WCN7850 problem on Linux kernel 6.15

Baochen Qiang quic_bqiang at quicinc.com
Wed May 28 22:27:21 PDT 2025 


On 5/29/2025 8:30 AM, Doug Brewer wrote:
> On Wed, May 28, 2025 at 10:36 PM Baochen Qiang <quic_bqiang at quicinc.com> wrote:
>>
>>
>>
>> On 5/28/2025 8:55 PM, Doug Brewer wrote:
>>> On Wed, May 28, 2025 at 4:02 PM Baochen Qiang <quic_bqiang at quicinc.com> wrote:
>>>>
>>>>
>>>>
>>>> On 5/28/2025 3:29 PM, Doug Brewer wrote:
>>>>> On Wed, May 28, 2025 at 1:16 PM Baochen Qiang <quic_bqiang at quicinc.com> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 5/27/2025 11:00 AM, Doug Brewer wrote:
>>>>>>> On Tue, May 27, 2025 at 9:10 AM Doug Brewer wrote:
>>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> After upgrading to kernel 6.15, my ath12k failed to start:ath12k_pci
>>>>>>
>>>>>> Is this mainline kernel or stable kernel?
>>>>>
>>>>> It's stable kernel:
>>>>> https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.15.tar.xz
>>>>>
>>>>>>>> 0000:03:00.0: BAR 0 [mem 0xdf000000-0xdf1fffff 64bit]: assigned
>>>>>>>> ath12k_pci 0000:03:00.0: enabling device (0000 -> 0002)
>>>>>>>> ath12k_pci 0000:03:00.0: MSI vectors: 16
>>>>>>>> ath12k_pci 0000:03:00.0: Hardware name: wcn7850 hw2.0
>>>>>>>> NET: Registered PF_QIPCRTR protocol family
>>>>>>>> pcieport 0000:00:1d.0: AER: Multiple Uncorrectable (Non-Fatal) error message rec
>>>>>>>> eived from 0000:00:1d.0
>>>>>>>> pcieport 0000:00:1d.0: PCIe Bus Error: severity=Uncorrectable (Non-Fatal), type=
>>>>>>>> Transaction Layer, (Completer ID)
>>>>>>>> pcieport 0000:00:1d.0:   device [8086:9d18] error status/mask=00008000/00010000
>>>>>>>> pcieport 0000:00:1d.0:    [15] CmpltAbrt              (First)
>>>>>>>> pcieport 0000:00:1d.0: AER:   TLP Header: 0x00000000 0x00000000 0x00000000 0x000
>>>>>>>> 00000
>>>>>>
>>>>>> Strange there is AER error? Is 0000:00:1d.0 upstream port of WLAN target? I guess not
>>>>>> because 8086:9d18 seems like an Intel device?
>>>>>
>>>>> Appending ‘pcie_aspm=off’ to the kernel command line will eliminate that error.
>>>>>
>>>>>> Can you share lspci log:
>>>>>>
>>>>>> lspci -tv
>>>>>
>>>>> -[0000:00]-+-00.0  Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Pro
>>>>> cessor Host Bridge/DRAM Registers
>>>>>           +-02.0  Intel Corporation Skylake GT2 [HD Graphics 520]
>>>>>           +-08.0  Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8
>>>>> th Gen Core Processor Gaussian Mixture Model
>>>>>           +-14.0  Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller
>>>>>           +-16.0  Intel Corporation Sunrise Point-LP CSME HECI #1
>>>>>           +-17.0  Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode]
>>>>>           +-1c.0-[01]--
>>>>>           +-1c.5-[02]----00.0  Intel Corporation I210 Gigabit Network Connection
>>>>>           +-1d.0-[03]----00.0  Qualcomm Technologies, Inc WCN785x Wi-Fi 7(802.1
>>>>> 1be) 320MHz 2x2 [FastConnect 7800]
>>>>>           +-1e.0  Intel Corporation Sunrise Point-LP Serial IO UART Controller
>>>>> #0
>>>>>           +-1e.6  Intel Corporation Sunrise Point-LP Secure Digital IO
>>>>> Controller
>>>>>           +-1f.0  Intel Corporation Sunrise Point-LP LPC Controller
>>>>>           +-1f.2  Intel Corporation Sunrise Point-LP PMC
>>>>>           +-1f.3  Intel Corporation Sunrise Point-LP HD Audio
>>>>>           +-1f.4  Intel Corporation Sunrise Point-LP SMBus
>>>>>           \-1f.6  Intel Corporation Ethernet Connection I219-LM
>>>>>
>>>>>
>>>>>>>> mhi mhi0: Requested to power ON
>>>>>>>> mhi mhi0: Power on setup success
>>>>>>>> mhi mhi0: Wait for device to enter SBL or Mission mode
>>>>>>>> ath12k_pci 0000:03:00.0: AER: can't recover (no error_detected callback)
>>>>>>>> pcieport 0000:00:1d.0: AER: device recovery failed
>>>>>>>> ath12k_pci 0000:03:00.0: qmi dma allocation failed (7012352 B type 1),
>>>>>>>> will try later with small size
>>>>>>>> ath12k_pci 0000:03:00.0: chip_id 0x2 chip_family 0x4 board_id 0xff
>>>>>>>> soc_id 0x40170200
>>>>>>>> ath12k_pci 0000:03:00.0: fw_version 0x1108811c fw_build_timestamp 2025-05-17 00:
>>>>>>>> 21 fw_build_id QC_IMAGE_VERSION_STRING=WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V
>>>>>>>> 2.0_SILICONZ-3
>>>>>>>> ath12k_pci 0000:03:00.0: ignore reset dev flags 0x200
>>>>>>>> ath12k_pci 0000:03:00.0: failed to receive wmi unified ready event: -110
>>>>>>>> ath12k_pci 0000:03:00.0: failed to start core: -110
>>>>>>>> failed to send QMI message
>>>>>>>> ath12k_pci 0000:03:00.0: qmi failed to send mode request, mode: 4, err = -5
>>>>>>>> ath12k_pci 0000:03:00.0: qmi failed to send wlan mode off
>>>>>>>
>>>>>>> Tested on same machine with kernel 6.14.8, ath12k works:
>>>>>>
>>>>>> This seem like stable kernel, can you try latest mainline kernel?
>>>>>>
>>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>>>>>
>>>>>> or latest ath tree?
>>>>>>
>>>>>> https://web.git.kernel.org/pub/scm/linux/kernel/git/ath/ath.git/
>>>>>
>>>>> OK, will try mailine kernel, thanks.
>>>>
>>>> Please also try latest ath tree if issue still seen with mainline kernel.
>>>
>>> Both mainline and stable kernels have the same error.
>>> Switched to ath.git, my ath12k works.
>>>
>>> Seems to me that both mainline and stable kernels have fallout.
>>
>> Great. So seems some fixes/update not landing in mainline/stable yet.
> 
> It's not good that ath12k is broken on the stable kernel 6.15.
> Do you know which fixes haven't landed yet?
> I'd be happy to help test them, thanks.

Pease pick below series and try

https://lore.kernel.org/linux-wireless/20250409-ath12k-wcn7850-mlo-support-v2-0-3801132ca2c3@quicinc.com/


> 
>>>>>>> ath12k_pci 0000:03:00.0: BAR 0 [mem 0xdf000000-0xdf1fffff 64bit]: assigned
>>>>>>> ath12k_pci 0000:03:00.0: enabling device (0000 -> 0002)
>>>>>>> ath12k_pci 0000:03:00.0: MSI vectors: 16
>>>>>>> ath12k_pci 0000:03:00.0: Hardware name: wcn7850 hw2.0
>>>>>>> pcieport 0000:00:1d.0: AER: Multiple Uncorrectable (Non-Fatal) error message rec
>>>>>>> eived from 0000:00:1d.0
>>>>>>> pcieport 0000:00:1d.0: PCIe Bus Error: severity=Uncorrectable (Non-Fatal), type=
>>>>>>> Transaction Layer, (Completer ID)
>>>>>>> pcieport 0000:00:1d.0:   device [8086:9d18] error status/mask=00008000/00010000
>>>>>>> pcieport 0000:00:1d.0:    [15] CmpltAbrt              (First)
>>>>>>> pcieport 0000:00:1d.0: AER:   TLP Header: 0x00000000 0x00000000
>>>>>>> 0x00000000 0x00000000
>>>>>>> mhi mhi0: Requested to power ON
>>>>>>> mhi mhi0: Power on setup success
>>>>>>> mhi mhi0: Wait for device to enter SBL or Mission mode
>>>>>>> ath12k_pci 0000:03:00.0: AER: can't recover (no error_detected callback)
>>>>>>> pcieport 0000:00:1d.0: AER: device recovery failed
>>>>>>> ath12k_pci 0000:03:00.0: qmi dma allocation failed (7012352 B type 1),
>>>>>>> will try later with small size
>>>>>>> ath12k_pci 0000:03:00.0: chip_id 0x2 chip_family 0x4 board_id 0xff
>>>>>>> soc_id 0x40170200
>>>>>>> ath12k_pci 0000:03:00.0: fw_version 0x1108811c fw_build_timestamp 2025-05-17 00:
>>>>>>> 21 fw_build_id QC_IMAGE_VERSION_STRING=WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V
>>>>>>> 2.0_SILICONZ-3

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