rtw88: rtw8822cu: Kernel warning in cfg80211: disconnect_work at net/wireless/core.h:231 on CPU 0

Hi,

I have an issue with my 8822cu based usb device on >= 6.6 Linux with AP mode. Using latest changes AP-mode seems to work fairly good. But when enabling/disabling it I seems to always get below. It sometimes happens without using AP-mode also, when for example disconnection happens due to bad connection. Any ideas what might be causing this? Please also let me know if you want additional debugging logs etc.

BR Petter

```

[ 1429.886683] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:231 disconnect_work+0xb8/0x144 [cfg80211]
[ 1429.898367] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1429.913362] CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.6.51-00141-ga1649b6f8ed6 #7
[ 1429.921228] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1429.927082] Workqueue: events disconnect_work [cfg80211]
[ 1429.933556]  unwind_backtrace from show_stack+0x10/0x14
[ 1429.938833]  show_stack from dump_stack_lvl+0x58/0x70
[ 1429.943922]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1429.948759]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1429.953939]  warn_slowpath_fmt from disconnect_work+0xb8/0x144 [cfg80211]
[ 1429.961935]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1429.969851]  process_one_work from worker_thread+0x1b0/0x474
[ 1429.975549]  worker_thread from kthread+0x10c/0x12c
[ 1429.980461]  kthread from ret_from_fork+0x14/0x24
[ 1429.985194] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1429.990268] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1429.998466] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.006662] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.014300] irq event stamp: 1984773
[ 1430.017924] hardirqs last  enabled at (1984781): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.026190] hardirqs last disabled at (1984796): [<c019e8cc>] console_unlock+0x120/0x164
[ 1430.034412] softirqs last  enabled at (1984794): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1430.042695] softirqs last disabled at (1984789): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1430.050941] ---[ end trace 0000000000000000 ]---
[ 1429.881452] ------------[ cut here ]------------
[ 1429.886683] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:231 disconnect_work+0xb8/0x144 [cfg80211]
[ 1429.898367] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1429.913362] CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.6.51-00141-ga1649b6f8ed6 #7
[ 1429.921228] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1429.927082] Workqueue: events disconnect_work [cfg80211]
[ 1429.933556]  unwind_backtrace from show_stack+0x10/0x14
[ 1429.938833]  show_stack from dump_stack_lvl+0x58/0x70
[ 1429.943922]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1429.948759]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1429.953939]  warn_slowpath_fmt from disconnect_work+0xb8/0x144 [cfg80211]
[ 1429.961935]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1429.969851]  process_one_work from worker_thread+0x1b0/0x474
[ 1429.975549]  worker_thread from kthread+0x10c/0x12c
[ 1429.980461]  kthread from ret_from_fork+0x14/0x24
[ 1429.985194] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1429.990268] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1429.998466] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.006662] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.014300] irq event stamp: 1984773
[ 1430.017924] hardirqs last  enabled at (1984781): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.026190] hardirqs last disabled at (1984796): [<c019e8cc>] console_unlock+0x120/0x164
[ 1430.034412] softirqs last  enabled at (1984794): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1430.042695] softirqs last disabled at (1984789): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1430.050941] ---[ end trace 0000000000000000 ]---
[ 1430.305675] ------------[ cut here ]------------
[ 1430.310778] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:246 cfg80211_beaconing_iface_active+0x124/0x144 [cfg80211]
[ 1430.322835] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1430.338134] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W       
   6.6.51-00141-ga1649b6f8ed6 #7
[ 1430.347480] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1430.353333] Workqueue: events disconnect_work [cfg80211]
[ 1430.359806]  unwind_backtrace from show_stack+0x10/0x14
[ 1430.365085]  show_stack from dump_stack_lvl+0x58/0x70
[ 1430.370173]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.375009]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.380190]  warn_slowpath_fmt from cfg80211_beaconing_iface_active+0x124/0x144 [cfg80211]
[ 1430.389659]  cfg80211_beaconing_iface_active [cfg80211] from disconnect_work+0x100/0x144 [cfg80211]
[ 1430.400855]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1430.408749]  process_one_work from worker_thread+0x1b0/0x474
[ 1430.414448]  worker_thread from kthread+0x10c/0x12c
[ 1430.419361]  kthread from ret_from_fork+0x14/0x24
[ 1430.424099] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1430.429173] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1430.437373] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.445571] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.452992] irq event stamp: 1985081
[ 1430.456613] hardirqs last  enabled at (1985089): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.464878] hardirqs last disabled at (1985110): [<c019e8cc>] console_unlock+0x120/0x164
[ 1430.473098] softirqs last  enabled at (1985108): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1430.481324] softirqs last disabled at (1985097): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1430.489554] ---[ end trace 0000000000000000 ]---
[ 1430.305675] ------------[ cut here ]------------
[ 1430.310778] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:246 cfg80211_beaconing_iface_active+0x124/0x144 [cfg80211]
[ 1430.322835] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1430.338134] CPU: 0 PID: 9 Comm: kworker/0:1 Tai[ 1430.529638] ------------[ cut here ]------------
nted: G        W          6.6.51-[ 1430.536236] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:239 disconnect_work+0xe4/0x144 [cfg80211]
00141-ga1649b6f8ed6 #7
[ 1430.34[ 1430.548209] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
7480] Hardware name: Freescale i.[ 1430.565496] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.6.51-00141-ga1649b6f8ed6 #7
[ 1430.577478] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1430.583331] Workqueue: events disconnect_work [cfg80211]
[ 1430.589790]  unwind_backtrace from show_stack+0x10/0x14
[ 1430.595069]  show_stack from dump_stack_lvl+0x58/0x70
[ 1430.600157]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.604994]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.610177]  warn_slowpath_fmt from disconnect_work+0xe4/0x144 [cfg80211]
[ 1430.618095]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1430.625989]  process_one_work from worker_thread+0x1b0/0x474
[ 1430.631687]  worker_thread from kthread+0x10c/0x12c
[ 1430.636602]  kthread from ret_from_fork+0x14/0x24
[ 1430.641335] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1430.646412] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1430.654610] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.662807] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
MX6 SoloX (Device Tree)
[ 1430.3[ 1430.670230] irq event stamp: 1985387
53333] Workqueue: events disconne[ 1430.676059] hardirqs last  enabled at (1985407): [<c019e8e0>] console_unlock+0x134/0x164
ct_work [cfg80211]
[ 1430.359806[ 1430.686982] hardirqs last disabled at (1985416): [<c019e8cc>] console_unlock+0x120/0x164
]  unwind_backtrace from show_sta[ 1430.697999] softirqs last  enabled at (1985404): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
ck+0x10/0x14
[ 1430.365085]  sho[ 1430.709105] softirqs last disabled at (1985395): [<c012f74c>] __irq_exit_rcu+0x154/0x194
w_stack from dump_stack_lvl+0x58/[ 1430.720445] ---[ end trace 0000000000000000 ]---
0x70
[ 1430.370173]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.375009]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.380190]  warn_slowpath_fmt from cfg80211_beaconing_iface_active+0x124/0x144 [cfg80211]
[ 1430.389659]  cfg80211_beaconing_iface_active [cfg80211] from disconnect_work+0x100/0x144 [cfg80211]
[ 1430.400855]  disconnect_work [cfg802[ 1430.757591] ------------[ cut here ]------------
11] from process_one_work+0x204/0[ 1430.763348] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:231 is_wiphy_all_set_reg_flag+0xb4/0x144 [cfg80211]
x620
[ 1430.408749]  process_one[ 1430.776198] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
_work from worker_thread+0x1b0/0x[ 1430.793594] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.6.51-00141-ga1649b6f8ed6 #7
[ 1430.805471] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1430.811324] Workqueue: events disconnect_work [cfg80211]
[ 1430.817785]  unwind_backtrace from show_stack+0x10/0x14
[ 1430.823062]  show_stack from dump_stack_lvl+0x58/0x70
[ 1430.828150]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.832986]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.838167]  warn_slowpath_fmt from is_wiphy_all_set_reg_flag+0xb4/0x144 [cfg80211]
[ 1430.846957]  is_wiphy_all_set_reg_flag [cfg80211] from regulatory_hint_disconnect+0xc/0xdc [cfg80211]
[ 1430.858313]  regulatory_hint_disconnect [cfg80211] from disconnect_work+0x130/0x144 [cfg80211]
[ 1430.869050]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1430.876943]  process_one_work from worker_thread+0x1b0/0x474
[ 1430.882642]  worker_thread from kthread+0x10c/0x12c
[ 1430.887554]  kthread from ret_from_fork+0x14/0x24
[ 1430.892290] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1430.897364] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1430.905561] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.913760] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
474
[ 1430.414448]  worker_threa[ 1430.921569] irq event stamp: 1985873
d from kthread+0x10c/0x12c
[ 143[ 1430.927055] hardirqs last  enabled at (1985911): [<c019e8e0>] console_unlock+0x134/0x164
0.419361]  kthread from ret_from_[ 1430.938018] hardirqs last disabled at (1985920): [<c019e8cc>] console_unlock+0x120/0x164
fork+0x14/0x24
[ 1430.424099] Ex[ 1430.949023] softirqs last  enabled at (1985908): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
ception stack(0xf0855fb0 to 0xf08[ 1430.959991] softirqs last disabled at (1985881): [<c012f74c>] __irq_exit_rcu+0x154/0x194
55ff8)
[ 1430.429173] 5fa0:     [ 1430.970888] ---[ end trace 0000000000000000 ]---
                                00000000 00000000 00000000 00000000
[ 1430.437373] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.445571] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.452992] irq event stamp: 1985081
[ 1430.456613] hardirqs last  enabled at (1985089): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.464878] hardirqs last disabled a[ 1431.012846] ------------[ cut here ]------------
t (1985110): [<c019e8cc>] console[ 1431.019064] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:239 is_wiphy_all_set_reg_flag+0x134/0x144 [cfg80211]
_unlock+0x120/0x164
[ 1430.47309[ 1431.031956] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
8] softirqs last  enabled at (198[ 1431.049154] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.6.51-00141-ga1649b6f8ed6 #7
[ 1431.061186] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1431.067039] Workqueue: events disconnect_work [cfg80211]
[ 1431.073498]  unwind_backtrace from show_stack+0x10/0x14
[ 1431.078776]  show_stack from dump_stack_lvl+0x58/0x70
[ 1431.083865]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1431.088701]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1431.093883]  warn_slowpath_fmt from is_wiphy_all_set_reg_flag+0x134/0x144 [cfg80211]
[ 1431.102757]  is_wiphy_all_set_reg_flag [cfg80211] from regulatory_hint_disconnect+0xc/0xdc [cfg80211]
[ 1431.114098]  regulatory_hint_disconnect [cfg80211] from disconnect_work+0x130/0x144 [cfg80211]
[ 1431.124831]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1431.132724]  process_one_work from worker_thread+0x1b0/0x474
[ 1431.138423]  worker_thread from kthread+0x10c/0x12c
[ 1431.143335]  kthread from ret_from_fork+0x14/0x24
[ 1431.148070] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1431.153144] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1431.161341] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1431.169539] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
5108): [<c012f3b4>] handle_softir[ 1431.176768] irq event stamp: 1986265
qs+0x2ac/0x49c
[ 1430.481324] so[ 1431.182674] hardirqs last  enabled at (1986275): [<c019e8e0>] console_unlock+0x134/0x164
ftirqs last disabled at (1985097)[ 1431.193819] hardirqs last disabled at (1986284): [<c019e8cc>] console_unlock+0x120/0x164
: [<c012f74c>] __irq_exit_rcu+0x1[ 1431.205066] softirqs last  enabled at (1986314): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
54/0x194
[ 1430.489554] ---[ end[ 1431.215769] softirqs last disabled at (1986293): [<c012f74c>] __irq_exit_rcu+0x154/0x194
 trace 0000000000000000 ]---
[ 1[ 1431.226678] ---[ end trace 0000000000000000 ]---
430.529638] ------------[ cut here ]------------
[ 1430.536236] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:239 disconnect_work+0xe4/0x144 [cfg80211]
[ 1430.548209] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1430.565496] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W       
   6.6.51-00141-ga1649b6f8ed6 #7
[ 1430.577478] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1430.583331] Workqueue: events disconnect_work [cfg80211]
[ 1430.589790]  unwind_backtrace from show_stack+0x10/0x14
[ 1430.595069]  show_stack from dump_stack_lvl+0x58/0x70
[ 1430.600157]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.604994]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.610177]  warn_slowpath_fmt from disconnect_work+0xe4/0x144 [cfg80211]
[ 1430.618095]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1430.625989]  process_one_work from worker_thread+0x1b0/0x474
[ 1430.631687]  worker_thread from kthread+0x10c/0x12c
[ 1430.636602]  kthread from ret_from_fork+0x14/0x24
[ 1430.641335] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1430.646412] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1430.654610] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.662807] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.670230] irq event stamp: 1985387
[ 1430.676059] hardirqs last  enabled at (1985407): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.686982] hardirqs last disabled at (1985416): [<c019e8cc>] console_unlock+0x120/0x164
[ 1430.697999] softirqs last  enabled at (1985404): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1430.709105] softirqs last disabled at (1985395): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1430.720445] ---[ end trace 0000000000000000 ]---
[ 1430.757591] ------------[ cut here ]------------
[ 1430.763348] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:231 is_wiphy_all_set_reg_flag+0xb4/0x144 [cfg80211]
[ 1430.776198] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1430.793594] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W       
   6.6.51-00141-ga1649b6f8ed6 #7
[ 1430.805471] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1430.811324] Workqueue: events disconnect_work [cfg80211]
[ 1430.817785]  unwind_backtrace from show_stack+0x10/0x14
[ 1430.823062]  show_stack from dump_stack_lvl+0x58/0x70
[ 1430.828150]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1430.832986]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1430.838167]  warn_slowpath_fmt from is_wiphy_all_set_reg_flag+0xb4/0x144 [cfg80211]
[ 1430.846957]  is_wiphy_all_set_reg_flag [cfg80211] from regulatory_hint_disconnect+0xc/0xdc [cfg80211]
[ 1430.858313]  regulatory_hint_disconnect [cfg80211] from disconnect_work+0x130/0x144 [cfg80211]
[ 1430.869050]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1430.876943]  process_one_work from worker_thread+0x1b0/0x474
[ 1430.882642]  worker_thread from kthread+0x10c/0x12c
[ 1430.887554]  kthread from ret_from_fork+0x14/0x24
[ 1430.892290] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1430.897364] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1430.905561] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1430.913760] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1430.921569] irq event stamp: 1985873
[ 1430.927055] hardirqs last  enabled at (1985911): [<c019e8e0>] console_unlock+0x134/0x164
[ 1430.938018] hardirqs last disabled at (1985920): [<c019e8cc>] console_unlock+0x120/0x164
[ 1430.949023] softirqs last  enabled at (1985908): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1430.959991] softirqs last disabled at (1985881): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1430.970888] ---[ end trace 0000000000000000 ]---
[ 1431.012846] ------------[ cut here ]------------
[ 1431.019064] WARNING: CPU: 0 PID: 9 at net/wireless/core.h:239 is_wiphy_all_set_reg_flag+0x134/0x144 [cfg80211]
[ 1431.031956] Modules linked in: rtw88_8822cu rtw88_8822c rtw88_usb rtw88_core mac80211 libarc4 cfg80211 btusb btrtl btintel btbcm btmtk imx_sdma ip_tables x_tables
[ 1431.049154] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W       
   6.6.51-00141-ga1649b6f8ed6 #7
[ 1431.061186] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 1431.067039] Workqueue: events disconnect_work [cfg80211]
[ 1431.073498]  unwind_backtrace from show_stack+0x10/0x14
[ 1431.078776]  show_stack from dump_stack_lvl+0x58/0x70
[ 1431.083865]  dump_stack_lvl from __warn+0x70/0x1c0
[ 1431.088701]  __warn from warn_slowpath_fmt+0x16c/0x294
[ 1431.093883]  warn_slowpath_fmt from is_wiphy_all_set_reg_flag+0x134/0x144 [cfg80211]
[ 1431.102757]  is_wiphy_all_set_reg_flag [cfg80211] from regulatory_hint_disconnect+0xc/0xdc [cfg80211]
[ 1431.114098]  regulatory_hint_disconnect [cfg80211] from disconnect_work+0x130/0x144 [cfg80211]
[ 1431.124831]  disconnect_work [cfg80211] from process_one_work+0x204/0x620
[ 1431.132724]  process_one_work from worker_thread+0x1b0/0x474
[ 1431.138423]  worker_thread from kthread+0x10c/0x12c
[ 1431.143335]  kthread from ret_from_fork+0x14/0x24
[ 1431.148070] Exception stack(0xf0855fb0 to 0xf0855ff8)
[ 1431.153144] 5fa0:                                     00000000 00000000 00000000 00000000
[ 1431.161341] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1431.169539] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1431.176768] irq event stamp: 1986265
[ 1431.182674] hardirqs last  enabled at (1986275): [<c019e8e0>] console_unlock+0x134/0x164
[ 1431.193819] hardirqs last disabled at (1986284): [<c019e8cc>] console_unlock+0x120/0x164
[ 1431.205066] softirqs last  enabled at (1986314): [<c012f3b4>] handle_softirqs+0x2ac/0x49c
[ 1431.215769] softirqs last disabled at (1986293): [<c012f74c>] __irq_exit_rcu+0x154/0x194
[ 1431.226678] ---[ end trace 0000000000000000 ]---

```

+ Johannes to comment wiphy_lock stuff

I think the cause is picking commit 268f84a82753
("wifi: cfg80211: check wiphy mutex is held for wdev mutex"), and cfg80211_is_all_idle() called by disconnect_work() uses wdev_lock() but not wiphy_lock().

I'm not sure if we should simply revert the picked commit 268f84a82753 or should pick more commits.

By the way, I think the latest kernel will not throw these messages. Could you try it?

Yeah seems like a stable only problem (CC them), this is with kernel version 6.6.51-00141-ga1649b6f8ed6 according to the warning.

I don't see why it was picked up in the first place, so I guess I'd say remove it. We won't want to redo the locking on a stable kernel, I'd think.

Agree, that seems unlikely.

johannes

Thanks! I tried reverting 268f84a82753, then as you guys expected the issue is gone. So will continue to run with this commit reverted. But would be good if we can decide how to handle this for stable releases (such as 6.6) and see if we can revert it their also in upcoming 6.6.53.

Sounds good. I will see if I can give it a try on later kernel also, to verify. It will require some work to get my device up and running on a later version so might take some time until I can give feedback. I was a bit fooled that I got the issue when moving from 6.6.30 to 6.6.51 + cherry-picking all latest rtw88 related changes for my LM842 (8822cu) usb dongle, but great that you guys figured it out so quickly.

I sent a patch [1] to revert it.

[1] https://lore.kernel.org/stable/[email protected]/T/#u