diff options
Diffstat (limited to 'drivers/ata')
| -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; } |