diff options
| author | Webb Scales <webbnh@hp.com> | 2015-01-23 23:44:50 +0100 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2015-02-02 18:57:43 +0100 |
| commit | 8ebc92483211f49ee5f072d2e51de3e70ca05fc1 (patch) | |
| tree | e41256b2ea640d0e7dbd039bdcc63eba6ae0cb9d /drivers | |
| parent | hpsa: move SG descriptor set-up out of hpsa_scatter_gather() (diff) | |
| download | linux-8ebc92483211f49ee5f072d2e51de3e70ca05fc1.tar.xz linux-8ebc92483211f49ee5f072d2e51de3e70ca05fc1.zip | |
hpsa: refactor duplicated scan completion code into a new routine
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.teel@pmcs.com>
Signed-off-by: Webb Scales <webbnh@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/hpsa.c | 40 |
1 files changed, 16 insertions, 24 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 7915dc45a37c..a92653a18bd2 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) |