linux-kernel - Re: [PATCH v2] PCI: Add quirk to disable ASPM L1 for Sandisk SN740 NVMe SSDs

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Message-ID: <a678cee9-930d-4718-8341-f9cb9b01f96d@oss.qualcomm.com>
Date: Thu, 27 Nov 2025 19:40:05 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Manivannan Sadhasivam <mani@...nel.org>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>,
        bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Alexey Bogoslavsky <Alexey.Bogoslavsky@...disk.com>,
        Jeffrey Lien <Jeff.Lien@...disk.com>,
        Avinash M N <Avinash.M.N@...disk.com>
Subject: Re: [PATCH v2] PCI: Add quirk to disable ASPM L1 for Sandisk SN740
 NVMe SSDs

On 11/25/25 6:21 AM, Manivannan Sadhasivam wrote:
> On Mon, Nov 24, 2025 at 05:53:07PM -0600, Bjorn Helgaas wrote:
>> [+cc Alexey, Jeffrey, Avinash]
>>
>> On Thu, Nov 20, 2025 at 09:42:53PM +0530, Manivannan Sadhasivam wrote:
>>> The Sandisk SN740 NVMe SSDs cause below AER errors on the upstream Root
>>> Port of PCIe controller in Microsoft Surface Laptop 7, when ASPM L1 is
>>> enabled:
>>>
>>>   pcieport 0006:00:00.0: AER: Correctable error message received from 0006:01:00.0
>>>   nvme 0006:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Receiver ID)
>>>   nvme 0006:01:00.0:   device [15b7:5015] error status/mask=00000001/0000e000
>>>   nvme 0006:01:00.0:    [ 0] RxErr
>>
>> Do we have any information about whether this error happens with the
>> SN740 on platforms other than the Surface Laptop 7?  Or whether it
>> happens on the Surface with other endpoints?

[...]

> -/*
> - * Sandisk SN740 NVMe SSDs cause AER timeout errors on the upstream PCIe Root
> - * Port when ASPM L1 is enabled.
> - */
>  DECLARE_PCI_FIXUP_HEADER(0x15b7, 0x5015, quirk_disable_aspm_l1);
>  
>  /*
> 
> This check is similar to the DMI checks we have currently non-DT platforms.
> Infact, we have also use the DMI checks on this laptop as it comes with SMBIOS.
> 
> Note: I'm not sure if Konrad's lapto is based on "microsoft,romulus13" or
> "microsoft,romulus15".

15, but they're otherwise identical hardware. Please quirk off both if you
go this route.

Konrad