--- 1432dc9d0ab819d899ac3a506606a6778b146f30
+++ 9434114b2ca8cb6f42e40d4ed2091360cd2add9e
@@ -453,7 +453,9 @@ static void ali_init_chipset(struct pci_
 			/* Clear CD-ROM DMA write bit */
 			tmp &= 0x7F;
 		/* Cable and UDMA */
-		pci_write_config_byte(pdev, 0x4B, tmp | 0x09);
+		if (pdev->revision >= 0xc2)
+			tmp |= 0x01;
+		pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
 		/*
 		 * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
 		 * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control