From: Tejun Heo <tj@kernel.org>
Date: Tue, 9 Dec 2008 08:14:04 +0000 (+0900)
Subject: pata_hpt366: no ATAPI DMA
X-Git-Tag: v3.12-rc1~16927^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3ee89f177e3cef0b5b024bcb6df683a3fa7d795f;p=kernel%2Fkernel-generic.git

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>
---

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 4824821..e0c4f05 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);
 }