[PATCH v2 5/6] wifi: mt76: mt7921: update the channel usage when the regd domain changed

[Deren Wu (武德仁)]

Hi Angelo,

On Tue, 2023-10-17 at 12:32 +0200, AngeloGioacchino Del Regno wrote:
> Il 30/09/23 04:25, Deren Wu ha scritto:
> > From: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>
> > 
> > The 5.9/6GHz channel license of a certain platform device has been
> > regulated in various countries. That may be difference with
> > standard
> > Liunx regulatory domain settings. In this case, when
> > .reg_notifier()
> > called for regulatory change, mt792x chipset should update the
> > channel
> > usage based on clc or dts configurations.
> > 
> > Channel would be disabled by following cases.
> > * clc report the particular UNII-x is disabled.
> > * dts enabled and the channel is not configured.
> > 
> > Signed-off-by: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>
> > Co-developed-by: Deren Wu <deren.wu at mediatek.com>
> > Signed-off-by: Deren Wu <deren.wu at mediatek.com>
> 
> Hello,
> this patch is giving a kernel panic on the MT8195 Acer Tomato
> Chromebook.
> 
Thanks for the report. We provide a patch for this case and complete
the test with mt7921/mt7922. Could you please help to check the new
patch?

https://lore.kernel.org/all/b3c45980a230f17af186d4004107ed27ee952cc9.1697547461.git.deren.wu@mediatek.com/

Thanks,
Deren

> 
> Please refer to this stacktrace:
> 
> <1>[   19.442078] Unable to handle kernel NULL pointer dereference at
> virtual 
> address 0000000000000014
> <1>[   19.457535] Mem abort info:
> <1>[   19.465329]   ESR = 0x0000000096000004
> <1>[   19.473295]   EC = 0x25: DABT (current EL), IL = 32 bits
> <1>[   19.482354]   SET = 0, FnV = 0
> <1>[   19.489143]   EA = 0, S1PTW = 0
> <1>[   19.495991]   FSC = 0x04: level 0 translation fault
> <1>[   19.504554] Data abort info:
> <1>[   19.511111]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
> <1>[   19.520269]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> <1>[   19.528988]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> <1>[   19.537960] user pgtable: 4k pages, 48-bit VAs,
> pgdp=00000001027a9000
> <1>[   19.548014] [0000000000000014] pgd=0000000000000000,
> p4d=0000000000000000
> <0>[   19.558429] Internal error: Oops: 0000000096000004 [#1] PREEMPT
> SMP
> <4>[   19.568270] Modules linked in: mt7921e mt7921_common
> mt792x_lib 
> mt76_connac_lib mt76 mac80211 btusb btintel cfg80211 btmtk
> snd_sof_ipc_msg_injector 
> btrtl snd_sof_ipc_flood_test btbcm bluetooth snd_sof_mt8195 uvcvideo 
> mtk_adsp_common snd_sof_xtensa_dsp uvc snd_sof_of snd_sof
> videobuf2_vmalloc 
> ecdh_generic ecc snd_sof_utils cros_ec_lid_angle cros_ec_sensors
> crct10dif_ce 
> cros_ec_sensors_core cros_usbpd_logger crypto_user fuse ip_tables
> ipv6
> <4>[   19.614237] CPU: 1 PID: 105 Comm: kworker/1:1 Not tainted 
> 6.6.0-rc6-next-20231017+ #324
> <4>[   19.625957] Hardware name: Acer Tomato (rev2) board (DT)
> <4>[   19.634970] Workqueue: events mt7921_init_work [mt7921_common]
> <4>[   19.644522] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT
> -SSBS BTYPE=--)
> <4>[   19.655182] pc : mt7921_regd_notifier+0x180/0x290
> [mt7921_common]
> <4>[   19.664983] lr : mt7921_regd_notifier+0xd4/0x290
> [mt7921_common]
> <4>[   19.674679] sp : ffff800080acba80
> <4>[   19.681649] x29: ffff800080acba80 x28: 0000000000000000 x27:
> ffff4faf16032148
> <4>[   19.692483] x26: 0000000000000000 x25: 0000000000000000 x24:
> ffff4faf1603afa0
> <4>[   19.703294] x23: 00000000ffffe926 x22: ffff4faf16031fa0 x21:
> 0000000000000023
> <4>[   19.714108] x20: 000000000000001c x19: ffff4faf16ba6f40 x18:
> 00000000ff1d6000
> <4>[   19.724928] x17: 0000000000000000 x16: ffffac6b891c2750 x15:
> ffff800081051000
> <4>[   19.735722] x14: 0000000000000180 x13: 0000000000000000 x12:
> 0000000000000002
> <4>[   19.746478] x11: 0000000000000002 x10: ffff4faf01c21780 x9 :
> ffffac6b891c282c
> <4>[   19.757214] x8 : 00000000006c0000 x7 : ffffac6b6b020cf0 x6 :
> ffffac6b6b020ce8
> <4>[   19.767945] x5 : ffffac6b6b020d00 x4 : ffffac6b6b020cf8 x3 :
> ffff4faf16035fa0
> <4>[   19.778648] x2 : 0000000000000000 x1 : 000000000000001c x0 :
> 0000000000000031
> <4>[   19.789366] Call trace:
> <4>[   19.795381]  mt7921_regd_notifier+0x180/0x290 [mt7921_common]
> <4>[   19.804675]  wiphy_update_regulatory+0x2bc/0xa08 [cfg80211]
> <4>[   19.813864]  wiphy_regulatory_register+0x4c/0x88 [cfg80211]
> <4>[   19.823029]  wiphy_register+0x75c/0x8d0 [cfg80211]
> <4>[   19.831446]  ieee80211_register_hw+0x70c/0xc10 [mac80211]
> <4>[   19.840479]  mt76_register_device+0x168/0x2e8 [mt76]
> <4>[   19.849008]  mt7921_init_work+0xdc/0x250 [mt7921_common]
> <4>[   19.857817]  process_one_work+0x148/0x3c0
> <4>[   19.865292]  worker_thread+0x32c/0x450
> <4>[   19.872489]  kthread+0x11c/0x128
> <4>[   19.879173]  ret_from_fork+0x10/0x20
> <0>[   19.886153] Code: f0000041 9100a021 94000aef aa0003f9
> (b9401780)
> <4>[   19.895634] ---[ end trace 0000000000000000 ]---
> 
> Regards,
> Angelo
>