diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b865c5d448378d1fa2aa0ecd9c540092c2507a98..ef849b1eb1103a0c5cba6ef356bda47207f5eae1 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8701,7 +8701,9 @@ static void tg3_get_ethtool_stats (struct net_device *dev,
 }
 
 #define NVRAM_TEST_SIZE 0x100
-#define NVRAM_SELFBOOT_FORMAT1_SIZE 0x14
+#define NVRAM_SELFBOOT_FORMAT1_0_SIZE	0x14
+#define NVRAM_SELFBOOT_FORMAT1_2_SIZE	0x18
+#define NVRAM_SELFBOOT_FORMAT1_3_SIZE	0x1c
 #define NVRAM_SELFBOOT_HW_SIZE 0x20
 #define NVRAM_SELFBOOT_DATA_SIZE 0x1c
 
@@ -8716,9 +8718,22 @@ static int tg3_test_nvram(struct tg3 *tp)
 	if (magic == TG3_EEPROM_MAGIC)
 		size = NVRAM_TEST_SIZE;
 	else if ((magic & TG3_EEPROM_MAGIC_FW_MSK) == TG3_EEPROM_MAGIC_FW) {
-		if ((magic & 0xe00000) == 0x200000)
-			size = NVRAM_SELFBOOT_FORMAT1_SIZE;
-		else
+		if ((magic & TG3_EEPROM_SB_FORMAT_MASK) ==
+		    TG3_EEPROM_SB_FORMAT_1) {
+			switch (magic & TG3_EEPROM_SB_REVISION_MASK) {
+			case TG3_EEPROM_SB_REVISION_0:
+				size = NVRAM_SELFBOOT_FORMAT1_0_SIZE;
+				break;
+			case TG3_EEPROM_SB_REVISION_2:
+				size = NVRAM_SELFBOOT_FORMAT1_2_SIZE;
+				break;
+			case TG3_EEPROM_SB_REVISION_3:
+				size = NVRAM_SELFBOOT_FORMAT1_3_SIZE;
+				break;
+			default:
+				return 0;
+			}
+		} else
 			return 0;
 	} else if ((magic & TG3_EEPROM_MAGIC_HW_MSK) == TG3_EEPROM_MAGIC_HW)
 		size = NVRAM_SELFBOOT_HW_SIZE;
@@ -8745,8 +8760,17 @@ static int tg3_test_nvram(struct tg3 *tp)
 	    TG3_EEPROM_MAGIC_FW) {
 		u8 *buf8 = (u8 *) buf, csum8 = 0;
 
-		for (i = 0; i < size; i++)
-			csum8 += buf8[i];
+		if ((cpu_to_be32(buf[0]) & TG3_EEPROM_SB_REVISION_MASK) ==
+		    TG3_EEPROM_SB_REVISION_2) {
+			/* For rev 2, the csum doesn't include the MBA. */
+			for (i = 0; i < TG3_EEPROM_SB_F1R2_MBA_OFF; i++)
+				csum8 += buf8[i];
+			for (i = TG3_EEPROM_SB_F1R2_MBA_OFF + 4; i < size; i++)
+				csum8 += buf8[i];
+		} else {
+			for (i = 0; i < size; i++)
+				csum8 += buf8[i];
+		}
 
 		if (csum8 == 0) {
 			err = 0;
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index c6aad49a375d25ed77f2a5d8dbb4ae09b478821a..f715b35dfd5457811811bccadd634ce544c441bd 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1555,6 +1555,12 @@
 #define TG3_EEPROM_MAGIC		0x669955aa
 #define TG3_EEPROM_MAGIC_FW		0xa5000000
 #define TG3_EEPROM_MAGIC_FW_MSK		0xff000000
+#define TG3_EEPROM_SB_FORMAT_MASK	0x00e00000
+#define TG3_EEPROM_SB_FORMAT_1		0x00200000
+#define TG3_EEPROM_SB_REVISION_MASK	0x001f0000
+#define TG3_EEPROM_SB_REVISION_0	0x00000000
+#define TG3_EEPROM_SB_REVISION_2	0x00020000
+#define TG3_EEPROM_SB_REVISION_3	0x00030000
 #define TG3_EEPROM_MAGIC_HW		0xabcd
 #define TG3_EEPROM_MAGIC_HW_MSK		0xffff
 
@@ -1765,6 +1771,8 @@
 /* APE convenience enumerations. */
 #define TG3_APE_LOCK_MEM                4
 
+#define TG3_EEPROM_SB_F1R2_MBA_OFF	0x10
+
 
 /* There are two ways to manage the TX descriptors on the tigon3.
  * Either the descriptors are in host DMA'able memory, or they