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Subject[033/165] SATA: enable non-queueable flush flag
2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------
Content-Length: 1988
Lines: 66
From: "shaohua.li@intel.com" <shaohua.li@intel.com>

commit 900e599eb0c16390ff671652a44e0ea90532220e upstream.

Enable non-queueable flush flag for SATA.

Stable: 2.6.39 only

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/ata/libata-scsi.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1089,21 +1089,21 @@ static int atapi_drain_needed(struct req
static int ata_scsi_dev_config(struct scsi_device *sdev,
struct ata_device *dev)
{
+ struct request_queue *q = sdev->request_queue;
+
if (!ata_id_has_unload(dev->id))
dev->flags |= ATA_DFLAG_NO_UNLOAD;

/* configure max sectors */
- blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
+ blk_queue_max_hw_sectors(q, dev->max_sectors);

if (dev->class == ATA_DEV_ATAPI) {
- struct request_queue *q = sdev->request_queue;
void *buf;

sdev->sector_size = ATA_SECT_SIZE;

/* set DMA padding */
- blk_queue_update_dma_pad(sdev->request_queue,
- ATA_DMA_PAD_SZ - 1);
+ blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);

/* configure draining */
buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
@@ -1131,8 +1131,7 @@ static int ata_scsi_dev_config(struct sc
"sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
sdev->sector_size);

- blk_queue_update_dma_alignment(sdev->request_queue,
- sdev->sector_size - 1);
+ blk_queue_update_dma_alignment(q, sdev->sector_size - 1);

if (dev->flags & ATA_DFLAG_AN)
set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
@@ -1145,6 +1144,8 @@ static int ata_scsi_dev_config(struct sc
scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
}

+ blk_queue_flush_queueable(q, false);
+
dev->sdev = sdev;
return 0;
}



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