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From: Arend Van Spriel <arend.vanspriel@broadcom.com>
To: Stefan Wahren <wahrenst@gmx.net>, Arend van Spriel <aspriel@gmail.com>, Franky Lin <franky.lin@broadcom.com>, Hante Meuleman <hante.meuleman@broadcom.com>
CC: <linux-wireless@vger.kernel.org>, <brcm80211-dev-list.pdl@broadcom.com>, <SHA-cyfmac-dev-list@infineon.com>, Hector Martin <marcan@marcan.st>, Kalle Valo <kvalo@kernel.org>
Date: Fri, 22 Dec 2023 16:28:46 +0100
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In-Reply-To: <18c921b1690.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
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Subject: Re: brcmfmac: Unexpected brcmf_set_channel: set chanspec 0xd022 fail, reason -52 - Part 2
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On December 22, 2023 4:18:19 PM Arend Van Spriel 
<arend.vanspriel@broadcom.com> wrote:

> On December 21, 2023 7:40:46 PM Stefan Wahren <wahrenst@gmx.net> wrote:
>
>> Hi Arend,
>>
>> Am 21.12.23 um 18:47 schrieb Arend Van Spriel:
>>>
>>>
>>> On November 18, 2023 12:43:24 PM Stefan Wahren <wahrenst@gmx.net> wrote:
>>>
>>>> Hi Arend,
>>>>
>>>> Am 15.11.23 um 21:09 schrieb Arend van Spriel:
>>>>> On 11/15/2023 7:35 PM, Stefan Wahren wrote:
>>>>>> Am 15.11.23 um 10:34 schrieb Arend van Spriel:
>>>>>>> On 11/13/2023 10:02 PM, Stefan Wahren wrote:
>>>>>>>> Hi Arend,
>>>>>>>>
>>>>>>>> Am 13.11.23 um 10:11 schrieb Arend van Spriel:
>>>>>>>>> On 11/11/2023 9:30 PM, Stefan Wahren wrote:
>>>>>>>>>> Am 11.11.23 um 19:29 schrieb Stefan Wahren:
>>>>>>>>>>>
>>>>>>>>>>> Am 11.11.23 um 18:25 schrieb Arend Van Spriel:
>>>>>>>>>>>> On November 11, 2023 5:48:46 PM Stefan Wahren <wahrenst@gmx.net>
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Again look like these are disabled channels. At least chanspec
>>>>>>>>>>>> 0xd022
>>>>>>>>>>>> is 5G channel 34. You say you get this only once so not every 60
>>>>>>>>>>>> seconds?
>>>>>>>>>>> I get this everytime i trigger a reconnect to the wifi
>>>>>>>>>>> network, so
>>>>>>>>>>> not
>>>>>>>>>>> periodically (checked that). Strangely the initial automatic
>>>>>>>>>>> connect
>>>>>>>>>>> doesn't trigger this errors.
>>>>>>>>>> I additionally placed a WARN_ON_ONCE after the error log and
>>>>>>>>>> enabled the
>>>>>>>>>> firmware error log of brcmf_fil_cmd_data(). Maybe this helps.
>>>>>>>>>
>>>>>>>>> It does a bit. At least it shows this is happening with the
>>>>>>>>> dump_survey (again). I don't really understand why though. It
>>>>>>>>> implies
>>>>>>>>> the channel is not disabled, but unclear why. The channel flags are
>>>>>>>>> changed in brcmf_construct_chaninfo() so we probably should focus
>>>>>>>>> debug on that function.
>>>>>>>>
>>>>>>>> i placed a pr_err at the start of brcmf_construct_chaninfo and
>>>>>>>> another
>>>>>>>> pr_err into the for loop before the "if (channel->orig_flags &
>>>>>>>> IEEE80211_CHAN_DISABLED) continue".
>>>>>>>>
>>>>>>>> pr_err("%s: Ch num %d, chanspec 0x%x, orig_flags: %x.\n", __func__,
>>>>>>>> ch.control_ch_num, ch.chspec, channel->orig_flags);
>>>>>>>>
>>>>>>>> It seems that brcmf_construct_chaninfo is called two times, but the
>>>>>>>> results are different. I could find 0xd090 in the first run, but
>>>>>>>> not in
>>>>>>>> second. The other chanspecs doesn't seem to occur in both runs. No
>>>>>>>> idea
>>>>>>>> what's going on here.
>>>>>>>
>>>>>>> Can you print all wiphy band channels before exiting
>>>>>>> brcmf_construct_chaninfo() and print both channel->orig_flags and
>>>>>>> channel->flags?
>>>>>>
>>>>>> Sure. It seems that in the first call of brcmf_construct_chaninfo the
>>>>>> channel 144 is not disabled, but in the second.
>>>>>
>>>>> I am a bit confused. So the chanspec as mentioned in this email
>>>>> subject is no longer observed, but you still see failure in
>>>>> brcmf_set_channel() for other chanspecs?
>>>>
>>>> before we dive deeper into this let me summarize my observations from
>>>> the beginning. From my understanding the errors are triggered for the 5
>>>> GHz channels 34, 38, 42, 46, 144 (chanspec: 0xd022, 0xd026, 0xd02a,
>>>> 0xd090). So i would focus my observations on those.
>>>>
>>>> As you said that the channel flags are set in brcmf_construct_chaninfo()
>>>> i dump them, here is the output of the first call:
>>>>
>>>> [    8.785850] brcmfmac: 5 GHz: 0: hw_value 34: orig_flags: 00080000,
>>>> flags 00000001
>>>> [    8.785861] brcmfmac: 5 GHz: 2: hw_value 38: orig_flags: 00080000,
>>>> flags 00000001
>>>> [    8.785872] brcmfmac: 5 GHz: 4: hw_value 42: orig_flags: 00080000,
>>>> flags 00000001
>>>> [    8.785882] brcmfmac: 5 GHz: 6: hw_value 46: orig_flags: 00080000,
>>>> flags 00000001
>>>> [    8.785974] brcmfmac: 5 GHz: 23: hw_value 144: orig_flags: 00080000,
>>>> flags 0000011a
>>>>
>>>> All of them except 144 are disabled via flags. Btw wpa_supplicant is
>>>> configured to country DE within the configuration.
>>>>
>>>> The second and last time brcmf_construct_chaninfo() is called is a few
>>>> seconds later during boot, we get the following:
>>>>
>>>> [   12.490877] brcmfmac: 5 GHz: 0: hw_value 34: orig_flags: 00080000,
>>>> flags 00000001
>>>> [   12.490891] brcmfmac: 5 GHz: 2: hw_value 38: orig_flags: 00080000,
>>>> flags 00000001
>>>> [   12.490904] brcmfmac: 5 GHz: 4: hw_value 42: orig_flags: 00080000,
>>>> flags 00000001
>>>> [   12.490918] brcmfmac: 5 GHz: 6: hw_value 46: orig_flags: 00080000,
>>>> flags 00000001
>>>> [   12.491031] brcmfmac: 5 GHz: 23: hw_value 144: orig_flags: 00080000,
>>>> flags 00000001
>>>>
>>>> Now all of them are disabled via flags.
>>>>
>>>> So after that i trigger the reconnect to the same 5 GHz network as
>>>> before. brcmf_construct_chaninfo is never called again, but at the time
>>>> brcmf_set_channel is called the flags for these channels are completely
>>>> different:
>>>>
>>>> [   90.010002] brcmfmac: brcmf_set_channel: set chanspec 0xd022 fail,
>>>> reason -52
>>>> [   90.010017] brcmfmac: hw_value 34, orig_flags: 00080000, flags
>>>> 00080220
>>>> [   90.120007] ieee80211 phy0: brcmf_fil_cmd_data: Firmware error: (-20)
>>>> [   90.120038] brcmfmac: brcmf_set_channel: set chanspec 0xd026 fail,
>>>> reason -52
>>>> [   90.120053] brcmfmac: hw_value 38, orig_flags: 00080000, flags
>>>> 00080200
>>>> [   90.230029] ieee80211 phy0: brcmf_fil_cmd_data: Firmware error: (-20)
>>>> [   90.230058] brcmfmac: brcmf_set_channel: set chanspec 0xd02a fail,
>>>> reason -52
>>>> [   90.230073] brcmfmac: hw_value 42, orig_flags: 00080000, flags
>>>> 00080200
>>>> [   90.340042] ieee80211 phy0: brcmf_fil_cmd_data: Firmware error: (-20)
>>>> [   90.340071] brcmfmac: brcmf_set_channel: set chanspec 0xd02e fail,
>>>> reason -52
>>>> [   90.340086] brcmfmac: hw_value 46, orig_flags: 00080000, flags
>>>> 00080210
>>>> [   92.100073] ieee80211 phy0: brcmf_fil_cmd_data: Firmware error: (-20)
>>>> [   92.100110] brcmfmac: brcmf_set_channel: set chanspec 0xd090 fail,
>>>> reason -52
>>>> [   92.100126] brcmfmac: hw_value 144, orig_flags: 00080000, flags
>>>> 00080118
>>>>
>>>> Where does these new flags come from? It's clear that these doesn't come
>>>> from brcmf_construct_chaninfo(). So what manipulates the flags
>>>> afterwards? Shouldn't brcmf_construct_chaninfo() called on reconnect?
>>>
>>> I suspect it is not the driver, but net/wireless/reg.c. Could you
>>> define DEBUG in top of that file and build cfg80211.ko with that. Or
>>> if you have CONFIG_DYNAMIC_DEBUG enable debug prints for reg.c through
>>> sysfs [1]
>> Sure, this is a more recent Linux 6.7 and the disconnect is at uptime
>> ~316s followed by the reconnect:
>>
>> [    0.000000] Booting Linux on physical CPU 0x0
>> [    0.000000] Linux version 6.7.0-rc6-00022-g55cb5f43689d-dirty
>> (stefanw@stefanw-SCHENKER) (arm-linux-gnueabihf-gcc (GCC) 11.3.1
>> 20220604 [releases/gcc-11 revision
>> 591c0f4b92548e3ae2e8173f4f93984b1c7f62bb], GNU ld
>> (Linaro_Binutils-2022.06) 2.37.20220122) #175 SMP Thu Dec 21 19:15:10
>> CET 2023
>> [    0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7),
>> cr=10c5383d
>> [    0.000000] CPU: div instructions available: patching division code
>> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
>> instruction cache
>> [    0.000000] OF: fdt: Machine model: Raspberry Pi 3 Model B Plus Rev 1.3
>> ...
>> [    9.538797] cfg80211: Loading compiled-in X.509 certificates for
>> regulatory database
>> [    9.699412] usb 1-1.3: USB disconnect, device number 4
>> [    9.716116] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
>> [    9.760066] brcmfmac: brcmf_fw_alloc_request: using
>> brcm/brcmfmac43455-sdio for chip BCM4345/6
>> [    9.770023] cfg80211: loaded regulatory.db is malformed or signature
>> is missing/invalid
>> [    9.770047] cfg80211: Restoring regulatory settings
>> [    9.770057] cfg80211: Kicking the queue
>> [    9.770078] cfg80211: Calling CRDA to update world regulatory domain
>> [    9.801533] Console: switching to colour dummy device 80x30
>> [    9.813535] vc4-drm soc:gpu: bound 3f400000.hvs (ops vc4_hvs_ops [vc4])
>> [    9.816895] vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4])
>> [    9.817106] vc4-drm soc:gpu: bound 3f806000.vec (ops vc4_vec_ops [vc4])
>> [    9.817282] vc4-drm soc:gpu: bound 3f004000.txp (ops vc4_txp_ops [vc4])
>> [    9.817413] vc4-drm soc:gpu: bound 3f206000.pixelvalve (ops
>> vc4_crtc_ops [vc4])
>> [    9.817538] vc4-drm soc:gpu: bound 3f207000.pixelvalve (ops
>> vc4_crtc_ops [vc4])
>> [    9.817745] vc4-drm soc:gpu: bound 3f807000.pixelvalve (ops
>> vc4_crtc_ops [vc4])
>> [    9.817864] vc4-drm soc:gpu: bound 3fc00000.v3d (ops vc4_v3d_ops [vc4])
>> [    9.823689] Bluetooth: hci0: BCM: chip id 107
>> [    9.825669] Bluetooth: hci0: BCM: features 0x2f
>> [    9.826383] [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 0
>> [    9.827278] Bluetooth: hci0: BCM4345C0
>> [    9.827291] Bluetooth: hci0: BCM4345C0 (003.001.025) build 0000
>> [    9.869190] Bluetooth: hci0: BCM4345C0
>> 'brcm/BCM4345C0.raspberrypi,3-model-b-plus.hcd' Patch
>> [    9.915063] Console: switching to colour frame buffer device 240x75
>> [    9.944429] vc4-drm soc:gpu: [drm] fb0: vc4drmfb frame buffer device
>> [    9.958353] hub 1-1:1.0: USB hub found
>> [    9.958412] hub 1-1:1.0: 4 ports detected
>> [    9.992604] onboard-usb-hub 3f980000.usb:usb-port@1: supply vdd not
>> found, using dummy regulator
>> [    9.994313] onboard-usb-hub 3f980000.usb:usb-port@1:usb-port@1:
>> supply vdd not found, using dummy regulator
>> [    9.995590] hub 1-1:1.0: USB hub found
>> [    9.995690] hub 1-1:1.0: 4 ports detected
>> [    9.998640] onboard-usb-hub 3f980000.usb:usb-port@1:usb-port@1:
>> supply vdd not found, using dummy regulator
>> [   10.086053] usbcore: registered new interface driver lan78xx
>> [   10.094129] brcmfmac: brcmf_c_process_txcap_blob: no txcap_blob
>> available (err=-2)
>> [   10.098005] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0:
>> Nov  1 2021 00:37:25 version 7.45.241 (1a2f2fa CY) FWID 01-703fd60
>> [   10.135643] cfg80211: Ignoring regulatory request set by core since
>> the driver uses its own custom regulatory domain
>> [   10.307704] usb 1-1.1: new high-speed USB device number 7 using dwc2
>> [   10.452108] hub 1-1.1:1.0: USB hub found
>> [   10.452310] hub 1-1.1:1.0: 3 ports detected
>> [   10.557660] usb 1-1.3: new low-speed USB device number 8 using dwc2
>> [   10.726697] input: PixArt Microsoft USB Optical Mouse as
>> /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.0/0003:045E:00CB.0003/input/input2
>> [   10.727785] hid-generic 0003:045E:00CB.0003: input: USB HID v1.11
>> Mouse [PixArt Microsoft USB Optical Mouse] on usb-3f980000.usb-1.3/input0
>> [   10.797638] usb 1-1.1.2: new low-speed USB device number 9 using dwc2
>> [   10.957069] input: HID 046a:0011 as
>> /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0/0003:046A:0011.0004/input/input3
>> [   11.019525] hid-generic 0003:046A:0011.0004: input: USB HID v1.11
>> Keyboard [HID 046a:0011] on usb-3f980000.usb-1.1.2/input0
>> [   11.048402] Bluetooth: hci0: BCM: features 0x2f
>> [   11.050164] Bluetooth: hci0: BCM43455 37.4MHz Raspberry Pi 3+-0190
>> [   11.050178] Bluetooth: hci0: BCM4345C0 (003.001.025) build 0382
>> [   11.324175] usb 1-1.1.1: new high-speed USB device number 10 using dwc2
>> [   11.714298] lan78xx 1-1.1.1:1.0 (unnamed net_device) (uninitialized):
>> No External EEPROM. Setting MAC Speed
>> [   11.854291] cfg80211: Pending regulatory request, waiting for it to
>> be processed...
>> [   12.099129] cfg80211: Ignoring regulatory request set by core since
>> the driver uses its own custom regulatory domain
>> [   12.099161] cfg80211: World regulatory domain updated:
>> [   12.099168] cfg80211:  DFS Master region: unset
>> [   12.099174] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [   12.099189] cfg80211:   (755000 KHz - 928000 KHz @ 2000 KHz), (N/A,
>> 2000 mBm), (N/A)
>> [   12.099201] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [   12.099213] cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz, 92000
>> KHz AUTO), (N/A, 2000 mBm), (N/A)
>> [   12.099224] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [   12.099235] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz,
>> 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
>> [   12.099248] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz,
>> 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
>> [   12.099259] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz),
>> (N/A, 2000 mBm), (0 s)
>> [   12.099269] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [   12.099280] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz),
>> (N/A, 0 mBm), (N/A)
>> [   12.101316] cfg80211: Calling CRDA for country: DE
>> [   12.125129] cfg80211: Disabling freq 2484.000 MHz
>> [   12.176440] cfg80211: Regulatory domain changed to country: DE
>> [   12.176459] cfg80211:  DFS Master region: ETSI
>> [   12.176464] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [   12.176473] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [   12.176487] cfg80211:   (5150000 KHz - 5250000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [   12.176496] cfg80211:   (5250000 KHz - 5350000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2000 mBm), (0 s)
>> [   12.176504] cfg80211:   (5470000 KHz - 5725000 KHz @ 160000 KHz),
>> (N/A, 2698 mBm), (0 s)
>> [   12.176512] cfg80211:   (5725000 KHz - 5875000 KHz @ 80000 KHz),
>> (N/A, 1397 mBm), (N/A)
>> [   12.176521] cfg80211:   (5945000 KHz - 6425000 KHz @ 160000 KHz,
>> 480000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [   12.176529] cfg80211:   (57000000 KHz - 66000000 KHz @ 2160000 KHz),
>> (N/A, 4000 mBm), (N/A)
>> [   13.893866] Adding 102396k swap on /var/swap.  Priority:-2 extents:1
>> across:102396k SS
>> [   14.530323] lan78xx 1-1.1.1:1.0 eth0: Link is Down
>> [   14.641536] Bluetooth: MGMT ver 1.22
>> [   14.689962] NET: Registered PF_ALG protocol family
>> [   14.744513] cryptd: max_cpu_qlen set to 1000
>> [   16.791666] cfg80211: Found new beacon on frequency: 5180.000 MHz (Ch
>> 36) on phy0
>> [   16.791716] cfg80211: Found new beacon on frequency: 5220.000 MHz (Ch
>> 44) on phy0
>> [   20.481971] cfg80211: Calling CRDA for country: DE
>> [   20.501082] cfg80211: Disabling freq 2484.000 MHz
>> [   20.501465] cfg80211: Regulatory domain changed to country: DE
>> [   20.501471] cfg80211:  DFS Master region: ETSI
>> [   20.501475] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [   20.501490] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [   20.501497] cfg80211:   (5150000 KHz - 5250000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [   20.501504] cfg80211:   (5250000 KHz - 5350000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2000 mBm), (0 s)
>> [   20.501511] cfg80211:   (5470000 KHz - 5725000 KHz @ 160000 KHz),
>> (N/A, 2698 mBm), (0 s)
>> [   20.501517] cfg80211:   (5725000 KHz - 5875000 KHz @ 80000 KHz),
>> (N/A, 1397 mBm), (N/A)
>> [   20.501524] cfg80211:   (5945000 KHz - 6425000 KHz @ 160000 KHz,
>> 480000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [   20.501531] cfg80211:   (57000000 KHz - 66000000 KHz @ 2160000 KHz),
>> (N/A, 4000 mBm), (N/A)
>> [   46.174010] systemd-journald[125]: Failed to set ACL on
>> /var/log/journal/0b443a02fdd340c68f8aac17d2e5ebf8/user-1000.journal,
>> ignoring: Operation not supported
>> [   84.956286] cfg80211: Verifying active interfaces after reg change
>> [  128.323869] cfg80211: Found new beacon on frequency: 2472.000 MHz (Ch
>> 13) on phy0
>> [  192.477390] cfg80211: Verifying active interfaces after reg change
>> [  316.329988] cfg80211: All devices are disconnected, going to restore
>> regulatory settings
>
> Ok. So here the disconnect happens...
>
>> [  316.330038] cfg80211: Restoring regulatory settings while preserving
>> user preference for: DE
>> [  316.330063] cfg80211: Ignoring regulatory request set by core since
>> the driver uses its own custom regulatory domain
>> [  316.330088] cfg80211: World regulatory domain updated:
>> [  316.330097] cfg80211:  DFS Master region: unset
>> [  316.330104] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [  316.330120] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (600
>> mBi, 2000 mBm), (N/A)
>> [  316.330140] cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz, 92000
>> KHz AUTO), (600 mBi, 2000 mBm), (N/A)
>> [  316.330156] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (600
>> mBi, 2000 mBm), (N/A)
>> [  316.330172] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz,
>> 160000 KHz AUTO), (600 mBi, 2000 mBm), (N/A)
>> [  316.330190] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz,
>> 160000 KHz AUTO), (600 mBi, 2000 mBm), (0 s)
>> [  316.330206] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz),
>> (600 mBi, 2000 mBm), (0 s)
>> [  316.330222] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (600
>> mBi, 2000 mBm), (N/A)
>> [  316.330238] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz),
>> (N/A, 0 mBm), (N/A)
>> [  316.330307] cfg80211: Disabling freq 2484.000 MHz
>> [  316.340457] cfg80211: Regulatory domain changed to country: DE
>> [  316.340487] cfg80211:  DFS Master region: ETSI
>> [  316.340495] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [  316.340511] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [  316.340529] cfg80211:   (5150000 KHz - 5250000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [  316.340547] cfg80211:   (5250000 KHz - 5350000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2000 mBm), (0 s)
>> [  316.340563] cfg80211:   (5470000 KHz - 5725000 KHz @ 160000 KHz),
>> (N/A, 2698 mBm), (0 s)
>> [  316.340577] cfg80211:   (5725000 KHz - 5875000 KHz @ 80000 KHz),
>> (N/A, 1397 mBm), (N/A)
>> [  316.340592] cfg80211:   (5945000 KHz - 6425000 KHz @ 160000 KHz,
>> 480000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [  316.340607] cfg80211:   (57000000 KHz - 66000000 KHz @ 2160000 KHz),
>> (N/A, 4000 mBm), (N/A)
>> [  316.340643] cfg80211: Kicking the queue
>> [  331.276421] cfg80211: Found new beacon on frequency: 5180.000 MHz (Ch
>> 36) on phy0
>> [  331.276494] cfg80211: Found new beacon on frequency: 5220.000 MHz (Ch
>> 44) on phy0
>> [  331.276562] cfg80211: Found new beacon on frequency: 2472.000 MHz (Ch
>> 13) on phy0
>> [  332.729896] brcmfmac: brcmf_set_channel: set chanspec 0xd022 fail,
>> reason -52
>> [  332.840008] brcmfmac: brcmf_set_channel: set chanspec 0xd026 fail,
>> reason -52
>> [  332.949910] brcmfmac: brcmf_set_channel: set chanspec 0xd02a fail,
>> reason -52
>> [  333.059802] brcmfmac: brcmf_set_channel: set chanspec 0xd02e fail,
>> reason -52
>> [  334.819896] brcmfmac: brcmf_set_channel: set chanspec 0xd090 fail,
>> reason -52
>> [  334.820318] brcmfmac: brcmf_set_channel: set chanspec 0xd095 fail,
>> reason -52
>> [  334.820719] brcmfmac: brcmf_set_channel: set chanspec 0xd099 fail,
>> reason -52
>> [  334.821120] brcmfmac: brcmf_set_channel: set chanspec 0xd09d fail,
>> reason -52
>> [  334.821521] brcmfmac: brcmf_set_channel: set chanspec 0xd0a1 fail,
>> reason -52
>> [  334.821922] brcmfmac: brcmf_set_channel: set chanspec 0xd0a5 fail,
>> reason -52
>
> Do you know if this happens before or after the reconnect has completed?
> You could enable CONN debug level in brcmfmac to determine that.
>
>> [  334.956787] cfg80211: Calling CRDA for country: DE
>
> I guess this message is a bit stale and there is no crda user-mode helper.
>
>> [  334.990709] cfg80211: Disabling freq 2484.000 MHz
>
> So 2GHz channel 14 gets disabled here probably due to country change to DE.
>
> Not learned a whole lot more from this test round except that reg.c is
> active during the reconnect so I suggest to zoom in there. Especially
> around the "restoring" message.

I wonder whether we end up in restore_custom_reg_settings() which does:

chan->flags = chan->orig_flags;

for each channel. That would re-enable those channels. Have you always seen 
this or at certain kernel update or wpa_supplicant maybe?

Regards,
Arend

>
> Regards,
> Arend
>
>> [  334.991199] cfg80211: Regulatory domain changed to country: DE
>> [  334.991212] cfg80211:  DFS Master region: ETSI
>> [  334.991218] cfg80211:   (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp), (dfs_cac_time)
>> [  334.991236] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz),
>> (N/A, 2000 mBm), (N/A)
>> [  334.991249] cfg80211:   (5150000 KHz - 5250000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [  334.991261] cfg80211:   (5250000 KHz - 5350000 KHz @ 80000 KHz,
>> 200000 KHz AUTO), (N/A, 2000 mBm), (0 s)
>> [  334.991273] cfg80211:   (5470000 KHz - 5725000 KHz @ 160000 KHz),
>> (N/A, 2698 mBm), (0 s)
>> [  334.991284] cfg80211:   (5725000 KHz - 5875000 KHz @ 80000 KHz),
>> (N/A, 1397 mBm), (N/A)
>> [  334.991296] cfg80211:   (5945000 KHz - 6425000 KHz @ 160000 KHz,
>> 480000 KHz AUTO), (N/A, 2301 mBm), (N/A)
>> [  334.991307] cfg80211:   (57000000 KHz - 66000000 KHz @ 2160000 KHz),
>> (N/A, 4000 mBm), (N/A)
>> [  397.278378] cfg80211: Verifying active interfaces after reg change


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