[SCSI] hpsa: take the adapter lock in hpsa_wait_for_mode_change_ack
Need to take the lock while accessing the register to check to
see if config table changes have taken effect.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 5b9cd41d..4fb62c2 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3553,13 +3553,18 @@
static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
{
int i;
+ u32 doorbell_value;
+ unsigned long flags;
/* under certain very rare conditions, this can take awhile.
* (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
* as we enter this code.)
*/
for (i = 0; i < MAX_CONFIG_WAIT; i++) {
- if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
+ spin_lock_irqsave(&h->lock, flags);
+ doorbell_value = readl(h->vaddr + SA5_DOORBELL);
+ spin_unlock_irqrestore(&h->lock, flags);
+ if (!doorbell_value & CFGTBL_ChangeReq)
break;
/* delay and try again */
msleep(10);
@@ -3731,6 +3736,8 @@
h->busy_initializing = 1;
INIT_HLIST_HEAD(&h->cmpQ);
INIT_HLIST_HEAD(&h->reqQ);
+ spin_lock_init(&h->lock);
+ spin_lock_init(&h->scan_lock);
rc = hpsa_pci_init(h);
if (rc != 0)
goto clean1;
@@ -3790,8 +3797,6 @@
}
if (hpsa_allocate_sg_chain_blocks(h))
goto clean4;
- spin_lock_init(&h->lock);
- spin_lock_init(&h->scan_lock);
init_waitqueue_head(&h->scan_wait_queue);
h->scan_finished = 1; /* no scan currently in progress */