linux-kernel - Re: [PATCH] PCI: pciehp: Add Qualcomm quirk for Command Completed erratum

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Message-ID: <Y+qmmY+At4eFg1Dq@rocinante>
Date:   Tue, 14 Feb 2023 06:07:37 +0900
From:   Krzysztof Wilczyński <kw@...ux.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        steev@...i.org
Subject: Re: [PATCH] PCI: pciehp: Add Qualcomm quirk for Command Completed
 erratum

Hello,

> The Qualcomm PCI bridge device (Device ID 0x010e) found in chipsets such as
> SC8280XP used in Lenovo Thinkpad X13s, does not set the Command Completed
> bit unless writes to the Slot Command register change "Control" bits.
> 
> This results in timeouts like below during boot and resume from suspend:
> 
>     pcieport 0002:00:00.0: pciehp: Timeout on hotplug command 0x03c0 (issued 2020 msec ago)
>     ...
>     pcieport 0002:00:00.0: pciehp: Timeout on hotplug command 0x13f1 (issued 107724 msec ago)
> 
> Add the device to the Command Completed quirk to mark commands "completed"
> immediately unless they change the "Control" bits.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Applied to pci/hotplug, thank you!

[1/1] PCI: pciehp: Add Qualcomm quirk for Command Completed erratum
      https://git.kernel.org/pci/pci/c/dc4e71ddbe8e

	Krzysztof