[FS#896] mt7620 - dropping frames (WiFi)

[LEDE Bugs]

The following task has a new comment added:

FS#896 - mt7620 - dropping frames (WiFi)
User who did this - psyborg55 (psyborg55)

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interface freeze in AP+STA mode. try scanning for APs did not work, logs revealed:

Sat Oct  7 21:33:17 2017 kern.warn kernel: [  564.296131] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:18 2017 kern.warn kernel: [  564.504294] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:18 2017 kern.warn kernel: [  564.512990] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:19 2017 kern.warn kernel: [  564.761902] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:20 2017 kern.warn kernel: [  564.971253] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:20 2017 kern.warn kernel: [  564.979359] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:20 2017 kern.warn kernel: [  565.009553] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:21 2017 kern.warn kernel: [  565.258527] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:21 2017 kern.warn kernel: [  565.466837] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:21 2017 kern.warn kernel: [  565.497405] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:22 2017 kern.warn kernel: [  565.747321] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:23 2017 kern.warn kernel: [  565.956239] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:23 2017 kern.warn kernel: [  565.986827] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:24 2017 kern.warn kernel: [  566.235633] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:25 2017 kern.warn kernel: [  566.443898] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:25 2017 kern.warn kernel: [  566.474659] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:26 2017 kern.warn kernel: [  566.724444] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:27 2017 kern.warn kernel: [  566.932710] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:27 2017 kern.warn kernel: [  566.963749] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:28 2017 kern.warn kernel: [  567.212917] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:28 2017 kern.warn kernel: [  567.421523] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:29 2017 kern.warn kernel: [  567.452104] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:29 2017 kern.warn kernel: [  567.700880] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:30 2017 kern.warn kernel: [  567.909396] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:30 2017 kern.warn kernel: [  567.940270] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:31 2017 kern.warn kernel: [  568.188520] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:32 2017 kern.warn kernel: [  568.398126] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:32 2017 kern.warn kernel: [  568.428698] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:33 2017 kern.warn kernel: [  569.107345] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:34 2017 kern.warn kernel: [  569.669877] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:34 2017 kern.warn kernel: [  569.700900] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:35 2017 kern.warn kernel: [  569.949391] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:36 2017 kern.warn kernel: [  570.158053] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
Sat Oct  7 21:33:36 2017 kern.warn kernel: [  570.189239] ieee80211 phy1: rt2800_config_txpower_rt6352: Warning - ignoring EEPROM HT40 power delta: 4
Sat Oct  7 21:33:37 2017 kern.warn kernel: [  570.678661] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush

after re-enabling interface:

Sat Oct  7 21:35:20 2017 kern.err kernel: [  611.146250] ieee80211 phy1: rt2x00queue_write_tx_frame: Error - Arrived at non-free entry in the non-full queue 2

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=896#comment3575