linux-kernel - Re: [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress

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Message-ID: <174889162398.672400.4727862624188636298.b4-ty@oracle.com>
Date: Mon,  2 Jun 2025 22:35:48 -0400
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: quic_cang@...cinc.com, bvanassche@....org, mani@...nel.org,
        beanhuo@...ron.com, avri.altman@....com, junwoo80.lee@...sung.com,
        quic_nguyenb@...cinc.com, quic_nitirawa@...cinc.com,
        quic_rampraka@...cinc.com, neil.armstrong@...aro.org,
        luca.weiss@...rphone.com, konrad.dybcio@....qualcomm.com,
        peter.wang@...iatek.com, Ziqi Chen <quic_ziqichen@...cinc.com>
Cc: "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress

On Thu, 22 May 2025 16:12:28 +0800, Ziqi Chen wrote:

> When preparing for UFS clock scaling, the UFS driver will quiesce all sdevs
> queues in the UFS SCSI host tagset list and then unquiesce them when UFS
> clock scaling unpreparing. If the UFS SCSI host async scan is in progress
> at this time, some LUs may be added to the tagset list between UFS clkscale
> prepare and unprepare. This can cause two issues:
> 
> 1. During clock scaling, there may be IO requests issued through new added
> queues that have not been quiesced, leading to task abort issue.
> 
> [...]

Applied to 6.16/scsi-queue, thanks!

[1/1] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress
      https://git.kernel.org/mkp/scsi/c/e97633492f5a

-- 
Martin K. Petersen	Oracle Linux Engineering