This is a regression from the out-of-tree Intel IGB driver happened
between 5.3.5.10 and 5.3.5.18.
The condition here should be actually reveresed, but as we always can
be sure to have a MAX/MIN MTU defined we can just remove it,
essentially going back to the previous code state (which also works
with our current 4.15 kernel).
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
There where just to much issues with the 4.15 in tree drivers for our
users [1]. The updated igb and ixgbe drivers are compatible with
4.15, the e1000e driver needed to be ported to the new internal
kernel timer API, which is pretty straight forward.
[1]: https://forum.proxmox.com/threads/4-15-based-test-kernel-for-pve-5-x-available.42097/page-5
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>