e1000: fix panic on large frame receive when mtu=default

A panic was reported when receiving 1522 size packets if using
the default MTU. we should set the initial rx buffer length to the
value that e1000changemtu sets so that we can receive any packet
that would not be dropped by LPE=0.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke.jan.h.kok@intel.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 0074a3a506a5..154acb2cde91 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1068,7 +1068,7 @@ e1000_sw_init(struct e1000_adapter *adapter)
 
         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 
-        adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
+        adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
         hw->max_frame_size = netdev->mtu +
                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
@@ -3148,7 +3148,6 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
 
         /* adjust allocation if LPE protects us, and we aren't using SBP */
-#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
         if (!adapter->hw.tbi_compatibility_on &&
             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))