diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index b14e7ef..f66e2a5 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -330,14 +330,14 @@
 	{
 		.flags		= AHCI_FLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
 	/* board_ahci_pi */
 	{
 		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
 		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
 	/* board_ahci_vt8251 */
@@ -345,14 +345,14 @@
 		.flags		= AHCI_FLAG_COMMON | ATA_FLAG_HRST_TO_RESUME |
 				  AHCI_FLAG_NO_NCQ,
 		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_vt8251_ops,
 	},
 	/* board_ahci_ign_iferr */
 	{
 		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
 		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
 	/* board_ahci_sb600 */
@@ -361,7 +361,7 @@
 				  AHCI_FLAG_IGN_SERR_INTERNAL |
 				  AHCI_FLAG_32BIT_ONLY,
 		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
 };
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 78bdfd0..2ad5872 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -250,7 +250,7 @@
 				  PDC_FLAG_SATA_PATA,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_old_sata_ops,
 	},
 
@@ -259,7 +259,7 @@
 		.flags		= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_pata_ops,
 	},
 
@@ -269,7 +269,7 @@
 				  PDC_FLAG_4_PORTS,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_old_sata_ops,
 	},
 
@@ -279,7 +279,7 @@
 				  PDC_FLAG_4_PORTS,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_pata_ops,
 	},
 
@@ -289,7 +289,7 @@
 				  PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_sata_ops,
 	},
 
@@ -299,7 +299,7 @@
 				  PDC_FLAG_GEN_II,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_pata_ops,
 	},
 
@@ -309,7 +309,7 @@
 				  PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_sata_ops,
 	},
 };
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 3d83ee2..5193bd8 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -279,7 +279,7 @@
 				  ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
-		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &pdc_20621_ops,
 	},