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[SCSI] libsas: Add SAS_HA state flags to avoid queueing events while unloading

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Track sas_ha_struct state so that we ignore events that come in while
we're shutting things down.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Darrick J. Wong 2007-01-11 14:15:43 -08:00 • committed by James Bottomley
parent 980fa2f9d6
commit 6b0efb8516
5 changed files with 31 additions and 6 deletions
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12
drivers/scsi/libsas/sas_init.c
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@ -87,6 +87,9 @@ int sas_register_ha(struct sas_ha_struct *sas_ha)
else if (sas_ha->lldd_queue_size == -1)
sas_ha->lldd_queue_size = 128; /* Sanity */
sas_ha->state = SAS_HA_REGISTERED;
spin_lock_init(&sas_ha->state_lock);
error = sas_register_phys(sas_ha);
if (error) {
printk(KERN_NOTICE "couldn't register sas phys:%d\n", error);
@ -127,6 +130,15 @@ Undo_phys:
int sas_unregister_ha(struct sas_ha_struct *sas_ha)
{
unsigned long flags;
/* Set the state to unregistered to avoid further
* events to be queued */
spin_lock_irqsave(&sas_ha->state_lock, flags);
sas_ha->state = SAS_HA_UNREGISTERED;
spin_unlock_irqrestore(&sas_ha->state_lock, flags);
scsi_flush_work(sas_ha->core.shost);
sas_unregister_ports(sas_ha);
if (sas_ha->lldd_max_execute_num > 1) {