WCN7850 problem on Linux kernel 6.15

Baochen Qiang quic_bqiang at quicinc.com
Wed May 28 07:36:05 PDT 2025 


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.


> 
>>>>> 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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