#include <linux/init.h>
#include <linux/completion.h>
#include <linux/transport_class.h>
+#include <linux/platform_device.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
switch (oldstate) {
case SHOST_CREATED:
case SHOST_RUNNING:
+ case SHOST_CANCEL_RECOVERY:
break;
default:
goto illegal;
case SHOST_DEL:
switch (oldstate) {
case SHOST_CANCEL:
+ case SHOST_DEL_RECOVERY:
break;
default:
goto illegal;
}
break;
+ case SHOST_CANCEL_RECOVERY:
+ switch (oldstate) {
+ case SHOST_CANCEL:
+ case SHOST_RECOVERY:
+ break;
+ default:
+ goto illegal;
+ }
+ break;
+
+ case SHOST_DEL_RECOVERY:
+ switch (oldstate) {
+ case SHOST_CANCEL_RECOVERY:
+ break;
+ default:
+ goto illegal;
+ }
+ break;
}
shost->shost_state = state;
return 0;
illegal:
SCSI_LOG_ERROR_RECOVERY(1,
- dev_printk(KERN_ERR, &shost->shost_gendev,
- "Illegal host state transition"
- "%s->%s\n",
- scsi_host_state_name(oldstate),
- scsi_host_state_name(state)));
+ shost_printk(KERN_ERR, shost,
+ "Illegal host state transition"
+ "%s->%s\n",
+ scsi_host_state_name(oldstate),
+ scsi_host_state_name(state)));
return -EINVAL;
}
EXPORT_SYMBOL(scsi_host_set_state);
**/
void scsi_remove_host(struct Scsi_Host *shost)
{
- down(&shost->scan_mutex);
- scsi_host_set_state(shost, SHOST_CANCEL);
- up(&shost->scan_mutex);
+ unsigned long flags;
+ mutex_lock(&shost->scan_mutex);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_set_state(shost, SHOST_CANCEL))
+ if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ mutex_unlock(&shost->scan_mutex);
+ return;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ mutex_unlock(&shost->scan_mutex);
scsi_forget_host(shost);
scsi_proc_host_rm(shost);
- scsi_host_set_state(shost, SHOST_DEL);
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (scsi_host_set_state(shost, SHOST_DEL))
+ BUG_ON(scsi_host_set_state(shost, SHOST_DEL_RECOVERY));
+ spin_unlock_irqrestore(shost->host_lock, flags);
transport_unregister_device(&shost->shost_gendev);
class_device_unregister(&shost->shost_classdev);
device_del(&shost->shost_gendev);
+ scsi_proc_hostdir_rm(shost->hostt);
}
EXPORT_SYMBOL(scsi_remove_host);
kthread_stop(shost->ehandler);
if (shost->work_q)
destroy_workqueue(shost->work_q);
+ if (shost->uspace_req_q) {
+ kfree(shost->uspace_req_q->queuedata);
+ scsi_free_queue(shost->uspace_req_q);
+ }
- scsi_proc_hostdir_rm(shost->hostt);
scsi_destroy_command_freelist(shost);
+ if (shost->bqt)
+ blk_free_tags(shost->bqt);
+
kfree(shost->shost_data);
if (parent)
struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
{
struct Scsi_Host *shost;
- int gfp_mask = GFP_KERNEL, rval;
+ gfp_t gfp_mask = GFP_KERNEL;
+ int rval;
if (sht->unchecked_isa_dma && privsize)
gfp_mask |= __GFP_DMA;
- /* Check to see if this host has any error handling facilities */
- if (!sht->eh_strategy_handler && !sht->eh_abort_handler &&
- !sht->eh_device_reset_handler && !sht->eh_bus_reset_handler &&
- !sht->eh_host_reset_handler) {
- printk(KERN_ERR "ERROR: SCSI host `%s' has no error handling\n"
- "ERROR: This is not a safe way to run your "
- "SCSI host\n"
- "ERROR: The error handling must be added to "
- "this driver\n", sht->proc_name);
- dump_stack();
- }
-
- shost = kmalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);
+ shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);
if (!shost)
return NULL;
- memset(shost, 0, sizeof(struct Scsi_Host) + privsize);
- spin_lock_init(&shost->default_lock);
- scsi_assign_lock(shost, &shost->default_lock);
+ shost->host_lock = &shost->default_lock;
+ spin_lock_init(shost->host_lock);
shost->shost_state = SHOST_CREATED;
INIT_LIST_HEAD(&shost->__devices);
INIT_LIST_HEAD(&shost->__targets);
INIT_LIST_HEAD(&shost->starved_list);
init_waitqueue_head(&shost->host_wait);
- init_MUTEX(&shost->scan_mutex);
+ mutex_init(&shost->scan_mutex);
shost->host_no = scsi_host_next_hn++; /* XXX(hch): still racy */
shost->dma_channel = 0xff;
shost->cmd_per_lun = sht->cmd_per_lun;
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
shost->use_clustering = sht->use_clustering;
- shost->ordered_flush = sht->ordered_flush;
shost->ordered_tag = sht->ordered_tag;
- /*
- * hosts/devices that do queueing must support ordered tags
- */
- if (shost->can_queue > 1 && shost->ordered_flush) {
- printk(KERN_ERR "scsi: ordered flushes don't support queueing\n");
- shost->ordered_flush = 0;
- }
-
if (sht->max_host_blocked)
shost->max_host_blocked = sht->max_host_blocked;
else
struct class_device *cdev;
struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p;
- down_read(&class->subsys.rwsem);
+ down(&class->sem);
list_for_each_entry(cdev, &class->children, node) {
p = class_to_shost(cdev);
if (p->host_no == hostnum) {
break;
}
}
- up_read(&class->subsys.rwsem);
+ up(&class->sem);
return shost;
}
* @work: Work to queue for execution.
*
* Return value:
- * 0 on success / != 0 for error
+ * 1 - work queued for execution
+ * 0 - work is already queued
+ * -EINVAL - work queue doesn't exist
**/
int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff