I have a ASUS ac58u with OpenWRT 17.09.2.
I tried to test upload data from two notebooks(ax200, 8265ac) to NAS witch connected to LAN in a same time.
Sometimes, the wifi signal lost and I found logs:
[24463.057911] ------------[ cut here ]------------
[24463.057965] WARNING: CPU: 0 PID: 0 at /builder/shared-workdir/build/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/linux-ipq40xx_generic/ath10k-ct-smallbuffers/ath10k-ct-2019-09-09-5e8cd86f/ath10k-4.19/htt_rx.c:1206 0xbf23dca0 [ath10k_core@bf222000+0x52000]
[24463.062414] Modules linked in: pppoe ppp_async ath10k_pci ath10k_core ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 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_FLOWOFFLOAD xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables hwmon crc_ccitt compat ledtrig_usbport nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 leds_gpio xhci_plat_hcd xhci_pci xhci_hcd dwc3 dwc3_of_simple gpio_button_hotplug
[24463.130383] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.171 #0
[24463.152572] Hardware name: Generic DT based system
[24463.158830] Function entered at [<c030e2a8>] from [<c030a7a8>]
[24463.163512] Function entered at [<c030a7a8>] from [<c073fe14>]
[24463.169329] Function entered at [<c073fe14>] from [<c031dd34>]
[24463.175144] Function entered at [<c031dd34>] from [<c031de00>]
[24463.180958] Function entered at [<c031de00>] from [<bf23dca0>]
[24463.186807] Function entered at [<bf23dca0>] from [<bf23f1a0>]
[24463.192593] Function entered at [<bf23f1a0>] from [<bf23f960>]
[24463.198406] Function entered at [<bf23f960>] from [<bf27830c>]
[24463.204229] Function entered at [<bf27830c>] from [<c063c680>]
[24463.210040] Function entered at [<c063c680>] from [<c0301520>]
[24463.215856] Function entered at [<c0301520>] from [<c0321e38>]
[24463.221672] Function entered at [<c0321e38>] from [<c035b318>]
[24463.227488] Function entered at [<c035b318>] from [<c030140c>]
[24463.233302] Function entered at [<c030140c>] from [<c030b30c>]
[24463.239119] Exception stack(0xc0a01f40 to 0xc0a01f88)
[24463.244940] 1f40: 00000001 00000000 00000000 c0313960 ffffe000 c0a03cb8 c0a03c6c 00000000
[24463.250066] 1f60: 00000000 00000001 c7dfce00 c092da28 c0a01f88 c0a01f90 c0307d88 c0307d8c
[24463.258219] 1f80: 60000013 ffffffff
[24463.266372] Function entered at [<c030b30c>] from [<c0307d8c>]
[24463.269675] Function entered at [<c0307d8c>] from [<c0352068>]
[24463.275577] Function entered at [<c0352068>] from [<c0352388>]
[24463.281394] Function entered at [<c0352388>] from [<c0900c04>]
[24463.287282] ---[ end trace 15cc441752d7e278 ]---
Then, I need to restart the radio.
But I tried several times, and I only got this once.