[FS#873] problems of mt7628 wifi driver on miwifi nano

[LEDE Bugs]

The following task has a new comment added:

FS#873 - problems of mt7628 wifi driver on miwifi nano
User who did this - dibg (dibg)

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I love the freedom i have by using Lede. I bought the lovely xiaomi nano couple of years ago and even i had problem with openwrt i refused to give up on them. I had some older openwrt snapshot from 2016, i tried the stable 17.01.4 and then the last snapshot from couple days (OpenWrt SNAPSHOT r6074-267873a / LuCI Master (git-18.039.58622-76f9f5e) and the problem persists. The wifi hangs after some gigabytes of transfer. It seems this mt7603_mac.c is always responsible for everything. Global warming, traffic, crashing my router. I not have the super power to decipher and act upon this information but you may posses this gift.

here is the confusing message:  

Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.762771] ------------[ cut here ]------------
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.767513] WARNING: CPU: 0 PID: 38 at /build/lede-17.01/slaves/phase1/ramips_mt7628/build/build_dir/target-mipsel_24kc_musl-1.1.16/linux-ramips_mt7628/mt76-2017-10-12-1be430fc/mt7603_mac.c:1279 0x830cd510 [mt7603e at 830c8000+0x6c60]()
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.788500] Modules linked in: pppoe ppp_async iptable_nat pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 ipt_REJECT ipt_MASQUERADE 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 xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crTue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.854825] CPU: 0 PID: 38 Comm: kworker/u2:2 Tainted: G        W       4.4.92 #0
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.862427] Workqueue: phy0 0x830cd420 [mt7603e at 830c8000+0x6c60]
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] Stack : 83803410 83907898 00000088 8004aba4 00000000 00000000 00000000 00000000
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] 	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] 	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] 	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] 	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.868529] 	  ...
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.904670] Call Trace:[] 0x8004aba4
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.909204] [] 0x800144e0
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.912741] [] 0x800144e0
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.916288] [] 0x80025054
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.919839] [] 0x830cd510 [mt7603e at 830c8000+0x6c60]
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.925696] [] 0x8002510c
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.929232] [] 0x80042e6c
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.932777] [] 0x80043338
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.936328] [] 0x830cd510 [mt7603e at 830c8000+0x6c60]
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.942169] [] 0x80036a28
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.945754] [] 0x80037850
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.949297] [] 0x800375a0
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.952856] [] 0x800375a0
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.956398] [] 0x8003bc30
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.959967] [] 0x8003bb58
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.963523] [] 0x80004478
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.967063] 
Tue Feb 13 06:32:39 2018 kern.warn kernel: [ 4370.968574] ---[ end trace fa7bf67cdbe8584c ]--- 


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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=873#comment4319