[FS#1333] MTK Ethernet Issues After NAPI polling Changes

Mon Feb 12 15:08:20 PST 2018

The following task has a new comment added:

FS#1333 - MTK Ethernet Issues After NAPI polling Changes
User who did this - Andrei Măceș (airend)

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[  708.250919] ------------[ cut here ]------------
[  708.255679] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x174/0x260
[  708.264134] NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
[  708.271243] Modules linked in: rt2800usb rt2800soc rt2800pci rt2800mmio rt2800lib pppoe ppp_async rt2x00usb rt2x00soc rt2x00pci rt2x00mmio rt2x00lib rndis_host pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 cdc_ether xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG usbnet slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_itu_t crc_ccitt compat ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables eeprom_93cx6 leds_gpio dwc2 ohci_platform ohci_hcd
[  708.343550]  ehci_platform ehci_hcd gpio_button_hotplug usbcore nls_base usb_common mii
[  708.350423] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.77 #0
[  708.356296] Stack : 803f751a 00000031 00000000 00000001 803a358c 803a3207 8036d760 00000000
[  708.364858]         803f3660 0000013c ffffffff 00000200 00200000 8004c174 803b4e3c 803b4e40
[  708.373422]         80372f0c 00000003 803710d4 87c0de2c ffffffff 80079860 00200000 8004c174
[  708.381986]         00000006 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  708.390529]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  708.399096]         ...
[  708.401608] Call Trace:
[  708.404128] [] show_stack+0x70/0x8c
[  708.408594] [] __warn+0x110/0x118
[  708.412883] [] warn_slowpath_fmt+0x30/0x3c
[  708.417959] [] dev_watchdog+0x174/0x260
[  708.422789] [] call_timer_fn.isra.5+0x24/0x84
[  708.428124] [] run_timer_softirq+0x1e8/0x1f4
[  708.433392] [] __do_softirq+0x164/0x294
[  708.438196] [] handle_int+0x138/0x144
[  708.442831] [] r4k_wait_irqoff+0x18/0x24
[  708.447723] [] cpu_startup_entry+0xa8/0xd4
[  708.452823] [] start_kernel+0x40c/0x42c
[  708.457631] ---[ end trace e28f1de44393a550 ]---
[  708.462364] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[  708.468685] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[  708.474840] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=2, dtx=2, fdx=81, next=2
[  708.485155] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=115, drx=117
[  712.000015] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[  712.006346] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[  712.012510] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=97, dtx=97, fdx=32, next=97
[  712.023094] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=15, drx=16
[  717.063229] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[  717.069560] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[  717.075721] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=32, dtx=32, fdx=16, next=32
[  717.086305] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=80, drx=81
[  717.585119] pppoe-wan: renamed from ppp0
[13757.596585] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[13757.602926] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[13757.609127] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=104, dtx=104, fdx=99, next=104
[13757.619976] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=96, drx=97
[13759.271909] pppoe-wan: renamed from ppp0
[26674.283342] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[26674.289679] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[26674.295844] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=69, dtx=69, fdx=9, next=69
[26674.306345] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=59, drx=60
[26679.228597] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[26679.234931] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[26679.241092] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=97, dtx=97, fdx=48, next=97
[26679.251674] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=108, drx=109
[26684.283919] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[26684.290251] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[26684.296413] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=47, dtx=47, fdx=16, next=47
[26684.306997] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=32, drx=33
[26685.279776] pppoe-wan: renamed from ppp0
[28994.689482] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[28994.695811] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[28994.701972] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=20, dtx=20, fdx=110, next=20
[28994.712651] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=60, drx=61
[29000.685179] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29000.691512] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29000.697678] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=97, dtx=97, fdx=32, next=97
[29000.708263] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=25, drx=26
[29005.247494] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29005.253826] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29005.260034] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=30, dtx=30, fdx=16, next=30
[29005.270616] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=6, drx=7
[29009.181056] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29009.187388] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29009.193549] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=18, dtx=18, fdx=16, next=18
[29009.204132] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=25, drx=26
[29010.237026] pppoe-wan: renamed from ppp0
[29246.440489] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29246.446841] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29246.453014] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=48, dtx=48, fdx=7, next=48
[29246.463509] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=119, drx=120
[29251.709731] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29251.716065] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29251.722226] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=97, dtx=97, fdx=23, next=97
[29251.732811] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=20, drx=21
[29256.717135] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29256.723468] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29256.729629] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=26, dtx=26, fdx=16, next=26
[29256.740214] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=11, drx=12
[29257.522807] pppoe-wan: renamed from ppp0
[29499.400513] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29499.406845] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29499.413014] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=14, dtx=14, fdx=93, next=14
[29499.423604] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=39, drx=40
[29504.883386] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[29504.889722] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[29504.895883] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=96, dtx=96, fdx=48, next=96
[29504.906466] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=24, drx=25
[29505.341774] pppoe-wan: renamed from ppp0
[31797.638104] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31797.644446] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31797.650610] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=103, dtx=103, fdx=62, next=103
[31797.661460] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=48, drx=50
[31803.250355] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31803.256691] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31803.262854] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=97, dtx=97, fdx=32, next=97
[31803.273437] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=18, drx=19
[31808.211583] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31808.217915] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31808.224075] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=32, dtx=32, fdx=16, next=32
[31808.234663] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=9, drx=10
[31811.650913] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31811.657248] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31811.663408] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31811.673989] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=9, drx=10
[31816.582155] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31816.588492] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31816.594654] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31816.605236] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31820.865604] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31820.871935] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31820.878101] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31820.888686] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=8, drx=9
[31824.955800] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31824.962131] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31824.968294] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31824.978876] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=9, drx=10
[31829.883918] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31829.890253] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31829.896417] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31829.906999] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=9, drx=10
[31833.874673] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31833.881002] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31833.887169] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31833.897753] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31838.273078] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31838.279411] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31838.285575] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31838.296158] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=8, drx=9
[31843.210132] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31843.216469] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31843.222635] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31843.233226] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=9, drx=10
[31846.851006] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31846.857337] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31846.863501] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31846.874084] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=8, drx=9
[31851.590122] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31851.596456] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31851.602617] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31851.613197] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=9, drx=10
[31856.527978] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31856.534315] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31856.540481] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31856.551067] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=11, drx=12
[31859.974867] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31859.981200] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31859.987361] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31859.997942] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31864.920535] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31864.926870] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31864.933031] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31864.943614] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=11, drx=12
[31869.877225] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31869.883562] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31869.889729] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31869.900314] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=11, drx=12
[31873.330524] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31873.336856] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31873.343017] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31873.353599] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=8, drx=9
[31878.266544] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31878.272877] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31878.279038] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31878.289622] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31882.578162] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31882.584492] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31882.590683] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31882.601278] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=10, drx=11
[31886.669329] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31886.675661] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31886.681823] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31886.692405] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=11, drx=12
[31891.612618] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31891.618952] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31891.625114] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31891.635694] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=9, drx=10
[31895.616150] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31895.622482] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31895.628655] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31895.639245] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31899.985771] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31899.992101] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31899.998262] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31900.008846] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=10, drx=11
[31904.932315] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31904.938648] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31904.944809] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31904.955393] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=8, drx=9
[31908.581092] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31908.587423] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31908.593586] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31908.604176] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=14, drx=15
[31913.307931] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31913.314266] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31913.320425] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=0713f000, max=128, ctx=17, dtx=17, fdx=16, next=17
[31913.331008] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=07142000, max=128, calc=12, drx=13
[31916.750403] mtk_soc_eth 10100000.ethernet eth0: transmit timed out
[31916.756736] mtk_soc_eth 10100000.ethernet eth0: dma_cfg:80000065
[31916.762895] mtk_soc_eth 10100000.ethernet eth0: tx_ring=0, base=07142000, max=128, ctx=56, dtx=56, fdx=32, next=56
[31916.773478] mtk_soc_eth 10100000.ethernet eth0: rx_ring=0, base=0713f000, max=128, calc=35, drx=36
[31916.933199] pppoe-wan: renamed from ppp0

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1333#comment4316