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-rw-r--r--drivers/ata/pata_ali.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 1432dc9d0ab..9434114b2ca 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -453,7 +453,9 @@ static void ali_init_chipset(struct pci_dev *pdev)
/* 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