diff options
| author | Jeff Garzik <jgarzik@pobox.com> | 2005-11-05 15:44:48 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-11-05 15:44:48 -0500 |
| commit | 18ce920a6eba05c0d55cdc95fbbadf7e4c4b457b (patch) | |
| tree | c4a4a9a0455c00edf16689cf0252c82c52d518db /drivers/scsi/libata-scsi.c | |
| parent | c4811b151b6584a668de8ae59eb71c4890b9ad94 (diff) | |
| parent | 70d9d825e0a5a78ec1dacaaaf5c72ff5b0206fab (diff) | |
Merge branch 'master'
Diffstat (limited to 'drivers/scsi/libata-scsi.c')
| -rw-r--r-- | drivers/scsi/libata-scsi.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 4f8a013a12f..0dc5503633a 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -355,10 +355,10 @@ struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, qc->scsidone = done; if (cmd->use_sg) { - qc->sg = (struct scatterlist *) cmd->request_buffer; + qc->__sg = (struct scatterlist *) cmd->request_buffer; qc->n_elem = cmd->use_sg; } else { - qc->sg = &qc->sgent; + qc->__sg = &qc->sgent; qc->n_elem = 1; } } else { @@ -702,6 +702,16 @@ int ata_scsi_slave_config(struct scsi_device *sdev) */ blk_queue_max_sectors(sdev->request_queue, 2048); } + + /* + * SATA DMA transfers must be multiples of 4 byte, so + * we need to pad ATAPI transfers using an extra sg. + * Decrement max hw segments accordingly. + */ + if (dev->class == ATA_DEV_ATAPI) { + request_queue_t *q = sdev->request_queue; + blk_queue_max_hw_segments(q, q->max_hw_segments - 1); + } } return 0; /* scsi layer doesn't check return value, sigh */ |