[SCSI] lpfc 8.2.2 : Fix locking around HBA's port_list
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>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 07bd0dc..484070c 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -437,16 +437,18 @@
int
lpfc_hba_down_prep(struct lpfc_hba *phba)
{
- struct lpfc_vport *vport = phba->pport;
+ struct lpfc_vport **vports;
+ int i;
/* Disable interrupts */
writel(0, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
- list_for_each_entry(vport, &phba->port_list, listentry) {
- lpfc_cleanup_discovery_resources(vport);
- }
-
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
+ lpfc_cleanup_discovery_resources(vports[i]);
+ lpfc_destroy_vport_work_array(vports);
return 0;
}
@@ -615,9 +617,10 @@
struct lpfc_vport *vport = phba->pport;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
- struct lpfc_vport *port_iterator;
+ struct lpfc_vport **vports;
uint32_t event_data;
struct Scsi_Host *shost;
+ int i;
/* If the pci channel is offline, ignore possible errors,
* since we cannot communicate with the pci card anyway. */
@@ -632,14 +635,17 @@
"Data: x%x x%x x%x\n",
phba->brd_no, phba->work_hs,
phba->work_status[0], phba->work_status[1]);
- list_for_each_entry(port_iterator, &phba->port_list,
- listentry) {
- shost = lpfc_shost_from_vport(port_iterator);
-
- spin_lock_irq(shost->host_lock);
- port_iterator->fc_flag |= FC_ESTABLISH_LINK;
- spin_unlock_irq(shost->host_lock);
- }
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0;
+ i < LPFC_MAX_VPORTS && vports[i] != NULL;
+ i++){
+ shost = lpfc_shost_from_vport(vports[i]);
+ spin_lock_irq(shost->host_lock);
+ vports[i]->fc_flag |= FC_ESTABLISH_LINK;
+ spin_unlock_irq(shost->host_lock);
+ }
+ lpfc_destroy_vport_work_array(vports);
spin_lock_irq(&phba->hbalock);
psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
spin_unlock_irq(&phba->hbalock);
@@ -708,7 +714,6 @@
{
struct lpfc_vport *vport = phba->pport;
struct lpfc_sli *psli = &phba->sli;
- struct lpfc_vport *port_iterator;
LPFC_MBOXQ_t *pmb;
volatile uint32_t control;
struct lpfc_dmabuf *mp;
@@ -729,8 +734,7 @@
rc = -EIO;
/* Cleanup any outstanding ELS commands */
- list_for_each_entry(port_iterator, &phba->port_list, listentry)
- lpfc_els_flush_cmd(port_iterator);
+ lpfc_els_flush_all_cmd(phba);
psli->slistat.link_event++;
lpfc_read_la(phba, pmb, mp);
@@ -1313,22 +1317,26 @@
lpfc_establish_link_tmo(unsigned long ptr)
{
struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
- struct lpfc_vport *vport = phba->pport;
+ struct lpfc_vport **vports;
unsigned long iflag;
+ int i;
/* Re-establishing Link, timer expired */
lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
"%d:1300 Re-establishing Link, timer expired "
"Data: x%x x%x\n",
- phba->brd_no, vport->fc_flag,
- vport->port_state);
- list_for_each_entry(vport, &phba->port_list, listentry) {
- struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
-
- spin_lock_irqsave(shost->host_lock, iflag);
- vport->fc_flag &= ~FC_ESTABLISH_LINK;
- spin_unlock_irqrestore(shost->host_lock, iflag);
- }
+ phba->brd_no, phba->pport->fc_flag,
+ phba->pport->port_state);
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
+ struct Scsi_Host *shost;
+ shost = lpfc_shost_from_vport(vports[i]);
+ spin_lock_irqsave(shost->host_lock, iflag);
+ vports[i]->fc_flag &= ~FC_ESTABLISH_LINK;
+ spin_unlock_irqrestore(shost->host_lock, iflag);
+ }
+ lpfc_destroy_vport_work_array(vports);
}
void
@@ -1343,12 +1351,16 @@
static void
lpfc_stop_phba_timers(struct lpfc_hba *phba)
{
- struct lpfc_vport *vport;
+ struct lpfc_vport **vports;
+ int i;
del_timer_sync(&phba->fcp_poll_timer);
del_timer_sync(&phba->fc_estabtmo);
- list_for_each_entry(vport, &phba->port_list, listentry)
- lpfc_stop_vport_timers(vport);
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
+ lpfc_stop_vport_timers(vports[i]);
+ lpfc_destroy_vport_work_array(vports);
del_timer_sync(&phba->sli.mbox_tmo);
del_timer_sync(&phba->fabric_block_timer);
phba->hb_outstanding = 0;
@@ -1360,6 +1372,8 @@
lpfc_online(struct lpfc_hba *phba)
{
struct lpfc_vport *vport = phba->pport;
+ struct lpfc_vport **vports;
+ int i;
if (!phba)
return 0;
@@ -1383,14 +1397,18 @@
return 1;
}
- list_for_each_entry(vport, &phba->port_list, listentry) {
- struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
- spin_lock_irq(shost->host_lock);
- vport->fc_flag &= ~FC_OFFLINE_MODE;
- if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
- vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
- spin_unlock_irq(shost->host_lock);
- }
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
+ struct Scsi_Host *shost;
+ shost = lpfc_shost_from_vport(vports[i]);
+ spin_lock_irq(shost->host_lock);
+ vports[i]->fc_flag &= ~FC_OFFLINE_MODE;
+ if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
+ vports[i]->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+ spin_unlock_irq(shost->host_lock);
+ }
+ lpfc_destroy_vport_work_array(vports);
lpfc_unblock_mgmt_io(phba);
return 0;
@@ -1440,39 +1458,35 @@
void
lpfc_offline(struct lpfc_hba *phba)
{
- struct lpfc_vport *vport = phba->pport;
- struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
- struct lpfc_vport *port_iterator;
+ struct Scsi_Host *shost;
+ struct lpfc_vport **vports;
+ int i;
- if (vport->fc_flag & FC_OFFLINE_MODE)
+ if (phba->pport->fc_flag & FC_OFFLINE_MODE)
return;
/* stop all timers associated with this hba */
lpfc_stop_phba_timers(phba);
- list_for_each_entry(port_iterator, &phba->port_list, listentry) {
- port_iterator->work_port_events = 0;
- }
-
lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
"%d:0460 Bring Adapter offline\n",
phba->brd_no);
-
/* Bring down the SLI Layer and cleanup. The HBA is offline
now. */
lpfc_sli_hba_down(phba);
spin_lock_irq(&phba->hbalock);
phba->work_ha = 0;
- vport->fc_flag |= FC_OFFLINE_MODE;
spin_unlock_irq(&phba->hbalock);
- list_for_each_entry(port_iterator, &phba->port_list, listentry) {
- shost = lpfc_shost_from_vport(port_iterator);
-
- lpfc_cleanup(port_iterator);
- spin_lock_irq(shost->host_lock);
- vport->work_port_events = 0;
- vport->fc_flag |= FC_OFFLINE_MODE;
- spin_unlock_irq(shost->host_lock);
- }
+ vports = lpfc_create_vport_work_array(phba);
+ if (vports != NULL)
+ for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
+ shost = lpfc_shost_from_vport(vports[i]);
+ lpfc_cleanup(vports[i]);
+ spin_lock_irq(shost->host_lock);
+ vports[i]->work_port_events = 0;
+ vports[i]->fc_flag |= FC_OFFLINE_MODE;
+ spin_unlock_irq(shost->host_lock);
+ }
+ lpfc_destroy_vport_work_array(vports);
}
/******************************************************************************
@@ -1509,7 +1523,6 @@
return 0;
}
-
struct lpfc_vport *
lpfc_create_port(struct lpfc_hba *phba, int instance, struct fc_vport *fc_vport)
{
@@ -1570,7 +1583,9 @@
if (error)
goto out_put_shost;
+ spin_lock_irq(&phba->hbalock);
list_add_tail(&vport->listentry, &phba->port_list);
+ spin_unlock_irq(&phba->hbalock);
return vport;
out_put_shost:
@@ -1990,8 +2005,10 @@
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_vport *port_iterator;
+ spin_lock_irq(&phba->hbalock);
list_for_each_entry(port_iterator, &phba->port_list, listentry)
port_iterator->load_flag |= FC_UNLOADING;
+ spin_unlock_irq(&phba->hbalock);
kfree(vport->vname);
lpfc_free_sysfs_attr(vport);
@@ -2012,7 +2029,6 @@
list_del_init(&vport->listentry);
spin_unlock_irq(&phba->hbalock);
-
lpfc_debugfs_terminate(vport);
lpfc_cleanup(vport);