diff options
| -rw-r--r-- | drivers/scsi/libata-core.c | 40 |
1 files changed, 11 insertions, 29 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 38fc75d6b39..4e6c2e8ac0f 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -3040,10 +3040,6 @@ static int ata_dma_blacklisted(const struct ata_device *dev) * known limits including host controller limits, device * blacklist, etc... * - * FIXME: The current implementation limits all transfer modes to - * the fastest of the lowested device on the port. This is not - * required on most controllers. - * * LOCKING: * None. */ @@ -3052,8 +3048,8 @@ static void ata_dev_xfermask(struct ata_device *dev) struct ata_port *ap = dev->ap; struct ata_host_set *hs = ap->host_set; unsigned long xfer_mask; - int i; + /* controller modes available */ xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, ap->udma_mask); @@ -3063,34 +3059,20 @@ static void ata_dev_xfermask(struct ata_device *dev) if (ap->cbl == ATA_CBL_PATA40) xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); - /* FIXME: Use port-wide xfermask for now */ - for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *d = &ap->device[i]; - - if (ata_dev_absent(d)) - continue; + xfer_mask &= ata_pack_xfermask(dev->pio_mask, + dev->mwdma_mask, dev->udma_mask); + xfer_mask &= ata_id_xfermask(dev->id); - if (ata_dev_disabled(d)) { - /* to avoid violating device selection timing */ - xfer_mask &= ata_pack_xfermask(d->pio_mask, - UINT_MAX, UINT_MAX); - continue; - } - - xfer_mask &= ata_pack_xfermask(d->pio_mask, - d->mwdma_mask, d->udma_mask); - xfer_mask &= ata_id_xfermask(d->id); - if (ata_dma_blacklisted(d)) - xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); - } - - if (ata_dma_blacklisted(dev)) + if (ata_dma_blacklisted(dev)) { + xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); ata_dev_printk(dev, KERN_WARNING, "device is on DMA blacklist, disabling DMA\n"); + } - if (hs->flags & ATA_HOST_SIMPLEX) { - if (hs->simplex_claimed) - xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); + if ((hs->flags & ATA_HOST_SIMPLEX) && hs->simplex_claimed) { + xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); + ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " + "other device, disabling DMA\n"); } if (ap->ops->mode_filter) |