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| author | Tejun Heo <htejun@gmail.com> | 2008-03-04 11:18:17 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-03-04 11:18:17 +0100 |
| commit | e3790c7d42a545e8fe8b38b513613ca96687b670 (patch) | |
| tree | 0b849ba46007c4d7f7a34271a76d58e7406cbad7 /drivers/ata | |
| parent | 7a85f8896f4b4a4a0249563b92af9e3161a6b467 (diff) | |
| download | linux-e3790c7d42a545e8fe8b38b513613ca96687b670.tar.bz2 | |
block: separate out padding from alignment
Block layer alignment was used for two different purposes - memory
alignment and padding. This causes problems in lower layers because
drivers which only require memory alignment ends up with adjusted
rq->data_len. Separate out padding such that padding occurs iff
driver explicitly requests it.
Tomo: restorethe code to update bio in blk_rq_map_user
introduced by the commit 40b01b9bbdf51ae543a04744283bf2d56c4a6afa
according to padding alignment.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index fe47922dd69e..8f0e8f2bc628 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -862,9 +862,10 @@ static int ata_scsi_dev_config(struct scsi_device *sdev, struct request_queue *q = sdev->request_queue; void *buf; - /* set the min alignment */ + /* set the min alignment and padding */ blk_queue_update_dma_alignment(sdev->request_queue, ATA_DMA_PAD_SZ - 1); + blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1); /* configure draining */ buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); |