1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index edb37f3d558d..236d8fd4e72b 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -539,13 +539,19 @@ static ide_pci_device_t piix_pci_info[] __devinitdata = {
         /*  0 */ DECLARE_PIIX_DEV("PIIXa"),
         /*  1 */ DECLARE_PIIX_DEV("PIIXb"),
 
-        {       /* 2 */
+        /*  2 */
+        {       /*
+                 * MPIIX actually has only a single IDE channel mapped to
+                 * the primary or secondary ports depending on the value
+                 * of the bit 14 of the IDETIM register at offset 0x6c
+                 */
                 .name           = "MPIIX",
                 .init_hwif      = init_hwif_piix,
                 .channels       = 2,
                 .autodma        = NODMA,
-                .enablebits     = {{0x6D,0x80,0x80}, {0x6F,0x80,0x80}},
+                .enablebits     = {{0x6d,0xc0,0x80}, {0x6d,0xc0,0xc0}},
                 .bootable       = ON_BOARD,
+                .flags          = IDEPCI_FLAG_ISA_PORTS
         },
 
         /*  3 */ DECLARE_PIIX_DEV("PIIX3"),