1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index 319e164a3d74..6d8619b6f670 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -193,7 +193,7 @@ static __init int winbond_init_one(unsigned long port)
                 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
 
                 ap->ops = &winbond_port_ops;
-                ap->pio_mask = 0x1F;
+                ap->pio_mask = ATA_PIO4;
                 ap->flags |= ATA_FLAG_SLAVE_POSS;
                 ap->ioaddr.cmd_addr = cmd_addr;
                 ap->ioaddr.altstatus_addr = ctl_addr;