(hwif);
-	ide_port_cable_detect(hwif);
-
-	hwif->port_flags |= IDE_PFLAG_PROBING;
-
-	ide_port_init_devices(hwif);
-
-	rc = ide_probe_port(hwif);
-
-	hwif->port_flags &= ~IDE_PFLAG_PROBING;
-
-	if (rc < 0)
-		return;
-
-	hwif->present = 1;
-
-	ide_port_tune_devices(hwif);
-	ide_port_setup_devices(hwif);
-	ide_acpi_port_init_devices(hwif);
-	hwif_register_devices(hwif);
-	ide_proc_port_register_devices(hwif);
-}
-EXPORT_SYMBOL_GPL(ide_port_scan);