1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index c1b667c53f2b..24513e3dcd6b 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -111,7 +111,7 @@ sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
 static void
 sgiioc4_maskproc(ide_drive_t * drive, int mask)
 {
-        writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
+        writeb(ATA_DEVCTL_OBS | (mask ? 2 : 0),
                (void __iomem *)drive->hwif->io_ports.ctl_addr);
 }