1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/ata/pata_radisys.c b/drivers/ata/pata_radisys.c
index 4401b332eaab..4fd25e737d9a 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -139,9 +139,9 @@ static void radisys_set_dmamode (struct ata_port *ap, struct ata_device *adev)
                 pci_read_config_byte(dev, 0x4A, &udma_mode);
 
                 if (adev->xfer_mode == XFER_UDMA_2)
-                        udma_mode &= ~ (1 << adev->devno);
+                        udma_mode &= ~(2 << (adev->devno * 4));
                 else /* UDMA 4 */
-                        udma_mode |= (1 << adev->devno);
+                        udma_mode |= (2 << (adev->devno * 4));
 
                 pci_write_config_byte(dev, 0x4A, udma_mode);