void
zvol_fini(void)
{
zvol_remove_minors(NULL);
blk_unregister_region(MKDEV(zvol_major, 0), 1UL << MINORBITS);
unregister_blkdev(zvol_major, ZVOL_DRIVER);
mutex_destroy(&zvol_state_lock);
list_destroy(&zvol_state_list);
}
void unlink_gendisk(struct gendisk *disk)
{
blk_unregister_queue(disk);
blk_unregister_region(MKDEV(disk->major, disk->first_minor),
disk->minors);
}
void ide_unregister(unsigned int index)
{
ide_drive_t *drive;
ide_hwif_t *hwif, *g;
static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
ide_hwgroup_t *hwgroup;
int irq_count = 0, unit;
BUG_ON(index >= MAX_HWIFS);
BUG_ON(in_interrupt());
BUG_ON(irqs_disabled());
down(&ide_cfg_sem);
spin_lock_irq(&ide_lock);
hwif = &ide_hwifs[index];
if (!hwif->present)
goto abort;
for (unit = 0; unit < MAX_DRIVES; ++unit) {
drive = &hwif->drives[unit];
if (!drive->present)
continue;
spin_unlock_irq(&ide_lock);
device_unregister(&drive->gendev);
wait_for_completion(&drive->gendev_rel_comp);
spin_lock_irq(&ide_lock);
}
hwif->present = 0;
spin_unlock_irq(&ide_lock);
ide_proc_unregister_port(hwif);
hwgroup = hwif->hwgroup;
/*
* free the irq if we were the only hwif using it
*/
g = hwgroup->hwif;
do {
if (g->irq == hwif->irq)
++irq_count;
g = g->next;
} while (g != hwgroup->hwif);
if (irq_count == 1)
free_irq(hwif->irq, hwgroup);
spin_lock_irq(&ide_lock);
/*
* Note that we only release the standard ports,
* and do not even try to handle any extra ports
* allocated for weird IDE interface chipsets.
*/
ide_hwif_release_regions(hwif);
/*
* 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.
*/
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);
}
/* More messed up locking ... */
spin_unlock_irq(&ide_lock);
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);
spin_lock_irq(&ide_lock);
if (hwif->dma_base) {
(void) ide_release_dma(hwif);
hwif->dma_base = 0;
hwif->dma_master = 0;
hwif->dma_command = 0;
hwif->dma_vendor1 = 0;
hwif->dma_status = 0;
hwif->dma_vendor3 = 0;
hwif->dma_prdtable = 0;
hwif->extra_base = 0;
hwif->extra_ports = 0;
}
/* copy original settings */
tmp_hwif = *hwif;
/* restore hwif data to pristine status */
init_hwif_data(hwif, index);
init_hwif_default(hwif, index);
ide_hwif_restore(hwif, &tmp_hwif);
abort:
spin_unlock_irq(&ide_lock);
up(&ide_cfg_sem);
}
