pata_hpt366: no ATAPI DMA

IDE hpt366 driver doesn't allow DMA for ATAPI devices and MWDMA2 on
ATAPI device locks up pata_hpt366.  Follow the suit.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 4824821745a2..e0c4f05d7d57 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -183,7 +183,9 @@ static unsigned long hpt366_filter(struct ata_device *adev, unsigned long mask)
                         mask &= ~(0xF8 << ATA_SHIFT_UDMA);
                 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
                         mask &= ~(0xF0 << ATA_SHIFT_UDMA);
-        }
+        } else if (adev->class == ATA_DEV_ATAPI)
+                mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+
         return ata_bmdma_mode_filter(adev, mask);
 }