Merge tag 'v4.0.8' into xlnx_4.0.8-rt6

[zynq/linux.git] / drivers / net / ethernet / intel / e1000 / e1000_main.c

diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 7f997d36948f3e59621b3698b1a43b36166ecf93..a71c446631d19cbfc761eeec37b331ea37ee04ef 100644 (file)
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -144,6 +144,11 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
                                     struct e1000_rx_ring *rx_ring,
                                     int *work_done, int work_to_do);
+static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter,
+                                        struct e1000_rx_ring *rx_ring,
+                                        int cleaned_count)
+{
+}
 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
                                   struct e1000_rx_ring *rx_ring,
                                   int cleaned_count);
@@ -3552,8 +3557,11 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
                msleep(1);
        /* e1000_down has a dependency on max_frame_size */
        hw->max_frame_size = max_frame;
-       if (netif_running(netdev))
+       if (netif_running(netdev)) {
+               /* prevent buffers from being reallocated */
+               adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
                e1000_down(adapter);
+       }
 
        /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
         * means we reserve 2 more, this pushes us to allocate from the next