1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index a098ba8eaab6..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);
 }
 
@@ -211,11 +213,15 @@ static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
 
 static int hpt36x_cable_detect(struct ata_port *ap)
 {
-        u8 ata66;
         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u8 ata66;
 
+        /*
+         * Each channel of pata_hpt366 occupies separate PCI function
+         * as the primary channel and bit1 indicates the cable type.
+         */
         pci_read_config_byte(pdev, 0x5A, &ata66);
-        if (ata66 & (1 << ap->port_no))
+        if (ata66 & 2)
                 return ATA_CBL_PATA40;
         return ATA_CBL_PATA80;
 }