diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 312f652872b4..ea7d86d2da92 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -7006,6 +7006,64 @@ reset_task_exit:
  * Init service functions
  */
 
+static inline u32 bnx2x_get_pretend_reg(struct bnx2x *bp, int func)
+{
+	switch (func) {
+	case 0: return PXP2_REG_PGL_PRETEND_FUNC_F0;
+	case 1:	return PXP2_REG_PGL_PRETEND_FUNC_F1;
+	case 2:	return PXP2_REG_PGL_PRETEND_FUNC_F2;
+	case 3:	return PXP2_REG_PGL_PRETEND_FUNC_F3;
+	case 4:	return PXP2_REG_PGL_PRETEND_FUNC_F4;
+	case 5:	return PXP2_REG_PGL_PRETEND_FUNC_F5;
+	case 6:	return PXP2_REG_PGL_PRETEND_FUNC_F6;
+	case 7:	return PXP2_REG_PGL_PRETEND_FUNC_F7;
+	default:
+		BNX2X_ERR("Unsupported function index: %d\n", func);
+		return (u32)(-1);
+	}
+}
+
+static void bnx2x_undi_int_disable_e1h(struct bnx2x *bp, int orig_func)
+{
+	u32 reg = bnx2x_get_pretend_reg(bp, orig_func), new_val;
+
+	/* Flush all outstanding writes */
+	mmiowb();
+
+	/* Pretend to be function 0 */
+	REG_WR(bp, reg, 0);
+	/* Flush the GRC transaction (in the chip) */
+	new_val = REG_RD(bp, reg);
+	if (new_val != 0) {
+		BNX2X_ERR("Hmmm... Pretend register wasn't updated: (0,%d)!\n",
+			  new_val);
+		BUG();
+	}
+
+	/* From now we are in the "like-E1" mode */
+	bnx2x_int_disable(bp);
+
+	/* Flush all outstanding writes */
+	mmiowb();
+
+	/* Restore the original funtion settings */
+	REG_WR(bp, reg, orig_func);
+	new_val = REG_RD(bp, reg);
+	if (new_val != orig_func) {
+		BNX2X_ERR("Hmmm... Pretend register wasn't updated: (%d,%d)!\n",
+			  orig_func, new_val);
+		BUG();
+	}
+}
+
+static inline void bnx2x_undi_int_disable(struct bnx2x *bp, int func)
+{
+	if (CHIP_IS_E1H(bp))
+		bnx2x_undi_int_disable_e1h(bp, func);
+	else
+		bnx2x_int_disable(bp);
+}
+
 static void __devinit bnx2x_undi_unload(struct bnx2x *bp)
 {
 	u32 val;
@@ -7056,8 +7114,7 @@ static void __devinit bnx2x_undi_unload(struct bnx2x *bp)
 			/* now it's safe to release the lock */
 			bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_UNDI);
 
-			REG_WR(bp, (BP_PORT(bp) ? HC_REG_CONFIG_1 :
-				    HC_REG_CONFIG_0), 0x1000);
+			bnx2x_undi_int_disable(bp, func);
 
 			/* close input traffic and wait for it */
 			/* Do not rcv packets to BRB */
diff --git a/drivers/net/bnx2x_reg.h b/drivers/net/bnx2x_reg.h
index 0be77c5bcefa..b654d5d2a92b 100644
--- a/drivers/net/bnx2x_reg.h
+++ b/drivers/net/bnx2x_reg.h
@@ -2061,6 +2061,19 @@
 #define PXP2_REG_PGL_INT_XSDM_5 				 0x1204e8
 #define PXP2_REG_PGL_INT_XSDM_6 				 0x1204ec
 #define PXP2_REG_PGL_INT_XSDM_7 				 0x1204f0
+/* [RW 3] this field allows one function to pretend being another function
+   when accessing any BAR mapped resource within the device. the value of
+   the field is the number of the function that will be accessed
+   effectively. after software write to this bit it must read it in order to
+   know that the new value is updated */
+#define PXP2_REG_PGL_PRETEND_FUNC_F0				 0x120674
+#define PXP2_REG_PGL_PRETEND_FUNC_F1				 0x120678
+#define PXP2_REG_PGL_PRETEND_FUNC_F2				 0x12067c
+#define PXP2_REG_PGL_PRETEND_FUNC_F3				 0x120680
+#define PXP2_REG_PGL_PRETEND_FUNC_F4				 0x120684
+#define PXP2_REG_PGL_PRETEND_FUNC_F5				 0x120688
+#define PXP2_REG_PGL_PRETEND_FUNC_F6				 0x12068c
+#define PXP2_REG_PGL_PRETEND_FUNC_F7				 0x120690
 /* [R 1] this bit indicates that a read request was blocked because of
    bus_master_en was deasserted */
 #define PXP2_REG_PGL_READ_BLOCKED				 0x120568