diff --git a/[refs] b/[refs]
index edc7eda28657..24daf6eb46b7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3f2010b2ad3d66d5291497c9b274315e7b807ecd
+refs/heads/master: 9c5028e9da1255dd2b99762d8627b88b29f68cce
diff --git a/trunk/drivers/net/ethernet/realtek/r8169.c b/trunk/drivers/net/ethernet/realtek/r8169.c
index 7a0c800b50ad..1adf17757cea 100644
--- a/trunk/drivers/net/ethernet/realtek/r8169.c
+++ b/trunk/drivers/net/ethernet/realtek/r8169.c
@@ -3781,12 +3781,20 @@ static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
 
 static void rtl_hw_jumbo_enable(struct rtl8169_private *tp)
 {
+	void __iomem *ioaddr = tp->mmio_addr;
+
+	RTL_W8(Cfg9346, Cfg9346_Unlock);
 	rtl_generic_op(tp, tp->jumbo_ops.enable);
+	RTL_W8(Cfg9346, Cfg9346_Lock);
 }
 
 static void rtl_hw_jumbo_disable(struct rtl8169_private *tp)
 {
+	void __iomem *ioaddr = tp->mmio_addr;
+
+	RTL_W8(Cfg9346, Cfg9346_Unlock);
 	rtl_generic_op(tp, tp->jumbo_ops.disable);
+	RTL_W8(Cfg9346, Cfg9346_Lock);
 }
 
 static void r8168c_hw_jumbo_enable(struct rtl8169_private *tp)