1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 82af7011f2dd..622350d9b2e3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4024,6 +4024,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 
         /* Weird ATAPI devices */
         { "TORiSAN DVD-ROM DRD-N216", NULL,     ATA_HORKAGE_MAX_SEC_128 },
+        { "QUANTUM DAT    DAT72-000", NULL,     ATA_HORKAGE_ATAPI_MOD16_DMA },
 
         /* Devices we expect to fail diagnostics */
 
@@ -4444,7 +4445,8 @@ int atapi_check_dma(struct ata_queued_cmd *qc)
         /* Don't allow DMA if it isn't multiple of 16 bytes.  Quite a
          * few ATAPI devices choke on such DMA requests.
          */
-        if (unlikely(qc->nbytes & 15))
+        if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
+            unlikely(qc->nbytes & 15))
                 return 1;
 
         if (ap->ops->check_atapi_dma)
@@ -5934,7 +5936,7 @@ static void ata_port_detach(struct ata_port *ap)
          * to us.  Restore SControl and disable all existing devices.
          */
         __ata_port_for_each_link(link, ap) {
-                sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
+                sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
                 ata_link_for_each_dev(dev, link)
                         ata_dev_disable(dev);
         }