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Date: Thu, 23 Jul 2015 05:07:06 -0400
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Subject: 4.2-rc3: APM xgene2: ethernet doesn't work
From: Ming Lei <ming.lei@canonical.com>
To: Suman Tripathi <stripathi@apm.com>,
        "David S. Miller" <davem@davemloft.net>,
        Network Development <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Andrew Cloke <andrew.cloke@canonical.com>
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Hi Guys,

When booting from UEFI/ACPI, sometimes there is a crash[1]
from rx path, sometimes there isn't any rx packets comming.

Firmware version: 2.02.10

Thanks,

[1], crash log
Call trace:
skbuff: skb_over_panic: text:ffffffc00048094c len:85 put:60
head:ffffffffffffffff data:          (null) tail:0x3c end:0x0
dev:<NULL>
Kernel panic - not syncing: BUG!
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.2.0-rc3+ #76
Hardware name: AppliedMicro Mustang/Mustang, BIOS 2.0.0 Jun  9 2015
Call trace:
[<ffffffc000089b94>] dump_backtrace+0x0/0x12c
[<ffffffc000089cd0>] show_stack+0x10/0x1c
[<ffffffc0005fbe48>] dump_stack+0x8c/0xdc
[<ffffffc0005f8448>] panic+0xe4/0x220
[<ffffffc0005fcfa4>] skb_panic+0x74/0x78
[<ffffffc000526e88>] skb_put+0x88/0x8c
[<ffffffc000480948>] xgene_enet_process_ring+0xcc/0x394
[<ffffffc000480edc>] xgene_enet_napi+0x1c/0x54
[<ffffffc000537fbc>] net_rx_action+0x124/0x2c0
[<ffffffc0000b0070>] __do_softirq+0x110/0x238
[<ffffffc0000b0400>] irq_exit+0x88/0xf0
[<ffffffc0000e98b8>] __handle_domain_irq+0x68/0xb4
[<ffffffc0000824a0>] gic_handle_irq+0x30/0x7c
Exception stack(0xffffffc000877dc0 to 0xffffffc000877ee0)
7dc0: 00874000 ffffffc0 0087a648 ffffffc0 00877f00 ffffffc0 000869e0 ffffffc0
7de0: 00000000 00000000 00877f10 ffffffc0 fffbcb38 ffffffc7 fffbcb44 ffffffc7
7e00: 00000000 01000000 da24b9c8 ffffffc7 fffbe0d9 ffffffc7 fffbe0d8 ffffffc7
7e20: 008813a0 ffffffc0 ffff9429 00000000 00000750 00000000 008c93a9 ffffffc0
7e40: 007a1b38 ffffffc0 007a1b20 ffffffc0 df5d7500 ffffffbe 00000000 00000000
7e60: 98ab6000 0000007f 98a9d440 0000007f 00000000 00000000 00874000 ffffffc0
7e80: 0087a648 ffffffc0 00867b00 ffffffc0 00000001 00000000 00877f20 ffffffc0
7ea0: 00614500 ffffffc0 00785000 ffffffc0 008c9000 ffffffc0 0087a6cc ffffffc0
7ec0: ffa01348 00000047 00877f00 ffffffc0 000869dc ffffffc0 00877f00 ffffffc0
[<ffffffc0000855a4>] el1_irq+0x64/0xd8
[<ffffffc0000e03fc>] default_idle_call+0x18/0x2c
[<ffffffc0000e050c>] cpu_startup_entry+0xfc/0x180
[<ffffffc0005f5f64>] rest_init+0x80/0x8c
[<ffffffc0008269b8>] start_kernel+0x3c0/0x3d8
Rebooting in 1 seconds..[DRAM: PHY calibrating ...ignored]
 ECC init *********ignored]
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