datagrams. Traditionally upper stack fragmented packets without
computing TCP/UDP checksum and these datagrams were passed to
driver. But there are chances that other packets slip into the
interface queue in SMP world. If this happens firmware running on
MIPS 4000 processor in the controller would see mixed packets and
it shall send out corrupted packets.
While I'm here simplify checksum offloading setup.
MFC After: 1 week
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