[PATCH 4.4 43/69] firewire: net: fix fragmented datagram_size off-by-one

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Stefan Richter commit e9300a4b7bbae83af1f7703938c94cf6dc6d308f upstream. RFC 2734 defines the datagram_size field in fragment encapsulation headers thus:

[PATCH 4.4 43/69] firewire: net: fix fragmented datagram_size off-by-one

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Stefan Richter commit e9300a4b7bbae83af1f7703938c94cf6dc6d308f upstream. RFC 2734 defines the datagram_size field in fragment encapsulation headers thus: datagram_size: The encoded size