From: Tejun Heo <tj@kernel.org>
Subject: pata_hpt366: no ATAPI DMA
References: bnc#362159

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: Tejun Heo <teheo@suse.de>
---
 drivers/ata/pata_hpt366.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: work/drivers/ata/pata_hpt366.c
===================================================================
--- work.orig/drivers/ata/pata_hpt366.c
+++ work/drivers/ata/pata_hpt366.c
@@ -183,7 +183,9 @@ static unsigned long hpt366_filter(struc
 			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);
 }