[PATCH] convert IDE device drivers to driver-model

* add ide_bus_match() and export ide_bus_type
* split ide_remove_driver_from_hwgroup() out of ide_unregister()
* move device cleanup from ide_unregister() to drive_release_dev()
* convert ide_driver_t->name to driver->name
* convert ide_driver_t->{attach,cleanup} to driver->{probe,remove}
* remove ide_driver_t->busy as ide_bus_type->subsys.rwsem
  protects against concurrent ->{probe,remove} calls
* make ide_{un}register_driver() void as it cannot fail now
* use driver_{un}register() directly, remove ide_{un}register_driver()
* use device_register() instead of ata_attach(), remove ata_attach()
* add proc_print_driver() and ide_drivers_show(), remove ide_drivers_op
* fix ide_replace_subdriver() and move it to ide-proc.c
* remove ide_driver_t->drives, ide_drives and drives_lock
* remove ide_driver_t->drivers, drivers and drivers_lock
* remove ide_drive_t->driver and DRIVER() macro

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>

1 files changed, 44 insertions, 3 deletions

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 554473a95cf..53b84a84f6c 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -47,6 +47,7 @@
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/ide.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/spinlock.h>
 #include <linux/kmod.h>
 #include <linux/pci.h>
@@ -918,7 +919,7 @@ int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)
                            want them on default or a new "empty" class
                            for hotplug reprobing ? */
                         if (drive->present) {
-                                ata_attach(drive);
+                                device_register(&drive->gendev);
                         }
                 }
         }
@@ -1279,10 +1280,51 @@ 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);
 
+        spin_lock_irq(&ide_lock);
+        if (drive->devfs_name[0] != '\0') {
+                devfs_remove(drive->devfs_name);
+                drive->devfs_name[0] = '\0';
+        }
+        ide_remove_drive_from_hwgroup(drive);
+        if (drive->id != NULL) {
+                kfree(drive->id);
+                drive->id = NULL;
+        }
+        drive->present = 0;
+        /* Messed up locking ... */
+        spin_unlock_irq(&ide_lock);
+        blk_cleanup_queue(drive->queue);
+        spin_lock_irq(&ide_lock);
+        drive->queue = NULL;
+        spin_unlock_irq(&ide_lock);
+
         up(&drive->gendev_rel_sem);
 }
 
@@ -1306,7 +1348,6 @@ static void init_gendisk (ide_hwif_t *hwif)
                 drive->gendev.driver_data = drive;
                 drive->gendev.release = drive_release_dev;
                 if (drive->present) {
-                        device_register(&drive->gendev);
                         sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d",
                                 (hwif->channel && hwif->mate) ?
                                 hwif->mate->index : hwif->index,
@@ -1412,7 +1453,7 @@ int ideprobe_init (void)
                                 hwif->chipset = ide_generic;
                         for (unit = 0; unit < MAX_DRIVES; ++unit)
                                 if (hwif->drives[unit].present)
-                                        ata_attach(&hwif->drives[unit]);
+                                        device_register(&hwif->drives[unit].gendev);
                 }
         }
         return 0;