]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blobdiff - drivers/ide/ide-probe.c
ide: move read_sff_dma_status() method to 'struct ide_dma_ops'
[mirror_ubuntu-bionic-kernel.git] / drivers / ide / ide-probe.c
index c5adb7b9c5b5eeedad09163c395a03dc64704259..0ccbb4459fb913faf89370422071cf01d3c17e9a 100644 (file)
@@ -189,7 +189,7 @@ static void ide_classify_atapi_dev(ide_drive_t *drive)
 
 static void do_identify(ide_drive_t *drive, u8 cmd)
 {
-       ide_hwif_t *hwif = HWIF(drive);
+       ide_hwif_t *hwif = drive->hwif;
        u16 *id = drive->id;
        char *m = (char *)&id[ATA_ID_PROD];
        unsigned long flags;
@@ -266,7 +266,7 @@ err_misc:
 
 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 {
-       ide_hwif_t *hwif = HWIF(drive);
+       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;
@@ -341,7 +341,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
  
 static int try_to_identify (ide_drive_t *drive, u8 cmd)
 {
-       ide_hwif_t *hwif = HWIF(drive);
+       ide_hwif_t *hwif = drive->hwif;
        const struct ide_tp_ops *tp_ops = hwif->tp_ops;
        int retval;
        int autoprobe = 0;
@@ -438,7 +438,7 @@ static u8 ide_read_device(ide_drive_t *drive)
 
 static int do_probe (ide_drive_t *drive, u8 cmd)
 {
-       ide_hwif_t *hwif = HWIF(drive);
+       ide_hwif_t *hwif = drive->hwif;
        const struct ide_tp_ops *tp_ops = hwif->tp_ops;
        int rc;
        u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
@@ -463,7 +463,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
        if (ide_read_device(drive) != drive->select && present == 0) {
                if (drive->dn & 1) {
                        /* exit with drive0 selected */
-                       SELECT_DRIVE(&hwif->drives[0]);
+                       SELECT_DRIVE(hwif->devices[0]);
                        /* allow ATA_BUSY to assert & clear */
                        msleep(50);
                }
@@ -509,7 +509,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
        }
        if (drive->dn & 1) {
                /* exit with drive0 selected */
-               SELECT_DRIVE(&hwif->drives[0]);
+               SELECT_DRIVE(hwif->devices[0]);
                msleep(50);
                /* ensure drive irq is clear */
                (void)tp_ops->read_status(hwif);
@@ -522,7 +522,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
  */
 static void enable_nest (ide_drive_t *drive)
 {
-       ide_hwif_t *hwif = HWIF(drive);
+       ide_hwif_t *hwif = drive->hwif;
        const struct ide_tp_ops *tp_ops = hwif->tp_ops;
        u8 stat;
 
@@ -697,7 +697,8 @@ out:
 
 static int ide_port_wait_ready(ide_hwif_t *hwif)
 {
-       int unit, rc;
+       ide_drive_t *drive;
+       int i, rc;
 
        printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
 
@@ -714,9 +715,7 @@ static int ide_port_wait_ready(ide_hwif_t *hwif)
                return rc;
 
        /* Now make sure both master & slave are ready */
-       for (unit = 0; unit < MAX_DRIVES; unit++) {
-               ide_drive_t *drive = &hwif->drives[unit];
-
+       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)) {
@@ -732,8 +731,8 @@ static int ide_port_wait_ready(ide_hwif_t *hwif)
        }
 out:
        /* Exit function with master reselected (let's be sane) */
-       if (unit)
-               SELECT_DRIVE(&hwif->drives[0]);
+       if (i)
+               SELECT_DRIVE(hwif->devices[0]);
 
        return rc;
 }
@@ -749,7 +748,7 @@ out:
 
 void ide_undecoded_slave(ide_drive_t *dev1)
 {
-       ide_drive_t *dev0 = &dev1->hwif->drives[0];
+       ide_drive_t *dev0 = dev1->hwif->devices[0];
 
        if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
                return;
@@ -778,14 +777,15 @@ 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 unit, rc = -ENODEV;
+       int i, rc = -ENODEV;
 
        BUG_ON(hwif->present);
 
-       if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) &&
-           (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE))
+       if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
+           (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
                return -EACCES;
 
        /*
@@ -796,7 +796,8 @@ static int ide_probe_port(ide_hwif_t *hwif)
        if (irqd)
                disable_irq(hwif->irq);
 
-       local_irq_set(flags);
+       local_irq_save(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);
@@ -805,9 +806,7 @@ static int ide_probe_port(ide_hwif_t *hwif)
         * Second drive should only exist if first drive was found,
         * but a lot of cdrom drives are configured as single slaves.
         */
-       for (unit = 0; unit < MAX_DRIVES; ++unit) {
-               ide_drive_t *drive = &hwif->drives[unit];
-
+       ide_port_for_each_dev(i, drive, hwif) {
                (void) probe_for_drive(drive);
                if (drive->dev_flags & IDE_DFLAG_PRESENT)
                        rc = 0;
@@ -828,20 +827,17 @@ static int ide_probe_port(ide_hwif_t *hwif)
 static void ide_port_tune_devices(ide_hwif_t *hwif)
 {
        const struct ide_port_ops *port_ops = hwif->port_ops;
-       int unit;
-
-       for (unit = 0; unit < MAX_DRIVES; unit++) {
-               ide_drive_t *drive = &hwif->drives[unit];
+       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);
                }
        }
 
-       for (unit = 0; unit < MAX_DRIVES; ++unit) {
-               ide_drive_t *drive = &hwif->drives[unit];
-
+       ide_port_for_each_dev(i, drive, hwif) {
                if (drive->dev_flags & IDE_DFLAG_PRESENT) {
                        ide_set_max_pio(drive);
 
@@ -852,11 +848,8 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
                }
        }
 
-       for (unit = 0; unit < MAX_DRIVES; ++unit) {
-               ide_drive_t *drive = &hwif->drives[unit];
-
-               if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||
-                   drive->id[ATA_ID_DWORD_IO])
+       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;
@@ -869,7 +862,7 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
 static int ide_init_queue(ide_drive_t *drive)
 {
        struct request_queue *q;
-       ide_hwif_t *hwif = HWIF(drive);
+       ide_hwif_t *hwif = drive->hwif;
        int max_sectors = 256;
        int max_sg_entries = PRD_ENTRIES;
 
@@ -918,36 +911,19 @@ static int ide_init_queue(ide_drive_t *drive)
        return 0;
 }
 
-static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
-{
-       ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
-
-       spin_lock_irq(&hwgroup->lock);
-       if (!hwgroup->drive) {
-               /* first drive for hwgroup. */
-               drive->next = drive;
-               hwgroup->drive = drive;
-               hwgroup->hwif = HWIF(hwgroup->drive);
-       } else {
-               drive->next = hwgroup->drive->next;
-               hwgroup->drive->next = drive;
-       }
-       spin_unlock_irq(&hwgroup->lock);
-}
+static DEFINE_MUTEX(ide_cfg_mtx);
 
 /*
  * For any present drive:
  * - allocate the block device queue
- * - link drive into the hwgroup
  */
 static int ide_port_setup_devices(ide_hwif_t *hwif)
 {
+       ide_drive_t *drive;
        int i, j = 0;
 
        mutex_lock(&ide_cfg_mtx);
-       for (i = 0; i < MAX_DRIVES; i++) {
-               ide_drive_t *drive = &hwif->drives[i];
-
+       ide_port_for_each_dev(i, drive, hwif) {
                if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
                        continue;
 
@@ -961,139 +937,39 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
                }
 
                j++;
-
-               ide_add_drive_to_hwgroup(drive);
        }
        mutex_unlock(&ide_cfg_mtx);
 
        return j;
 }
 
-static ide_hwif_t *ide_ports[MAX_HWIFS];
-
-void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
-{
-       ide_hwgroup_t *hwgroup = hwif->hwgroup;
-
-       ide_ports[hwif->index] = NULL;
-
-       spin_lock_irq(&hwgroup->lock);
-       /*
-        * Remove us from the hwgroup, and free
-        * the hwgroup if we were the only member
-        */
-       if (hwif->next == hwif) {
-               BUG_ON(hwgroup->hwif != hwif);
-               kfree(hwgroup);
-       } else {
-               /* There is another interface in hwgroup.
-                * Unlink us, and set hwgroup->drive and ->hwif to
-                * something sane.
-                */
-               ide_hwif_t *g = hwgroup->hwif;
-
-               while (g->next != hwif)
-                       g = g->next;
-               g->next = hwif->next;
-               if (hwgroup->hwif == hwif) {
-                       /* Chose a random hwif for hwgroup->hwif.
-                        * It's guaranteed that there are no drives
-                        * left in the hwgroup.
-                        */
-                       BUG_ON(hwgroup->drive != NULL);
-                       hwgroup->hwif = g;
-               }
-               BUG_ON(hwgroup->hwif == hwif);
-       }
-       spin_unlock_irq(&hwgroup->lock);
-}
-
 /*
- * This routine sets up the irq for an ide interface, and creates a new
- * hwgroup for the irq/hwif if none was previously assigned.
- *
- * Much of the code is for correctly detecting/handling irq sharing
- * and irq serialization situations.  This is somewhat complex because
- * it handles static as well as dynamic (PCMCIA) IDE interfaces.
+ * 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;
-       unsigned int index;
-       ide_hwgroup_t *hwgroup;
-       ide_hwif_t *match = NULL;
+       int sa = 0;
 
        mutex_lock(&ide_cfg_mtx);
-       hwif->hwgroup = NULL;
+       spin_lock_init(&hwif->lock);
 
-       for (index = 0; index < MAX_HWIFS; index++) {
-               ide_hwif_t *h = ide_ports[index];
+       init_timer(&hwif->timer);
+       hwif->timer.function = &ide_timer_expiry;
+       hwif->timer.data = (unsigned long)hwif;
 
-               if (h && h->hwgroup) {  /* scan only initialized ports */
-                       if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) {
-                               if (hwif->host == h->host)
-                                       match = h;
-                       }
-               }
-       }
-
-       /*
-        * If we are still without a hwgroup, then form a new one
-        */
-       if (match) {
-               hwgroup = match->hwgroup;
-               hwif->hwgroup = hwgroup;
-               /*
-                * Link us into the hwgroup.
-                * This must be done early, do ensure that unexpected_intr
-                * can find the hwif and prevent irq storms.
-                * No drives are attached to the new hwif, choose_drive
-                * can't do anything stupid (yet).
-                * Add ourself as the 2nd entry to the hwgroup->hwif
-                * linked list, the first entry is the hwif that owns
-                * hwgroup->handler - do not change that.
-                */
-               spin_lock_irq(&hwgroup->lock);
-               hwif->next = hwgroup->hwif->next;
-               hwgroup->hwif->next = hwif;
-               BUG_ON(hwif->next == hwif);
-               spin_unlock_irq(&hwgroup->lock);
-       } else {
-               hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
-                                      hwif_to_node(hwif));
-               if (hwgroup == NULL)
-                       goto out_up;
-
-               spin_lock_init(&hwgroup->lock);
-
-               hwif->hwgroup = hwgroup;
-               hwgroup->hwif = hwif->next = hwif;
-
-               init_timer(&hwgroup->timer);
-               hwgroup->timer.function = &ide_timer_expiry;
-               hwgroup->timer.data = (unsigned long) hwgroup;
-       }
-
-       ide_ports[hwif->index] = hwif;
-
-       /*
-        * Allocate the irq, if not already obtained for another hwif
-        */
-       if (!match || match->irq != hwif->irq) {
-               int sa = 0;
 #if defined(__mc68000__)
-               sa = IRQF_SHARED;
+       sa = IRQF_SHARED;
 #endif /* __mc68000__ */
 
-               if (hwif->chipset == ide_pci)
-                       sa = IRQF_SHARED;
+       if (hwif->chipset == ide_pci)
+               sa = IRQF_SHARED;
 
-               if (io_ports->ctl_addr)
-                       hwif->tp_ops->set_irq(hwif, 1);
+       if (io_ports->ctl_addr)
+               hwif->tp_ops->set_irq(hwif, 1);
 
-               if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
-                       goto out_unlink;
-       }
+       if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif))
+               goto out_up;
 
        if (!hwif->rqsize) {
                if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
@@ -1111,14 +987,12 @@ static int init_irq (ide_hwif_t *hwif)
        printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
                io_ports->data_addr, hwif->irq);
 #endif /* __mc68000__ */
-       if (match)
-               printk(KERN_CONT " (serialized with %s)", match->name);
+       if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
+               printk(KERN_CONT " (serialized)");
        printk(KERN_CONT "\n");
 
        mutex_unlock(&ide_cfg_mtx);
        return 0;
-out_unlink:
-       ide_remove_port_from_hwgroup(hwif);
 out_up:
        mutex_unlock(&ide_cfg_mtx);
        return 1;
@@ -1134,7 +1008,7 @@ static struct kobject *ata_probe(dev_t dev, int *part, void *data)
 {
        ide_hwif_t *hwif = data;
        int unit = *part >> PARTN_BITS;
-       ide_drive_t *drive = &hwif->drives[unit];
+       ide_drive_t *drive = hwif->devices[unit];
 
        if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
                return NULL;
@@ -1196,47 +1070,23 @@ void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
 
 EXPORT_SYMBOL_GPL(ide_init_disk);
 
-static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
-{
-       ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
-
-       if (drive == drive->next) {
-               /* special case: last drive from hwgroup. */
-               BUG_ON(hwgroup->drive != drive);
-               hwgroup->drive = NULL;
-       } else {
-               ide_drive_t *walk;
-
-               walk = hwgroup->drive;
-               while (walk->next != drive)
-                       walk = walk->next;
-               walk->next = drive->next;
-               if (hwgroup->drive == drive) {
-                       hwgroup->drive = drive->next;
-                       hwgroup->hwif = hwgroup->drive->hwif;
-               }
-       }
-       BUG_ON(hwgroup->drive == drive);
-}
-
 static void drive_release_dev (struct device *dev)
 {
        ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
-       ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
+       ide_hwif_t *hwif = drive->hwif;
 
        ide_proc_unregister_device(drive);
 
-       spin_lock_irq(&hwgroup->lock);
-       ide_remove_drive_from_hwgroup(drive);
+       spin_lock_irq(&hwif->lock);
        kfree(drive->id);
        drive->id = NULL;
        drive->dev_flags &= ~IDE_DFLAG_PRESENT;
        /* Messed up locking ... */
-       spin_unlock_irq(&hwgroup->lock);
+       spin_unlock_irq(&hwif->lock);
        blk_cleanup_queue(drive->queue);
-       spin_lock_irq(&hwgroup->lock);
+       spin_lock_irq(&hwif->lock);
        drive->queue = NULL;
-       spin_unlock_irq(&hwgroup->lock);
+       spin_unlock_irq(&hwif->lock);
 
        complete(&drive->gendev_rel_comp);
 }
@@ -1302,10 +1152,10 @@ out:
 
 static void hwif_register_devices(ide_hwif_t *hwif)
 {
+       ide_drive_t *drive;
        unsigned int i;
 
-       for (i = 0; i < MAX_DRIVES; i++) {
-               ide_drive_t *drive = &hwif->drives[i];
+       ide_port_for_each_dev(i, drive, hwif) {
                struct device *dev = &drive->gendev;
                int ret;
 
@@ -1328,11 +1178,10 @@ static void hwif_register_devices(ide_hwif_t *hwif)
 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;
 
-       for (i = 0; i < MAX_DRIVES; i++) {
-               ide_drive_t *drive = &hwif->drives[i];
-
+       ide_port_for_each_dev(i, drive, hwif) {
                drive->dn = i + hwif->channel * 2;
 
                if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
@@ -1380,6 +1229,8 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
        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
@@ -1387,12 +1238,13 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
 
                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;
-               } else if (d->dma_ops)
-                       hwif->dma_ops = d->dma_ops;
+               }
        }
 
        if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
@@ -1417,6 +1269,66 @@ static void ide_port_cable_detect(ide_hwif_t *hwif)
        }
 }
 
+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;
+
+               memset(drive, 0, sizeof(*drive));
+
+               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.b.recalibrate    = 1;
+               drive->special.b.set_geometry   = 1;
+               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);
+       }
+}
+
+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;
+
+       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, hw_regs_t *hw)
+{
+       memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
+       hwif->irq = hw->irq;
+       hwif->chipset = hw->chipset;
+       hwif->dev = hw->dev;
+       hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
+       hwif->ack_intr = hw->ack_intr;
+       hwif->config_data = hw->config;
+}
+
 static unsigned int ide_indexes;
 
 /**
@@ -1466,12 +1378,43 @@ static void ide_free_port_slot(int 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);
+}
+
+static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
+{
+       int i;
+
+       for (i = 0; i < MAX_DRIVES; i++) {
+               ide_drive_t *drive;
+
+               drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
+               if (drive == NULL)
+                       goto out_nomem;
+
+               hwif->devices[i] = drive;
+       }
+       return 0;
+
+out_nomem:
+       ide_port_free_devices(hwif);
+       return -ENOMEM;
+}
+
 struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
 {
        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(sizeof(*host), GFP_KERNEL);
+       host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
        if (host == NULL)
                return NULL;
 
@@ -1482,10 +1425,15 @@ struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
                if (hws[i] == NULL)
                        continue;
 
-               hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);
+               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",
@@ -1507,8 +1455,7 @@ struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
                return NULL;
        }
 
-       if (hws[0])
-               host->dev[0] = hws[0]->dev;
+       host->dev[0] = dev;
 
        if (d) {
                host->init_chipset = d->init_chipset;
@@ -1525,9 +1472,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
        ide_hwif_t *hwif, *mate = NULL;
        int i, j = 0;
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL) {
                        mate = NULL;
                        continue;
@@ -1553,9 +1498,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                ide_port_init_devices(hwif);
        }
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL)
                        continue;
 
@@ -1570,9 +1513,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                        ide_port_tune_devices(hwif);
        }
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL)
                        continue;
 
@@ -1597,9 +1538,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                        ide_acpi_port_init_devices(hwif);
        }
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL)
                        continue;
 
@@ -1607,9 +1546,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                        hwif_register_devices(hwif);
        }
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL)
                        continue;
 
@@ -1647,17 +1584,85 @@ int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws,
 }
 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_dev(i, drive, hwif) {
+               if (drive->dev_flags & IDE_DFLAG_PRESENT) {
+                       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)
+{
+       BUG_ON(in_interrupt());
+       BUG_ON(irqs_disabled());
+
+       mutex_lock(&ide_cfg_mtx);
+
+       if (hwif->present) {
+               __ide_port_unregister_devices(hwif);
+               hwif->present = 0;
+       }
+
+       ide_proc_unregister_port(hwif);
+
+       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
+        */
+       blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
+       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;
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               hwif = host->ports[i];
-
+       ide_host_for_each_port(i, hwif, host) {
                if (hwif == NULL)
                        continue;
 
+               ide_port_free_devices(hwif);
                ide_free_port_slot(hwif->index);
                kfree(hwif);
        }
@@ -1668,11 +1673,12 @@ EXPORT_SYMBOL_GPL(ide_host_free);
 
 void ide_host_remove(struct ide_host *host)
 {
+       ide_hwif_t *hwif;
        int i;
 
-       for (i = 0; i < MAX_HOST_PORTS; i++) {
-               if (host->ports[i])
-                       ide_unregister(host->ports[i]);
+       ide_host_for_each_port(i, hwif, host) {
+               if (hwif)
+                       ide_unregister(hwif);
        }
 
        ide_host_free(host);
@@ -1691,8 +1697,8 @@ void ide_port_scan(ide_hwif_t *hwif)
        hwif->present = 1;
 
        ide_port_tune_devices(hwif);
-       ide_acpi_port_init_devices(hwif);
        ide_port_setup_devices(hwif);
+       ide_acpi_port_init_devices(hwif);
        hwif_register_devices(hwif);
        ide_proc_port_register_devices(hwif);
 }