------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:328 dev_watchdog+0x1ac/0x320
NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
Modules linked in: nf_nat_pptp nf_conntrack_pptp nf_nat_proto_gre nf_conntrack_proto_gre fast_classifier mt7615e mt76 mac80211 compat [last unloaded: nf_conntrack_proto_gre]
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.170 #184
Stack : 00000000 87e7cf40 ffffffff 8007e0a4 80490000 8048ac0c 80610000 805ace24
        80586c9c 87c0bdcc 87c34cdc 805ee787 805809e4 00000001 87c0bd70 805f4018
        00000000 00000000 80650000 00000000 81147bb8 00000114 00000007 00000000
        00000000 80660000 80660000 70617773 00000000 80610000 00000000 802fdae0
        805a50bc 00000148 00000001 87e7cf40 00000018 8022f688 00000004 80650004
        ...
Call Trace:
[<800153a0>] show_stack+0x58/0x100
[<804376b4>] dump_stack+0xa4/0xe0
[<80034f90>] __warn+0xe4/0x144
[<80034bcc>] warn_slowpath_fmt+0x30/0x3c
[<802fdae0>] dev_watchdog+0x1ac/0x320
[<80094cbc>] call_timer_fn.isra.28+0x24/0x84
[<80095020>] run_timer_softirq+0x1c0/0x24c
[<80454414>] __do_softirq+0x12c/0x2ec
[<80039700>] irq_exit+0xa8/0xc4
[<801eae74>] plat_irq_dispatch+0xf0/0x13c
[<800105a8>] except_vec_vi_end+0xb8/0xc4
[<80011f28>] r4k_wait_irqoff+0x1c/0x24
---[ end trace 618b4e1e1832c2df ]---
mtk_soc_eth 1e100000.ethernet eth0: transmit timed out
mtk_soc_eth 1e100000.ethernet eth0: dma_cfg:80000065
mtk_soc_eth 1e100000.ethernet eth0: tx_ring=0, base=06570000, max=0, ctx=3463, dtx=3463, fdx=3462, next=3463
mtk_soc_eth 1e100000.ethernet eth0: rx_ring=0, base=05d10000, max=0, calc=3145, drx=3152
mtk_soc_eth 1e100000.ethernet: 0x100 = 0x6060000c, 0x10c = 0x80818
mtk_soc_eth 1e100000.ethernet: PPE started