Hello all,
I'm struggling with a problem related on ath10k drivers:
I'm using a Compex WLE600V5-27 (802.11ac) miniPCIe card for some HT
tests needed for my thesis.
I'm using ath10k drivers for this card, and backports-4.4.2, in
particular the firmware-5.bin_10.2.4.70.54 because it seem to be the
more recent.
I've connected in mesh mode the WLE600V5 card with an 802.11n card
(using ath9k drivers) but looking at the station dump, the tx bitrate
is stuck on 6.0 Mbit/s for the ath10k. The ath9k one works well and
watch -n1 iw <interfacename> station dump
let me see changes of the tx rate and MCS on the ath9k during iperf
tests, but the ath10k stucks on 6.0 Mbit/s.
Then something misterious (for me) happen while the channel
assignment: the syslog is spammed by this message:
[17554.919459] ------------[ cut here ]------------
[17554.919839] WARNING: CPU: 0 PID: 0 at
/home/matteo/linux-imx6/backports4.4.2-i2CAT/net/mac80211/util.c:2621
ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211]()
[17554.919855] Modules linked in: arc4 sky2 ath10k_pci(O)
ath10k_core(O) ath(O) mac80211(O) cfg80211(O) compat(O)
[17554.919926] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O
3.14.48-g408ccb9 #4
[17554.919990] [<80015050>] (unwind_backtrace) from [<80011330>]
(show_stack+0x10/0x14)
[17554.920038] [<80011330>] (show_stack) from [<806537dc>]
(dump_stack+0x80/0x90)
[17554.920074] [<806537dc>] (dump_stack) from [<8002c578>]
(warn_slowpath_common+0x6c/0x88)
[17554.920103] [<8002c578>] (warn_slowpath_common) from [<8002c630>]
(warn_slowpath_null+0x1c/0x24)
[17554.920377] [<8002c630>] (warn_slowpath_null) from [<7f089c74>]
(ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211])
[17554.920826] [<7f089c74>] (ieee80211_calculate_rx_timestamp
[mac80211]) from [<7f07d724>] (ieee80211_rx_napi+0xcc/0x8d4
[mac80211])
[17554.921259] [<7f07d724>] (ieee80211_rx_napi [mac80211]) from
[<7f117fd0>] (ath10k_wmi_event_mgmt_rx+0x1f4/0x35c [ath10k_core])
[17554.921540] [<7f117fd0>] (ath10k_wmi_event_mgmt_rx [ath10k_core])
from [<7f10d844>] (ath10k_htc_rx_completion_handler+0x1cc/0x464
[ath10k_core])
[17554.921706] [<7f10d844>] (ath10k_htc_rx_completion_handler
[ath10k_core]) from [<7f157b4c>] (ath10k_pci_process_rx_cb+0x1ac/0x1fc
[ath10k_pci])
[17554.921773] [<7f157b4c>] (ath10k_pci_process_rx_cb [ath10k_pci])
from [<7f15b3ac>] (ath10k_ce_per_engine_service+0x5c/0x94
[ath10k_pci])
[17554.921835] [<7f15b3ac>] (ath10k_ce_per_engine_service
[ath10k_pci]) from [<7f15b464>]
(ath10k_ce_per_engine_service_any+0x80/0x88 [ath10k_pci])
[17554.921892] [<7f15b464>] (ath10k_ce_per_engine_service_any
[ath10k_pci]) from [<7f15a6d8>] (ath10k_pci_tasklet+0x24/0x5c
[ath10k_pci])
[17554.921946] [<7f15a6d8>] (ath10k_pci_tasklet [ath10k_pci]) from
[<800304c8>] (tasklet_action+0x80/0x110)
[17554.921979] [<800304c8>] (tasklet_action) from [<800306b8>]
(__do_softirq+0x10c/0x248)
[17554.922009] [<800306b8>] (__do_softirq) from [<80030a6c>]
(irq_exit+0xac/0xf4)
[17554.922042] [<80030a6c>] (irq_exit) from [<8000e904>] (handle_IRQ+0x44/0x90)
[17554.922072] [<8000e904>] (handle_IRQ) from [<800084f8>]
(gic_handle_irq+0x2c/0x5c)
[17554.922105] [<800084f8>] (gic_handle_irq) from [<80011e00>]
(__irq_svc+0x40/0x50)
[17554.922122] Exception stack(0x80917f18 to 0x80917f60)
[17554.922141] 7f00:
80917f60 000d3334
[17554.922166] 7f20: 5221e106 00000ff7 4d693c44 00000ff7 a7705010
80924060 00000001 a7705014
[17554.922190] 7f40: 8096243d 80916000 00000017 80917f60 a6aaaaab
80492940 60000013 ffffffff
[17554.922224] [<80011e00>] (__irq_svc) from [<80492940>]
(cpuidle_enter_state+0x50/0xe0)
[17554.922252] [<80492940>] (cpuidle_enter_state) from [<80492ac8>]
(cpuidle_idle_call+0xf8/0x148)
[17554.922281] [<80492ac8>] (cpuidle_idle_call) from [<8000ec48>]
(arch_cpu_idle+0x8/0x44)
[17554.922322] [<8000ec48>] (arch_cpu_idle) from [<80066648>]
(cpu_startup_entry+0xfc/0x140)
[17554.922362] [<80066648>] (cpu_startup_entry) from [<808c5b08>]
(start_kernel+0x360/0x36c)
[17554.922379] ---[ end trace 87d4775146813aed ]---
[17555.943454] ------------[ cut here ]------------
that repeat continuously...
Forcing legacy bitrates doesn't change the situation.
I made some measurements using iperf, please find it in attachment.
Other info:
root@Yazi:~# modinfo ath10k_pci
filename:
/lib/modules/3.14.48-g408ccb9/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko
firmware: ath10k/QCA9377/hw1.0/board.bin
firmware: ath10k/QCA9377/hw1.0/firmware-5.bin
firmware: ath10k/QCA6174/hw3.0/board-2.bin
firmware: ath10k/QCA6174/hw3.0/board.bin
firmware: ath10k/QCA6174/hw3.0/firmware-5.bin
firmware: ath10k/QCA6174/hw3.0/firmware-4.bin
firmware: ath10k/QCA6174/hw2.1/board-2.bin
firmware: ath10k/QCA6174/hw2.1/board.bin
firmware: ath10k/QCA6174/hw2.1/firmware-5.bin
firmware: ath10k/QCA6174/hw2.1/firmware-4.bin
firmware: ath10k/QCA988X/hw2.0/board-2.bin
firmware: ath10k/QCA988X/hw2.0/board.bin
firmware: ath10k/QCA988X/hw2.0/firmware-5.bin
firmware: ath10k/QCA988X/hw2.0/firmware-4.bin
firmware: ath10k/QCA988X/hw2.0/firmware-3.bin
firmware: ath10k/QCA988X/hw2.0/firmware-2.bin
firmware: ath10k/QCA988X/hw2.0/firmware.bin
license: Dual BSD/GPL
description: Driver support for Atheros QCA988X PCIe devices
author: Qualcomm Atheros
version: backported from Linux (v4.4.2-0-g1cb8570) using
backports v4.4.2-1-0-gbec4037
srcversion: EBB3D4E36DE49B7EC8057D0
alias: pci:v0000168Cd00000042sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000040sv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i*
alias: pci:v0000168Cd00000041sv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i*
depends: ath10k_core,compat
vermagic: 3.14.48-g408ccb9 SMP mod_unload modversions ARMv7 p2v8
parm: irq_mode:0: auto, 1: legacy, 2: msi (default: 0) (uint)
parm: reset_mode:0: auto, 1: warm only (default: 0) (uint)
I don't know if it's only a problem of iw station dump that can't show
the tx rate, but the spammed syslog honestly warn me...
How shall I check what's wrong and see the HT work?
Thanks a lot!
Matteo
+++++++++++++++++++
#CONFIGUTRATION#
+++++++++++++++++++
##### HOST YAZI 192.168.149.87 with ath10k #####
root@Yazi:~# iw dev wlan1 interface add mp1 type mp
root@Yazi:~# iw dev mp1 set channel 149 HT40+
root@Yazi:~# ifconfig mp1 192.168.149.87
root@Yazi:~# iw dev mp1 mesh join m149h
root@Yazi:~# iw mp1 station dump
Station 04:f0:21:0a:61:eb (on mp1)
inactive time: 870 ms
rx bytes: 4635
rx packets: 75
tx bytes: 302
tx packets: 3
tx retries: 0
tx failed: 0
signal: -66 dBm
signal avg: -68 dBm
tx bitrate: 6.0 MBit/s
mesh llid: 33894
mesh plid: 35428
mesh plink: ESTAB
authorized: yes
authenticated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
#### HOST GATEWORKS 192.168.149.54 with ath9k ####
root@gateworks:~# iw dev wlan0 interface add mp0 type mp
root@gateworks:~# iw dev mp0 set channel 149 HT40+
root@gateworks:~# ifconfig mp0 192.168.149.54
root@gateworks:~# iw dev mp0 mesh join m149h
root@gateworks:~# iw mp0 station dump
Station 04:f0:21:15:ac:77 (on mp0)
inactive time: 1000 ms
rx bytes: 1709
rx packets: 22
tx bytes: 260
tx packets: 3
tx retries: 23
tx failed: 3
signal: -80 dBm
signal avg: -77 dBm
tx bitrate: 19.5 MBit/s MCS 2
mesh llid: 35428
mesh plid: 33894
mesh plink: ESTAB
authorized: yes
authenticated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
###CAPTURE BROADCAST POLL MESSAGES -> file BroadcastPoll149###
++++++++++++++++++++++++++++++++++
###IPERF WITHOUT ANY HT OPTOPNS###
++++++++++++++++++++++++++++++++++
###DELETED BOTH INTERFACES AND CREATED NEW TWO WITHOUT THE HT40+ OPTION###
Used wlan1 instead wlan0 on the host Gateworks
Iperf+Capture
.87 client
.54 server
file Iperf149_3
.54 change its bitrates from 6 to 18, .87 stuck on 6
#On .54 (server)
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.54 port 5001 connected with 192.168.149.87 port 53471
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 3] 0.0-10.0 sec 17.9 MBytes 14.9 Mbits/sec 0.193 ms 3/12762 (0.024%)
[ 3] 0.0-10.0 sec 4 datagrams received out-of-order
#On .87 (client)
Client connecting to 192.168.149.54, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 53471 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 17.9 MBytes 15.0 Mbits/sec
[ 3] Sent 12763 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 17.9 MBytes 14.9 Mbits/sec 0.192 ms 3/12762 (0.024%)
[ 3] 0.0-10.0 sec 4 datagrams received out-of-order
++++++++++++++++++++++++++++++++++++++++++++++++++++++
.87 Server
.54 Client
file Iperf149_4
.54 change its bitrates from 6 to 18 and then 36, .87 stuck on 6
#On .87 (Server)
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 5001 connected with 192.168.149.54 port 52418
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 3] 0.0-10.0 sec 16.4 MBytes 13.7 Mbits/sec 2.684 ms 6/11686 (0.051%)
[ 3] 0.0-10.0 sec 7 datagrams received out-of-order
#On .54 (Client)
------------------------------------------------------------
Client connecting to 192.168.149.87, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.54 port 52418 connected with 192.168.149.87 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 16.4 MBytes 13.7 Mbits/sec
[ 3] Sent 11687 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 16.4 MBytes 13.7 Mbits/sec 2.683 ms 6/11686 (0.051%)
[ 3] 0.0-10.0 sec 7 datagrams received out-of-order
++++++++++++++++++++++++++++++++++
###IPERF WITH HT20 OPTOPNS###
++++++++++++++++++++++++++++++++++
###DELETED AND REBUILTED TWO INTERFACES WITH HT20 OPTION###
in iw <interfacename> station dump .54 shows the bitrates with the MCS,
.87 doesn't do the same, and bitrate is always 6Mbps
Again Iperf with capture
.54 Server
.87 Client
file Iperf149_5
.54 changes its bitrates in 19.5, 13 and 65MCS7
.87 stuck on 6Mbps
#On .54 (Server)
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.54 port 5001 connected with 192.168.149.87 port 58654
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 3] 0.0- 9.9 sec 23.7 MBytes 20.2 Mbits/sec 0.433 ms 0/16936 (0%)
[ 3] 0.0- 9.9 sec 1 datagrams received out-of-order
#On .87 (Client)
Client connecting to 192.168.149.54, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 58654 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 23.7 MBytes 19.9 Mbits/sec
[ 3] Sent 16937 datagrams
[ 3] Server Report:
[ 3] 0.0- 9.9 sec 23.7 MBytes 20.2 Mbits/sec 0.433 ms 0/16936 (0%)
[ 3] 0.0- 9.9 sec 1 datagrams received out-of-order
++++++++++++++++++++++++++++++++++++++++++++++++++
.87 Server
.54 Client
file Iperf149_6
.54 changes bitrates 26MCS3, 65 MCS7
.87 6Mbps
#On .87 (Server)
[ 4] local 192.168.149.87 port 5001 connected with 192.168.149.54 port 37926
[ 4] 0.0-10.1 sec 14.8 MBytes 12.3 Mbits/sec 4.649 ms 723/11288 (6.4%)
[ 4] 0.0-10.1 sec 4 datagrams received out-of-order
#On .54 (Client)
Client connecting to 192.168.149.87, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.54 port 37926 connected with 192.168.149.87 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 15.8 MBytes 13.3 Mbits/sec
[ 3] Sent 11289 datagrams
[ 3] Server Report:
[ 3] 0.0-10.1 sec 14.8 MBytes 12.3 Mbits/sec 4.649 ms 723/11288 (6.4%)
[ 3] 0.0-10.1 sec 4 datagrams received out-of-order
++++++++++++++++++++
###FORCE TEST###
++++++++++++++++++++
10 secs 50M
.87 Server
.54 Client
file Iperf149_7
#On .87 (Server)
[ 3] local 192.168.149.87 port 5001 connected with 192.168.149.54 port 48708
[ 3] 0.0-10.5 sec 15.6 MBytes 12.4 Mbits/sec 32.743 ms 197/11300 (1.7%)
[ 3] 0.0-10.5 sec 6 datagrams received out-of-order
#On .54 (Client)
Client connecting to 192.168.149.87, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.54 port 48708 connected with 192.168.149.87 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.4 sec 15.8 MBytes 12.8 Mbits/sec
[ 3] Sent 11301 datagrams
[ 3] Server Report:
[ 3] 0.0-10.5 sec 15.6 MBytes 12.4 Mbits/sec 32.742 ms 197/11300 (1.7%)
[ 3] 0.0-10.5 sec 6 datagrams received out-of-order
++++++++++++++++++++++++++++++++++++++++++++
10 secs 50M
.54 Server
.87 Client
file Iperf149_8
#On .54 (Server)
[ 3] local 192.168.149.54 port 5001 connected with 192.168.149.87 port 48488
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 3] 0.0-10.0 sec 29.5 MBytes 24.7 Mbits/sec 1.435 ms 8/21055 (0.038%)
[ 3] 0.0-10.0 sec 1 datagrams received out-of-order
#On .87 (Client)
[ 3] local 192.168.149.87 port 48488 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 29.5 MBytes 24.7 Mbits/sec
[ 3] Sent 21056 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 29.5 MBytes 24.7 Mbits/sec 1.434 ms 8/21055 (0.038%)
[ 3] 0.0-10.0 sec 1 datagrams received out-of-order
++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++
10 secs 100M
.54 Server
.87 Client
file Iperf149_9
#On .54 (Server)
[ 4] local 192.168.149.54 port 5001 connected with 192.168.149.87 port 52895
[ 4] 0.0-10.0 sec 40.3 MBytes 33.8 Mbits/sec 1.108 ms 26/28784 (0.09%)
[ 4] 0.0-10.0 sec 11 datagrams received out-of-order
#On .87 (Client)
[ 3] local 192.168.149.87 port 52895 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 40.4 MBytes 33.8 Mbits/sec
[ 3] Sent 28785 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 40.3 MBytes 33.8 Mbits/sec 1.107 ms 26/28784 (0.09%)
[ 3] 0.0-10.0 sec 11 datagrams received out-of-order
+++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++
10 secs 150M
.54 Server
.87 Client
file Iperf149_10
#On .54 (Server)
[ 3] local 192.168.149.54 port 5001 connected with 192.168.149.87 port 43174
[ 3] 0.0-10.0 sec 40.6 MBytes 34.1 Mbits/sec 1.108 ms 48/29026 (0.17%)
[ 3] 0.0-10.0 sec 11 datagrams received out-of-order
#On .87 (Client)
[ 3] local 192.168.149.87 port 43174 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 40.7 MBytes 34.1 Mbits/sec
[ 3] Sent 29027 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 40.6 MBytes 34.1 Mbits/sec 1.108 ms 48/29026 (0.17%)
[ 3] 0.0-10.0 sec 11 datagrams received out-of-order
34.1Mbps seems to be the max in HT20; looking the station dump .87 shows 6Mbps, .54 26MCS3
(that's ok for HT20 without the SGI), however the max nominal throughput for HT20 nonSGI
and 1 spatial stream is 65M (using a 64QAM).
.54 seems to stuch on MCS3 (watch -n<timeinterval> iw <interfacename> station dump)
+++++++++++++++++++++++++++++++++++++++++
###IPERF WITH HT40+ OPTION###
+++++++++++++++++++++++++++++++++++++++++
###DELETED AND REBUILTED TWO INTERFACES WITH HT40+ OPTION###
.54 Server
.87 Client
file Iperf149_11
#On the .87 (Client)
root@Yazi:~# iperf -c 192.168.149.54 -u -t10 -b150M
------------------------------------------------------------
Client connecting to 192.168.149.54, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 59120 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 54.2 MBytes 45.4 Mbits/sec
[ 3] Sent 38647 datagrams
[ 3] Server Report:
[ 3] 0.0- 9.9 sec 54.1 MBytes 46.0 Mbits/sec 0.887 ms 46/38646 (0.12%)
[ 3] 0.0- 9.9 sec 29 datagrams received out-of-order
root@Yazi:~# iperf -c 192.168.149.54 -u -t10 -b250M
------------------------------------------------------------
Client connecting to 192.168.149.54, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 54305 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 56.5 MBytes 47.4 Mbits/sec
[ 3] Sent 40289 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 56.4 MBytes 47.3 Mbits/sec 0.659 ms 80/40288 (0.2%)
[ 3] 0.0-10.0 sec 1 datagrams received out-of-order
root@Yazi:~# iperf -c 192.168.149.54 -u -t10 -b250M
------------------------------------------------------------
Client connecting to 192.168.149.54, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.149.87 port 42853 connected with 192.168.149.54 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 56.3 MBytes 47.2 Mbits/sec
[ 3] Sent 40154 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 56.2 MBytes 47.1 Mbits/sec 0.666 ms 81/40153 (0.2%)
[ 3] 0.0-10.0 sec 1 datagrams received out-of-order
#47.4 seems to be the limit, but .54 changes the bit rates, the MCS and even the GI
#.87 stuck on 6
+++++++++++++++++++++++++++++++++++++++++++
###Change roles with the same parameters###
.87 Server
.54 Client
[ 3] local 192.168.149.54 port 59978 connected with 192.168.149.87 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 15.4 MBytes 12.9 Mbits/sec
[ 3] Sent 11013 datagrams
[ 3] Server Report:
[ 3] 0.0-10.3 sec 13.3 MBytes 10.9 Mbits/sec 5.268 ms 1514/11012 (14%)
[ 3] 0.0-10.3 sec 19 datagrams received out-of-order
By setting the channel
iw dev <interfacename> set channel <channel> [HT20|HT40-|HT40+]
the syslog is spammed with the repetition of
[17554.919459] ------------[ cut here ]------------
[17554.919839] WARNING: CPU: 0 PID: 0 at /home/matteo/linux-imx6/backports4.4.2-i2CAT/net/mac80211/util.c:2621 ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211]()
[17554.919855] Modules linked in: arc4 sky2 ath10k_pci(O) ath10k_core(O) ath(O) mac80211(O) cfg80211(O) compat(O)
[17554.919926] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O 3.14.48-g408ccb9 #4
[17554.919990] [<80015050>] (unwind_backtrace) from [<80011330>] (show_stack+0x10/0x14)
[17554.920038] [<80011330>] (show_stack) from [<806537dc>] (dump_stack+0x80/0x90)
[17554.920074] [<806537dc>] (dump_stack) from [<8002c578>] (warn_slowpath_common+0x6c/0x88)
[17554.920103] [<8002c578>] (warn_slowpath_common) from [<8002c630>] (warn_slowpath_null+0x1c/0x24)
[17554.920377] [<8002c630>] (warn_slowpath_null) from [<7f089c74>] (ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211])
[17554.920826] [<7f089c74>] (ieee80211_calculate_rx_timestamp [mac80211]) from [<7f07d724>] (ieee80211_rx_napi+0xcc/0x8d4 [mac80211])
[17554.921259] [<7f07d724>] (ieee80211_rx_napi [mac80211]) from [<7f117fd0>] (ath10k_wmi_event_mgmt_rx+0x1f4/0x35c [ath10k_core])
[17554.921540] [<7f117fd0>] (ath10k_wmi_event_mgmt_rx [ath10k_core]) from [<7f10d844>] (ath10k_htc_rx_completion_handler+0x1cc/0x464 [ath10k_core])
[17554.921706] [<7f10d844>] (ath10k_htc_rx_completion_handler [ath10k_core]) from [<7f157b4c>] (ath10k_pci_process_rx_cb+0x1ac/0x1fc [ath10k_pci])
[17554.921773] [<7f157b4c>] (ath10k_pci_process_rx_cb [ath10k_pci]) from [<7f15b3ac>] (ath10k_ce_per_engine_service+0x5c/0x94 [ath10k_pci])
[17554.921835] [<7f15b3ac>] (ath10k_ce_per_engine_service [ath10k_pci]) from [<7f15b464>] (ath10k_ce_per_engine_service_any+0x80/0x88 [ath10k_pci])
[17554.921892] [<7f15b464>] (ath10k_ce_per_engine_service_any [ath10k_pci]) from [<7f15a6d8>] (ath10k_pci_tasklet+0x24/0x5c [ath10k_pci])
[17554.921946] [<7f15a6d8>] (ath10k_pci_tasklet [ath10k_pci]) from [<800304c8>] (tasklet_action+0x80/0x110)
[17554.921979] [<800304c8>] (tasklet_action) from [<800306b8>] (__do_softirq+0x10c/0x248)
[17554.922009] [<800306b8>] (__do_softirq) from [<80030a6c>] (irq_exit+0xac/0xf4)
[17554.922042] [<80030a6c>] (irq_exit) from [<8000e904>] (handle_IRQ+0x44/0x90)
[17554.922072] [<8000e904>] (handle_IRQ) from [<800084f8>] (gic_handle_irq+0x2c/0x5c)
[17554.922105] [<800084f8>] (gic_handle_irq) from [<80011e00>] (__irq_svc+0x40/0x50)
[17554.922122] Exception stack(0x80917f18 to 0x80917f60)
[17554.922141] 7f00: 80917f60 000d3334
[17554.922166] 7f20: 5221e106 00000ff7 4d693c44 00000ff7 a7705010 80924060 00000001 a7705014
[17554.922190] 7f40: 8096243d 80916000 00000017 80917f60 a6aaaaab 80492940 60000013 ffffffff
[17554.922224] [<80011e00>] (__irq_svc) from [<80492940>] (cpuidle_enter_state+0x50/0xe0)
[17554.922252] [<80492940>] (cpuidle_enter_state) from [<80492ac8>] (cpuidle_idle_call+0xf8/0x148)
[17554.922281] [<80492ac8>] (cpuidle_idle_call) from [<8000ec48>] (arch_cpu_idle+0x8/0x44)
[17554.922322] [<8000ec48>] (arch_cpu_idle) from [<80066648>] (cpu_startup_entry+0xfc/0x140)
[17554.922362] [<80066648>] (cpu_startup_entry) from [<808c5b08>] (start_kernel+0x360/0x36c)
[17554.922379] ---[ end trace 87d4775146813aed ]---
[17555.943454] ------------[ cut here ]------------
As soon as the HT40+ interface is deleted , it stops
