[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 - Wieslaw Hodurek (wjesiek)

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I have the same problem with Asus RT-N14U on LEDE Reboot 17.01-SNAPSHOT r3566-98c003e.  Router hangs up very quickly, only reboot helps.

Thu Nov  9 22:00:32 2017 daemon.info dnsmasq-dhcp[1498]: DHCPREQUEST(br-lan) 192.168.1.102 00:01:02:03:04:05 
Thu Nov  9 22:00:32 2017 daemon.info dnsmasq-dhcp[1498]: DHCPACK(br-lan) 192.168.1.192 00:01:02:03:04:05 M8
Thu Nov  9 22:03:41 2017 daemon.info odhcpd[925]: Using a RA lifetime of 0 seconds on br-lan
Thu Nov  9 22:03:50 2017 daemon.notice odhcpd[925]: Got DHCPv6 request
Thu Nov  9 22:07:23 2017 daemon.info odhcpd[925]: Using a RA lifetime of 0 seconds on br-lan
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.691721] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.710281] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.728830] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.747365] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.765907] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.784444] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.802982] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.821522] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.840055] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.858591] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.877124] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.895658] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.914192] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.932727] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.951262] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.969803] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:33 2017 kern.err kernel: [101957.988338] ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2
Thu Nov  9 22:07:56 2017 daemon.info hostapd: wlan0: STA 10:20:30:40:50:60 IEEE 802.11: authenticated
Thu Nov  9 22:07:56 2017 daemon.info hostapd: wlan0: STA 10:20:30:40:50:60 IEEE 802.11: associated (aid 2)
Thu Nov  9 22:07:56 2017 daemon.notice hostapd: wlan0: AP-STA-CONNECTED 10:20:30:40:50:60
Thu Nov  9 22:07:56 2017 daemon.info hostapd: wlan0: STA 10:20:30:40:50:60 WPA: pairwise key handshake completed (RSN)

My wireless settings:

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11g'
	option path 'platform/10180000.wmac'
	option noscan '1'
	option country 'PL'
	option htmode 'HT40'
	option channel '11'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option ssid 'network'
	option encryption 'psk2+ccmp'
	option key 'password'
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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#comment3869