Hi Lothar,
On Tue, Oct 7, 2014 at 10:19 AM, Lothar Waßmann <l...@karo-electronics.de>
wrote:
> commit 1b7bde6d659d ("net: fec: implement rx_copybreak to improve rx
> performance")
> introduced a regression for i.MX28. The swap_buffer() function doing
> the endian conversion of the received data on i.MX28 may access memory
> beyond the actual packet size in the DMA buffer. fec_enet_copybreak()
> does not copy those bytes, so that the last bytes of a packet may be
> filled with invalid data after swapping.
> This will likely lead to checksum errors on received packets.
> E.g. when trying to mount an NFS rootfs:
> UDP: bad checksum. From 192.168.1.225:111 to 192.168.100.73:44662 ulen 36
>
> Do the byte swapping and copying to the new skb in one go if
> necessary.
>
> Signed-off-by: Lothar Waßmann <l...@karo-electronics.de>
Yesterday night I was using linux-next on mx28evk and could not boot from NFS.
I haven't had a chance to debug it, but I am glad you found a fix.
Won't be able to have access to my mx28evk until Thursday to test it though.
Thanks
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