[FS#1263] Archer C7 Periodic 2.4G WiFi Failure (ath10k_pci failed to parse phyerr tlv payload at byte 0)

[LEDE Bugs]

The following task has a new comment added:

FS#1263 - Archer C7 Periodic 2.4G WiFi Failure (ath10k_pci failed to parse phyerr tlv payload at byte 0)
User who did this - Ian MacDonald (imac)

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Unfortunately I posted a day too soon, as the 2.4G dropped again today.  At then end of dmesg a bunch of these:

 [9168557.004798] ath: phy1: Unable to reset channel, reset status -5
 [9241466.313947] ath: phy1: Unable to reset channel, reset status -5
 [9254122.212029] ath: phy1: Unable to reset channel, reset status -5
 [9335809.580928] ath: phy1: Unable to reset channel, reset status -5
 [9556895.581143] ath: phy1: Unable to reset channel, reset status -5
 [9582029.460103] ath: phy1: Unable to reset channel, reset status -5
 [9583890.920623] ath: phy1: Unable to reset channel, reset status -5
 [9831339.046998] ath: phy1: Unable to reset channel, reset status -5
 [9842621.140994] ath: phy1: Unable to reset channel, reset status -5
 [9861604.741015] ath: phy1: Unable to reset channel, reset status -5
 [10031427.853988] ath: phy1: Unable to reset channel, reset status -5
 [10075998.458644] ath: phy1: Unable to reset channel, reset status -5
 [10210275.723499] ath: phy1: Unable to reset channel, reset status -5

In the logs, you can see the three 2.4G devices drop off (wlan1) and the two 5G devices make it to the next handshake. 

 Wed Mar 14 23:15:11 2018 daemon.info hostapd: wlan0: STA a0:cc:2b:15:20:97 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:15:12 2018 daemon.info hostapd: wlan1: STA 70:62:b8:93:98:b8 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:15:12 2018 daemon.info hostapd: wlan1: STA 14:91:82:50:2b:a1 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:15:12 2018 daemon.info hostapd: wlan0: STA b8:f6:b1:a6:c4:e0 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:15:12 2018 daemon.info hostapd: wlan1: STA 6c:ad:f8:4b:a3:52 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:15:34 2018 daemon.info odhcpd[856]: Using a RA lifetime of 0 seconds on br-lan
 Wed Mar 14 23:18:16 2018 daemon.info hostapd: wlan1: STA 6c:ad:f8:4b:a3:52 IEEE 802.11: disconnected due to excessive missing ACKs
 Wed Mar 14 23:18:16 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED 6c:ad:f8:4b:a3:52
 Wed Mar 14 23:18:46 2018 daemon.info hostapd: wlan1: STA 6c:ad:f8:4b:a3:52 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
 Wed Mar 14 23:19:59 2018 daemon.info odhcpd[856]: Using a RA lifetime of 0 seconds on br-lan
 Wed Mar 14 23:20:17 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED 14:91:82:50:2b:a1
 Wed Mar 14 23:20:17 2018 daemon.info hostapd: wlan1: STA 14:91:82:50:2b:a1 IEEE 802.11: disassociated due to inactivity
 Wed Mar 14 23:20:18 2018 daemon.info hostapd: wlan1: STA 14:91:82:50:2b:a1 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
 Wed Mar 14 23:20:36 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED 70:62:b8:93:98:b8
 Wed Mar 14 23:20:36 2018 daemon.info hostapd: wlan1: STA 70:62:b8:93:98:b8 IEEE 802.11: disassociated due to inactivity
 Wed Mar 14 23:20:37 2018 daemon.info hostapd: wlan1: STA 70:62:b8:93:98:b8 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
 Wed Mar 14 23:23:38 2018 daemon.info odhcpd[856]: Using a RA lifetime of 0 seconds on br-lan
 Wed Mar 14 23:25:11 2018 daemon.info hostapd: wlan0: STA a0:cc:2b:15:20:97 WPA: group key handshake completed (RSN)
 Wed Mar 14 23:25:12 2018 daemon.info hostapd: wlan0: STA b8:f6:b1:a6:c4:e0 WPA: group key handshake completed (RSN)

Back to resetting wifi nightly for now via cron. 

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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1263#comment4476