ixgb: leave room for extra hardware memory usage
ixgb hardware (not ixgbe) has a problem where it might dma past the
end of a buffer in certain cases. leave 8 bytes extra room.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index ecd5252..ec8bce1 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -560,7 +560,7 @@
hw->subsystem_id = pdev->subsystem_device;
hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
- adapter->rx_buffer_len = hw->max_frame_size;
+ adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
if((hw->device_id == IXGB_DEVICE_ID_82597EX)
|| (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
@@ -1573,7 +1573,7 @@
return -EINVAL;
}
- adapter->rx_buffer_len = max_frame;
+ adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
netdev->mtu = new_mtu;