diff options
| author | Don Brace <don.brace@pmcs.com> | 2015-01-23 23:43:51 +0100 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2015-02-02 18:57:41 +0100 |
| commit | bee266a6d572b231643a486bec11fc5ac370d779 (patch) | |
| tree | 2907719c4b6e97f27fe0b72efe47d896ecd32482 /drivers/scsi | |
| parent | hpsa: count passthru cmds with atomics, not a spin locked int (diff) | |
| download | linux-bee266a6d572b231643a486bec11fc5ac370d779.tar.xz linux-bee266a6d572b231643a486bec11fc5ac370d779.zip | |
hpsa: slightly optimize SA5_performant_completed
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/hpsa.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index 1856445f883a..aa6cb0b0b427 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -412,19 +412,19 @@ static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q) unsigned long register_value = FIFO_EMPTY; /* msi auto clears the interrupt pending bit. */ - if (!(h->msi_vector || h->msix_vector)) { + if (unlikely(!(h->msi_vector || h->msix_vector))) { /* flush the controller write of the reply queue by reading * outbound doorbell status register. */ - register_value = readl(h->vaddr + SA5_OUTDB_STATUS); + (void) readl(h->vaddr + SA5_OUTDB_STATUS); writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR); /* Do a read in order to flush the write to the controller * (as per spec.) */ - register_value = readl(h->vaddr + SA5_OUTDB_STATUS); + (void) readl(h->vaddr + SA5_OUTDB_STATUS); } - if ((rq->head[rq->current_entry] & 1) == rq->wraparound) { + if ((((u32) rq->head[rq->current_entry]) & 1) == rq->wraparound) { register_value = rq->head[rq->current_entry]; rq->current_entry++; atomic_dec(&h->commands_outstanding); |