[U-Boot] [PATCH 17/28] net: Refactor to separate the UDP handler from the ARP handler

[Mike Frysinger]

On Thursday 19 January 2012 19:53:20 Joe Hershberger wrote:
> Only call the handlers if one was registered... don't require
>    protocols to register a handler (eliminating dummies)
> NetConsole now uses the ARP handler when waiting on arp (instead of
>    needing a #define hack in arp.c)
> Clear handlers at the end of net loop

what if the SetHandler funcs took care of setting to a dummy func when it was 
given NULL ?  then calling code need not worry about creating their own 
dummies, and you don't have to add NULL pointer checking.
-mike
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