diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-06-27 02:47:35 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-06-27 02:50:08 -0400 |
| commit | e00f1ff3c8977eff07d0214d2f3478ac947bda0f (patch) | |
| tree | 1209cd341d4be66b319d2779ffb91d0b5988e42f | |
| parent | 914616a3c2a54504f3b0eda0b67fcd32226b3e83 (diff) | |
libata: call ata_check_atapi_dma() with qc better prepared
In atapi_xlat(), prepare qc better before calling
ata_check_atapi_dma() such that ata_check_atapi_dma() can use info
from qc. While at it, reformat weird looking if/else block in the
function.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
| -rw-r--r-- | drivers/ata/libata-scsi.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index c228df298bd..4ddf00c8c5f 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2384,11 +2384,6 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) int using_pio = (dev->flags & ATA_DFLAG_PIO); int nodata = (scmd->sc_data_direction == DMA_NONE); - if (!using_pio) - /* Check whether ATAPI DMA is safe */ - if (ata_check_atapi_dma(qc)) - using_pio = 1; - memset(qc->cdb, 0, dev->cdb_len); memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); @@ -2401,19 +2396,22 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) } qc->tf.command = ATA_CMD_PACKET; + qc->nbytes = scmd->request_bufflen; + + /* check whether ATAPI DMA is safe */ + if (!using_pio && ata_check_atapi_dma(qc)) + using_pio = 1; - /* no data, or PIO data xfer */ if (using_pio || nodata) { + /* no data, or PIO data xfer */ if (nodata) qc->tf.protocol = ATA_PROT_ATAPI_NODATA; else qc->tf.protocol = ATA_PROT_ATAPI; qc->tf.lbam = (8 * 1024) & 0xff; qc->tf.lbah = (8 * 1024) >> 8; - } - - /* DMA data xfer */ - else { + } else { + /* DMA data xfer */ qc->tf.protocol = ATA_PROT_ATAPI_DMA; qc->tf.feature |= ATAPI_PKT_DMA; @@ -2422,8 +2420,6 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) qc->tf.feature |= ATAPI_DMADIR; } - qc->nbytes = scmd->request_bufflen; - return 0; } |