r8169: NULL pointer dereference on r8169 load

mmio_addr in r8169 needs to be initialized before use

Maybe that all tp-> initialization should be moved before rtl_init_mac_address call,
but this is enough to get rid of crash in rtl_rar_set due to mmio_addr being uninitialized.
Signed-off-by: NPetr Vandrovec <petr@vandrovec.name>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/r8169.c

@@ -2154,6 +2154,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	spin_lock_init(&tp->lock);
 
+	tp->mmio_addr = ioaddr;
+
 	rtl_init_mac_address(tp, ioaddr);
 
 	/* Get MAC address */
@@ -2186,7 +2188,6 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif
 
 	tp->intr_mask = 0xffff;
-	tp->mmio_addr = ioaddr;
 	tp->align = cfg->align;
 	tp->hw_start = cfg->hw_start;
 	tp->intr_event = cfg->intr_event;