diff options
| -rw-r--r-- | drivers/ide/ide-io.c | 12 | ||||
| -rw-r--r-- | drivers/ide/ide-probe.c | 90 | ||||
| -rw-r--r-- | include/linux/ide.h | 13 |
3 files changed, 15 insertions, 100 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 1fc739f44154..4ce793c05629 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -742,12 +742,12 @@ repeat: * set nIEN for previous port, drives in the * quirk_list may not like intr setups/cleanups */ - if (prev_port && hwgroup->drive->quirk_list == 0) + if (prev_port && hwgroup->cur_dev->quirk_list == 0) prev_port->tp_ops->set_irq(prev_port, 0); hwif->host->cur_port = hwif; } - hwgroup->drive = drive; + hwgroup->cur_dev = drive; drive->dev_flags &= ~(IDE_DFLAG_SLEEPING | IDE_DFLAG_PARKED); spin_unlock_irq(&hwgroup->lock); @@ -913,9 +913,9 @@ void ide_timer_expiry (unsigned long data) * Either way, we don't really want to complain about anything. */ } else { - drive = hwgroup->drive; + drive = hwgroup->cur_dev; if (!drive) { - printk(KERN_ERR "ide_timer_expiry: hwgroup->drive was NULL\n"); + printk(KERN_ERR "%s: ->cur_dev was NULL\n", __func__); hwgroup->handler = NULL; } else { ide_hwif_t *hwif; @@ -1033,7 +1033,7 @@ static void unexpected_intr(int irq, ide_hwif_t *hwif) * places * * hwif is the interface in the group currently performing - * a command. hwgroup->drive is the drive and hwgroup->handler is + * a command. hwgroup->cur_dev is the drive and hwgroup->handler is * the IRQ handler to call. As we issue a command the handlers * step through multiple states, reassigning the handler to the * next step in the process. Unlike a smart SCSI controller IDE @@ -1105,7 +1105,7 @@ irqreturn_t ide_intr (int irq, void *dev_id) goto out; } - drive = hwgroup->drive; + drive = hwgroup->cur_dev; if (!drive) { /* * This should NEVER happen, and there isn't much diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 2752509531b7..68f3c87b8284 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -918,27 +918,9 @@ 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); -} - /* * For any present drive: * - allocate the block device queue - * - link drive into the hwgroup */ static int ide_port_setup_devices(ide_hwif_t *hwif) { @@ -961,8 +943,6 @@ static int ide_port_setup_devices(ide_hwif_t *hwif) } j++; - - ide_add_drive_to_hwgroup(drive); } mutex_unlock(&ide_cfg_mtx); @@ -978,33 +958,9 @@ void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 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); + /* Free the hwgroup if we were the only member. */ + if (--hwgroup->port_count == 0) 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); } @@ -1044,20 +1000,9 @@ static int init_irq (ide_hwif_t *hwif) 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); + hwgroup->port_count++; spin_unlock_irq(&hwgroup->lock); } else { hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, @@ -1068,7 +1013,8 @@ static int init_irq (ide_hwif_t *hwif) spin_lock_init(&hwgroup->lock); hwif->hwgroup = hwgroup; - hwgroup->hwif = hwif->next = hwif; + + hwgroup->port_count = 1; init_timer(&hwgroup->timer); hwgroup->timer.function = &ide_timer_expiry; @@ -1191,29 +1137,6 @@ 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); @@ -1222,7 +1145,6 @@ static void drive_release_dev (struct device *dev) ide_proc_unregister_device(drive); spin_lock_irq(&hwgroup->lock); - ide_remove_drive_from_hwgroup(drive); kfree(drive->id); drive->id = NULL; drive->dev_flags &= ~IDE_DFLAG_PRESENT; diff --git a/include/linux/ide.h b/include/linux/ide.h index f5382ad0bd4c..8b74ccdd221c 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -588,7 +588,6 @@ struct ide_drive_s { struct request_queue *queue; /* request queue */ struct request *rq; /* current request */ - struct ide_drive_s *next; /* circular list of hwgroup drives */ void *driver_data; /* extra driver data */ u16 *id; /* identification info */ #ifdef CONFIG_IDE_PROC_FS @@ -750,7 +749,6 @@ struct ide_dma_ops { struct ide_host; typedef struct hwif_s { - struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ struct hwif_s *mate; /* other hwif from same PCI chip */ struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */ struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ @@ -874,9 +872,7 @@ typedef struct hwgroup_s { unsigned int polling : 1; /* current drive */ - ide_drive_t *drive; - /* ptr to current hwif in linked-list */ - ide_hwif_t *hwif; + ide_drive_t *cur_dev; /* current request */ struct request *rq; @@ -892,6 +888,8 @@ typedef struct hwgroup_s { int req_gen_timer; spinlock_t lock; + + int port_count; } ide_hwgroup_t; typedef struct ide_driver_s ide_driver_t; @@ -1622,12 +1620,7 @@ extern struct mutex ide_cfg_mtx; /* * Structure locking: * - * ide_cfg_mtx and hwgroup->lock together protect changes to - * ide_hwif_t->next - * ide_drive_t->next - * * ide_hwgroup_t->busy: hwgroup->lock - * ide_hwgroup_t->hwif: hwgroup->lock * ide_hwif_t->{hwgroup,mate}: constant, no locking * ide_drive_t->hwif: constant, no locking */ |