On Fri, 21 Apr 2017 14:39:00 +0200
Rafa Corvillo <rafael.corvi...@aoifes.com> wrote:
> We are working in an ARMv7 embedded system running kernel 4.9 (LEDE build).
> It is an imx6 board with 2 ethernet interfaces. One of them is connected to
> a Marvell switch.
>
> The schema of the system is the following:
>
> +-------------------+ eth0
> | +--+
> | | |
> | Embedded system +--+
> | |
> | ARMv7 |
> | | Marvell 88E8057(sky2) +-------------+
> | +--+ +--+ +--+ eth1
> | | +---------------------+ | | +------+
> | +--+ CPU port +--+ mv88e6176 +--+
> +------+--+---------+ | |
> emulated| | | |
> GPIO +--+ +--+ +--+ eth2
> MDIO +-----------------------------------+ | | +------+
> MDIO +--+ +--+
> +-------------+
>
> There is a bridge (br-lan) which includes eth0/eth1/eth2
>
> If I connect the eth1/eth2, the link is up and I can do ping through it.
> But, once
> I start sending a heavy traffic load the link fails and the kernel sends the
> following messages:
>
> [ 48.557140] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.564964] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.572110] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.579263] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.586417] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.593573] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 48.600718] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 54.877567] net_ratelimit: 6 callbacks suppressed
> [ 54.882293] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
> [ 61.413552] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
> length 1518
The status error bits are in sky2.h
0x5f20010 is
05f2 frame length => 1522
0010 Too long err
That means the packet was longer than the configured MTU.
You are probably getting packets with VLAN tag but have not configured
a VLAN.
