e1000e: flow control thresholds not correct when changing mtu
When changing MTU, save it off prior to resetting otherwise the flow control
thresholds may be miscalculated.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 63458270..fad8f9e 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -4305,8 +4305,10 @@
while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
msleep(1);
- /* e1000e_down has a dependency on max_frame_size */
+ /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
adapter->max_frame_size = max_frame;
+ e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
+ netdev->mtu = new_mtu;
if (netif_running(netdev))
e1000e_down(adapter);
@@ -4336,9 +4338,6 @@
adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
+ ETH_FCS_LEN;
- e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
- netdev->mtu = new_mtu;
-
if (netif_running(netdev))
e1000e_up(adapter);
else