- All bge(4) supported hardware is known to support RX/TX checksum offloading,

- All bge(4) supported hardware is known to support RX/TX checksum offloading,
  except for BGE_CHIPID_BCM5700_B0, which is buggy.
- All bge(4) supported hardware, has a bug that produces incorrect checksums
  on Ethernet runts. However, in case of a transmitted packet, the latter can
  be padded with zeroes, and the checksum would be correct. (Probably chip
  includes the pad data into checksum). In case of receive, we just don't
  trust checksum data in received runts.

Obtained from:	NetBSD (jonathan) via Mihail Balikov