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path: root/drivers/ata/libata-scsi.c
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Diffstat (limited to 'drivers/ata/libata-scsi.c')
-rw-r--r--drivers/ata/libata-scsi.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 2e6e1622dc6..57a43649a46 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2343,8 +2343,8 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2343{ 2343{
2344 struct scsi_cmnd *scmd = qc->scsicmd; 2344 struct scsi_cmnd *scmd = qc->scsicmd;
2345 struct ata_device *dev = qc->dev; 2345 struct ata_device *dev = qc->dev;
2346 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2347 int nodata = (scmd->sc_data_direction == DMA_NONE); 2346 int nodata = (scmd->sc_data_direction == DMA_NONE);
2347 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2348 unsigned int nbytes; 2348 unsigned int nbytes;
2349 2349
2350 memset(qc->cdb, 0, dev->cdb_len); 2350 memset(qc->cdb, 0, dev->cdb_len);
@@ -2362,7 +2362,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2362 ata_qc_set_pc_nbytes(qc); 2362 ata_qc_set_pc_nbytes(qc);
2363 2363
2364 /* check whether ATAPI DMA is safe */ 2364 /* check whether ATAPI DMA is safe */
2365 if (!using_pio && ata_check_atapi_dma(qc)) 2365 if (!nodata && !using_pio && atapi_check_dma(qc))
2366 using_pio = 1; 2366 using_pio = 1;
2367 2367
2368 /* Some controller variants snoop this value for Packet 2368 /* Some controller variants snoop this value for Packet
@@ -2402,13 +2402,11 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2402 qc->tf.lbam = (nbytes & 0xFF); 2402 qc->tf.lbam = (nbytes & 0xFF);
2403 qc->tf.lbah = (nbytes >> 8); 2403 qc->tf.lbah = (nbytes >> 8);
2404 2404
2405 if (using_pio || nodata) { 2405 if (nodata)
2406 /* no data, or PIO data xfer */ 2406 qc->tf.protocol = ATAPI_PROT_NODATA;
2407 if (nodata) 2407 else if (using_pio)
2408 qc->tf.protocol = ATAPI_PROT_NODATA; 2408 qc->tf.protocol = ATAPI_PROT_PIO;
2409 else 2409 else {
2410 qc->tf.protocol = ATAPI_PROT_PIO;
2411 } else {
2412 /* DMA data xfer */ 2410 /* DMA data xfer */
2413 qc->tf.protocol = ATAPI_PROT_DMA; 2411 qc->tf.protocol = ATAPI_PROT_DMA;
2414 qc->tf.feature |= ATAPI_PKT_DMA; 2412 qc->tf.feature |= ATAPI_PKT_DMA;