1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 3c55a5ff74c7..75e95bdbe02f 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -550,22 +550,22 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .udma_mask = 0x1f,
                 .port_ops = &ali_c2_port_ops
         };
-        /* Revision 0xC3 is UDMA100 */
+        /* Revision 0xC3 is UDMA66 for now */
         static const struct ata_port_info info_c3 = {
                 .sht = &ali_sht,
                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
                 .pio_mask = 0x1f,
                 .mwdma_mask = 0x07,
-                .udma_mask = 0x3f,
+                .udma_mask = 0x1f,
                 .port_ops = &ali_c2_port_ops
         };
-        /* Revision 0xC4 is UDMA133 */
+        /* Revision 0xC4 is UDMA100 */
         static const struct ata_port_info info_c4 = {
                 .sht = &ali_sht,
                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
                 .pio_mask = 0x1f,
                 .mwdma_mask = 0x07,
-                .udma_mask = 0x7f,
+                .udma_mask = 0x3f,
                 .port_ops = &ali_c2_port_ops
         };
         /* Revision 0xC5 is UDMA133 with LBA48 DMA */