From: Webb Scales <web...@hp.com>
Hoist the conditional out of do_not_scan_if_controller_locked_up() and
place it in the caller (this improves the code structure, making it
more consistent with other uses and enabling tail-call optimization);
rename the function to hpsa_scan_complete(), and use it at the end of
hpsa_scan_start() as well.
Reviewed-by: Scott Teel <scott.t...@pmcs.com>
Signed-off-by: Webb Scales <web...@hp.com>
Signed-off-by: Don Brace <don.br...@pmcs.com>
---
drivers/scsi/hpsa.c | 40 ++++++++++++++++------------------------
1 file changed, 16 insertions(+), 24 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 7915dc4..a92653a 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4149,25 +4149,14 @@ static int hpsa_scsi_queue_command(struct Scsi_Host
*sh, struct scsi_cmnd *cmd)
return hpsa_ciss_submit(h, c, cmd, scsi3addr);
}
-static int do_not_scan_if_controller_locked_up(struct ctlr_info *h)
+static void hpsa_scan_complete(struct ctlr_info *h)
{
unsigned long flags;
- /*
- * Don't let rescans be initiated on a controller known
- * to be locked up. If the controller locks up *during*
- * a rescan, that thread is probably hosed, but at least
- * we can prevent new rescan threads from piling up on a
- * locked up controller.
- */
- if (unlikely(lockup_detected(h))) {
- spin_lock_irqsave(&h->scan_lock, flags);
- h->scan_finished = 1;
- wake_up_all(&h->scan_wait_queue);
- spin_unlock_irqrestore(&h->scan_lock, flags);
- return 1;
- }
- return 0;
+ spin_lock_irqsave(&h->scan_lock, flags);
+ h->scan_finished = 1;
+ wake_up_all(&h->scan_wait_queue);
+ spin_unlock_irqrestore(&h->scan_lock, flags);
}
static void hpsa_scan_start(struct Scsi_Host *sh)
@@ -4175,8 +4164,14 @@ static void hpsa_scan_start(struct Scsi_Host *sh)
struct ctlr_info *h = shost_to_hba(sh);
unsigned long flags;
- if (do_not_scan_if_controller_locked_up(h))
- return;
+ /*
+ * Don't let rescans be initiated on a controller known to be locked
+ * up. If the controller locks up *during* a rescan, that thread is
+ * probably hosed, but at least we can prevent new rescan threads from
+ * piling up on a locked up controller.
+ */
+ if (unlikely(lockup_detected(h)))
+ return hpsa_scan_complete(h);
/* wait until any scan already in progress is finished. */
while (1) {
@@ -4194,15 +4189,12 @@ static void hpsa_scan_start(struct Scsi_Host *sh)
h->scan_finished = 0; /* mark scan as in progress */
spin_unlock_irqrestore(&h->scan_lock, flags);
- if (do_not_scan_if_controller_locked_up(h))
- return;
+ if (unlikely(lockup_detected(h)))
+ return hpsa_scan_complete(h);
hpsa_update_scsi_devices(h, h->scsi_host->host_no);
- spin_lock_irqsave(&h->scan_lock, flags);
- h->scan_finished = 1; /* mark scan as finished. */
- wake_up_all(&h->scan_wait_queue);
- spin_unlock_irqrestore(&h->scan_lock, flags);
+ hpsa_scan_complete(h);
}
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
--
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