uboot-fritz4040: fix crash caused by interaction with gcc 7.1+

David Bauer reported a u-boot crash (data abort) at a odd
place (byteswap) when he ran ping/tftp on his 7530.

|(FRITZ7530) # ping 192.168.1.70
|eth0 PHY0 up Speed :1000 Full duplex
|eth0 PHY1 Down Speed :10 Half duplex
|eth0 PHY2 Down Speed :10 Half duplex
|eth0 PHY3 Down Speed :10 Half duplex
|eth0 PHY4 Down Speed :10 Half duplex
|Using eth0 device
|data abort
|pc : [<84234774>]      lr : [<842351a4>]
|sp : 8412fdb0  ip : 0000009b     fp : 00000000
|r10: 00000000  r9 : 00000001     r8 : 8412ff68
|r7 : 00000000  r6 : 0000002a     r5 : 84244e90  r4 : 8425e28e
|r3 : 84244e90  r2 : 14000045     r1 : 8412fdb0  r0 : 8425e28e
|Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
|Resetting CPU ...
|
|resetting ...

This issue is caused by switch from gcc 5.5 to 7.1+ as explained
in the upstream patch:

|From a768e513b07b5999a8e7d7740ac8d9da04ee7e51 Mon Sep 17 00:00:00 2001
|From: Denis Pynkin <denis.pynkin@collabora.com>
|Date: Fri, 21 Jul 2017 19:28:42 +0300
|Subject: [PATCH] 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 S
|
|Core reason is usage of structures for network headers without packed
|attribute.

This patch just backports the upstream change to the
uboot-fritz4040 package.

Reported-by: David Bauer <mail@david-bauer.net>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

0 files changed, 0 insertions, 0 deletions