diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c
index e9c4547723c8..1cb7b44cb660 100644
--- a/drivers/scsi/sata_nv.c
+++ b/drivers/scsi/sata_nv.c
@@ -54,28 +54,21 @@ enum {
 	NV_PORT0_SCR_REG_OFFSET		= 0x00,
 	NV_PORT1_SCR_REG_OFFSET		= 0x40,
 
+	/* INT_STATUS/ENABLE */
 	NV_INT_STATUS			= 0x10,
-	NV_INT_STATUS_CK804		= 0x440,
-	NV_INT_STATUS_PDEV_INT		= 0x01,
-	NV_INT_STATUS_PDEV_PM		= 0x02,
-	NV_INT_STATUS_PDEV_ADDED	= 0x04,
-	NV_INT_STATUS_PDEV_REMOVED	= 0x08,
-	NV_INT_STATUS_SDEV_INT		= 0x10,
-	NV_INT_STATUS_SDEV_PM		= 0x20,
-	NV_INT_STATUS_SDEV_ADDED	= 0x40,
-	NV_INT_STATUS_SDEV_REMOVED	= 0x80,
-
 	NV_INT_ENABLE			= 0x11,
+	NV_INT_STATUS_CK804		= 0x440,
 	NV_INT_ENABLE_CK804		= 0x441,
-	NV_INT_ENABLE_PDEV_MASK		= 0x01,
-	NV_INT_ENABLE_PDEV_PM		= 0x02,
-	NV_INT_ENABLE_PDEV_ADDED	= 0x04,
-	NV_INT_ENABLE_PDEV_REMOVED	= 0x08,
-	NV_INT_ENABLE_SDEV_MASK		= 0x10,
-	NV_INT_ENABLE_SDEV_PM		= 0x20,
-	NV_INT_ENABLE_SDEV_ADDED	= 0x40,
-	NV_INT_ENABLE_SDEV_REMOVED	= 0x80,
 
+	/* INT_STATUS/ENABLE bits */
+	NV_INT_DEV			= 0x01,
+	NV_INT_PM			= 0x02,
+	NV_INT_ADDED			= 0x04,
+	NV_INT_REMOVED			= 0x08,
+
+	NV_INT_PORT_SHIFT		= 4,	/* each port occupies 4 bits */
+
+	/* INT_CONFIG */
 	NV_INT_CONFIG			= 0x12,
 	NV_INT_CONFIG_METHD		= 0x01, // 0 = INT, 1 = SMI
 
@@ -94,7 +87,7 @@ enum nv_host_type
 {
 	GENERIC,
 	NFORCE2,
-	NFORCE3,
+	NFORCE3 = NFORCE2,	/* NF2 == NF3 as far as sata_nv is concerned */
 	CK804
 };