Re: [PATCH v2] wifi: ath11k: apply existing PM quirk to ThinkPad P14s Gen 5 AMD

[Baochen Qiang]

On 4/1/2026 11:48 AM, Kyle Farnung wrote:
> On Tue, Mar 31, 2026 at 7:08 PM Baochen Qiang
> <baochen.qiang@xxxxxxxxxxxxxxxx> wrote:
>>
>>
>>
>> On 3/31/2026 2:32 PM, Kyle Farnung via B4 Relay wrote:
>>> From: Kyle Farnung <kfarnung@xxxxxxxxx>
>>>
>>> Some ThinkPad P14s Gen 5 AMD systems experience suspend/resume
>>> reliability issues similar to those reported in [1]. These platforms
>>
>> how similar it is? can you describe the issue in details?
> 
> The issue is that intermittently after suspend my WiFi adapter connects
> successfully for a few minutes and then drops. It will then keep trying to
> reconnect in a loop but never succeed. A reboot will fix it, but eventually
> I found that reloading the module also resolves the issue
> (modprobe -r ath11k_pci && modprobe ath11k_pci). Based on some searching, I
> did try adding "ath11k_pci.disable_idle_ps=1" to my kernel arguments. At
> first it looked like maybe it worked, but then I hit the same problem
> again. At that point I decided to try building a custom module with the
> ATH11K_PM_WOW override and so far I'm two days and 10 suspends in without
> issue.
> 
> Looking through kernel logs, the issue appears to have started with kernel
> version 6.17.4. It looks like my Fedora install jumped from 6.16.10 to
> 6.17.4 on October 22, 2025 and I started seeing the issue two days later.
> 
> Here are the logs from the most recent occurrence (filtered for brevity):
> 
> Mar 29 15:26:24 kjfp14sg5 kernel: PM: suspend exit
> Mar 29 15:26:24 kjfp14sg5 kernel: ath11k_pci 0000:02:00.0: chip_id
> 0x12 chip_family 0xb board_id 0xff soc_id 0x400c1211
> Mar 29 15:26:24 kjfp14sg5 kernel: ath11k_pci 0000:02:00.0: fw_version
> 0x11088c35 fw_build_timestamp 2024-04-17 08:34 fw_build_id
> WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41
> Mar 29 15:26:30 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=COUNTRY alpha2=US
> Mar 29 15:26:30 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=COUNTRY alpha2=US
> Mar 29 15:26:30 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=COUNTRY alpha2=US
> Mar 29 15:26:35 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-CONNECTED - Connection to 68:d7:9a:2a:94:f8 completed [id=0
> id_str=]
> Mar 29 15:26:49 kjfp14sg5 wpa_supplicant[2373]: wlp2s0: CTRL-EVENT-BEACON-LOSS

this is the reason to your disconnection

> Mar 29 15:26:55 kjfp14sg5 kernel: ath11k_pci 0000:02:00.0: failed to
> flush transmit queue, data pkts pending 9
> Mar 29 15:26:55 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-DISCONNECTED bssid=68:d7:9a:2a:94:f8 reason=4
> locally_generated=1
> Mar 29 15:27:00 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-DISCONNECTED bssid=80:2a:a8:98:26:3e reason=6
> Mar 29 15:27:05 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-DISCONNECTED bssid=74:ac:b9:df:54:36 reason=6
> Mar 29 15:27:09 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-DISCONNECTED bssid=68:d7:9a:2a:94:f8 reason=2
> Mar 29 15:27:09 kjfp14sg5 wpa_supplicant[2373]: wlp2s0:
> CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="Batman" auth_failures=1
> duration=10 reason=CONN_FAILED

and the bssid is disabled so association to this AP won't happen in a period.

Anyway, although it works, using the PM quirk seems not the right fix. As you mentioned it
seems like a regression starting to show in 6.17.4, can you do regression test to locate
the issue commit?

> 
>>
>>> were not previously included in the ath11k PM quirk table.
>>>
>>> Add DMI matches for product IDs 21ME and 21MF to apply the existing
>>> ATH11K_PM_WOW override, improving suspend/resume behavior on these
>>> systems.
>>>
>>> Tested on a ThinkPad P14s Gen 5 AMD (21ME) running 6.19.9.
>>>
>>> [1] https://bugzilla.kernel.org/show_bug.cgi?id=219196
>>> [2] https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-p-series-laptops/thinkpad-p14s-gen-5-type-21me-21mf/
>>>
>>> Fixes: ce8669a27016 ("wifi: ath11k: determine PM policy based on machine model")
>>> Cc: stable@xxxxxxxxxxxxxxx
>>> Signed-off-by: Kyle Farnung <kfarnung@xxxxxxxxx>
>>> ---
>>> Changes in v2:
>>> - Fix missing mailing list recipients (linux-wireless, ath11k, linux-kernel)
>>> - Link to v1: https://lore.kernel.org/r/20260330-p14s-pm-quirk-v1-1-cf2fa39cc2d5@xxxxxxxxx
>>> ---
>>>  drivers/net/wireless/ath/ath11k/core.c | 14 ++++++++++++++
>>>  1 file changed, 14 insertions(+)
>>>
>>> diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
>>> index 3f6f4db5b7ee1aba79fd7526e5d59d068e0f4a2e..21d366224e75904feeae6cb9c93d9ef692d127fe 100644
>>> --- a/drivers/net/wireless/ath/ath11k/core.c
>>> +++ b/drivers/net/wireless/ath/ath11k/core.c
>>> @@ -1041,6 +1041,20 @@ static const struct dmi_system_id ath11k_pm_quirk_table[] = {
>>>                       DMI_MATCH(DMI_PRODUCT_NAME, "21D5"),
>>>               },
>>>       },
>>> +     {
>>> +             .driver_data = (void *)ATH11K_PM_WOW,
>>> +             .matches = { /* P14s G5 AMD #1 */
>>> +                     DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
>>> +                     DMI_MATCH(DMI_PRODUCT_NAME, "21ME"),
>>> +             },
>>> +     },
>>> +     {
>>> +             .driver_data = (void *)ATH11K_PM_WOW,
>>> +             .matches = { /* P14s G5 AMD #2 */
>>> +                     DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
>>> +                     DMI_MATCH(DMI_PRODUCT_NAME, "21MF"),
>>> +             },
>>> +     },
>>>       {}
>>>  };
>>>
>>>
>>> ---
>>> base-commit: dbd94b9831bc52a1efb7ff3de841ffc3457428ce
>>> change-id: 20260330-p14s-pm-quirk-0a51ba19235f
>>>
>>> Best regards,
>>