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[SCSI] lpfc 8.2.2 : Fix locking around HBA's port_list

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Cleans up a lot of bad behaviors that have been in this area a while

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Smart
2007-08-02 11:09:51 -04:00
committed by James Bottomley
parent a58cbd5212
commit 549e55cd2a
10 changed files with 307 additions and 222 deletions
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41
drivers/scsi/lpfc/lpfc_vport.c
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@@ -176,16 +176,21 @@ static int
lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
{
struct lpfc_vport *vport;
unsigned long flags;
spin_lock_irqsave(&phba->hbalock, flags);
list_for_each_entry(vport, &phba->port_list, listentry) {
if (vport == new_vport)
continue;
/* If they match, return not unique */
if (memcmp(&vport->fc_sparam.portName,
&new_vport->fc_sparam.portName,
sizeof(struct lpfc_name)) == 0)
&new_vport->fc_sparam.portName,
sizeof(struct lpfc_name)) == 0) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return 0;
}
}
spin_unlock_irqrestore(&phba->hbalock, flags);
return 1;
}
@@ -524,6 +529,36 @@ out:
return rc;
}
EXPORT_SYMBOL(lpfc_vport_create);
EXPORT_SYMBOL(lpfc_vport_delete);
struct lpfc_vport **
lpfc_create_vport_work_array(struct lpfc_hba *phba)
{
struct lpfc_vport *port_iterator;
struct lpfc_vport **vports;
int index = 0;
vports = kzalloc(LPFC_MAX_VPORTS * sizeof(struct lpfc_vport *),
GFP_KERNEL);
if (vports == NULL)
return NULL;
spin_lock_irq(&phba->hbalock);
list_for_each_entry(port_iterator, &phba->port_list, listentry) {
if (!scsi_host_get(lpfc_shost_from_vport(port_iterator)))
continue;
vports[index++] = port_iterator;
}
spin_unlock_irq(&phba->hbalock);
return vports;
}
void
lpfc_destroy_vport_work_array(struct lpfc_vport **vports)
{
int i;
if (vports == NULL)
return;
for (i=0; vports[i] != NULL && i < LPFC_MAX_VPORTS; i++)
scsi_host_put(lpfc_shost_from_vport(vports[i]));
kfree(vports);
}