[yocto] U-Boot networking broken in Rocko

[Martin Townsend]

Hi,

I've discovered that U-Boot in Rocko for several builds that I maintain is
broken when performing various network related operations like tftp, dhcp
and ping. You get a data abort and it resets.  I found that this has
already been fixed in U-Boot with the commit below.  I think it has
something to do with the way GCC 7.1 onwards is now handling memory
alignment.  Anyway the problems have gone away when I apply this patch and
was wondering if it should be included in the U-Boot recipes in Rocko, or
is no-one else seeing this problem?

Many Thanks,
Martin.

commit 704f3acfcf55343043bbed01c5fb0a0094a68e8a
Author: Denis Pynkin <denis.pynkin at collabora.com>
Date:   Fri Jul 21 19:28:42 2017 +0300

    net: Use packed structures for networking

    PXE boot is broken with GCC 7.1 due option '-fstore-merging' enabled
    by default for '-O2':

    BOOTP broadcast 1
    data abort
    pc : [<8ff8bb30>]          lr : [<00004f1f>]
    reloc pc : [<17832b30>]    lr : [<878abf1f>]
    sp : 8f558bc0  ip : 00000000     fp : 8ffef5a4
    r10: 8ffed248  r9 : 8f558ee0     r8 : 8ffef594
    r7 : 0000000e  r6 : 8ffed700     r5 : 00000000  r4 : 8ffed74e
    r3 : 00060101  r2 : 8ffed230     r1 : 8ffed706  r0 : 00000ddd
    Flags: nzcv  IRQs off  FIQs off  Mode SVC_32
    Resetting CPU ...

    Core reason is usage of structures for network headers without packed
    attribute.

    Reviewed-by: Yauheni Kaliuta <yauheni.kaliuta at redhat.com>
    Signed-off-by: Denis Pynkin <denis.pynkin at collabora.com>
    Acked-by: Joe Hershberger <joe.hershberger at ni.com>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20180326/9840e46e/attachment.html>