Subject: Re: eth0: hw csum failure

From: Benjamin Herrenschmidt <[email-masked]>
Date: Sun, 24 Nov 2013 08:17:52 +1100

On Sat, 2013-11-23 at 01:44 +0100, Andreas Schwab wrote:
> I get a lot of "eth0: hw csum failure" with 3.13-rc1 on my G5.

Alex Graf already reported that, we're looking into it.

Cheers,
Ben.

> eth0: hw csum failure
> CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.13.0-rc1 #1
> Call Trace:
> [c00000000ffef1d0] [c00000000000f97c] .show_stack+0x60/0x14c (unreliable)
> [c00000000ffef2a0] [c00000000069fad8] .dump_stack+0x80/0xa0
> [c00000000ffef320] [c000000000552bc0] .netdev_rx_csum_fault+0x4c/0x58
> [c00000000ffef3a0] [c000000000546f88] .__skb_checksum_complete_head+0x54/0x78
> [c00000000ffef420] [c0000000005f1118] .nf_ip_checksum+0xf4/0x100
> [c00000000ffef4b0] [c00000000058e520] .udp_error+0x198/0x210
> [c00000000ffef560] [c000000000587694] .nf_conntrack_in+0x14c/0xa20
> [c00000000ffef690] [c0000000005f195c] .ipv4_conntrack_in+0x24/0x38
> [c00000000ffef700] [c00000000058343c] .nf_iterate+0x64/0xb4
> [c00000000ffef7c0] [c00000000058353c] .nf_hook_slow+0xb0/0x188
> [c00000000ffef890] [c00000000059ea9c] .ip_rcv+0x390/0x3f0
> [c00000000ffef930] [c000000000551578] .__netif_receive_skb_core+0x8c4/0x964
> [c00000000ffefa30] [c000000000551c38] .netif_receive_skb+0xb0/0x130
> [c00000000ffefae0] [c000000000552740] .napi_gro_receive+0x50/0xc0
> [c00000000ffefb60] [c000000000447754] .gem_poll+0x10f0/0x1328
> [c00000000ffefcc0] [c000000000552418] .net_rx_action+0xd8/0x240
> [c00000000ffefd90] [c00000000004dfc4] .__do_softirq+0x158/0x2c0
> [c00000000ffefea0] [c00000000004e448] .irq_exit+0x6c/0xc4
> [c00000000ffeff10] [c00000000000ce14] .__do_irq+0xec/0xf8
> [c00000000ffeff90] [c000000000019474] .call_do_irq+0x14/0x24
> [c0000001f615ba30] [c00000000000cea0] .do_IRQ+0x80/0xc0
> [c0000001f615bac0] [c0000000000024b8] hardware_interrupt_common+0x138/0x180
> --- Exception: 501 at .arch_cpu_idle+0x78/0x124
>     LR = .arch_cpu_idle+0x78/0x124
> [c0000001f615bdb0] [c0000000000a3af4] .rcu_idle_enter+0x98/0xb8 (unreliable)
> [c0000001f615be30] [c00000000009a978] .cpu_startup_entry+0x110/0x1a0
> [c0000001f615bee0] [c00000000001f14c] .start_secondary+0x288/0x290
> [c0000001f615bf90] [c0000000000087fc] .start_secondary_prolog+0x10/0x14
> 
> Andreas.
>