Sebastian Huber sebastian.huber at embedded-brains.de
Fri Mar 22 08:18:04 UTC 2013

On 03/22/2013 12:19 AM, Claus, Ric wrote:
> Thanks, Chris, that was a great help!  It triggered me to try tcpdump.  I see in its output exactly the buffer that my driver is claiming to have sent, along with complaints of 'oui Unknown'.
> It smells like someone is adding sizeof(struct ether_header) to the mbuf payload pointer instead of subtracting it somewhere.
> Surprising, but I guess no one uses DHCP...

This is just a wild guess.  The ARM tool chains for 4.10 and 4.11 differ 
greatly.  The 4.10 version uses an outdated ABI.  In 4.10 the network stack 
does not work without the -mstructure-size-boundary=8 GCC option.

Sebastian Huber, embedded brains GmbH

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