linux-kernel - Re: [PATCH v3] scsi: ufs: core: Fix data race in CPU latency PM QoS request handling

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Message-ID: <c276985b-dff1-48ea-a4b4-d9526b7dece6@acm.org>
Date: Wed, 17 Sep 2025 09:33:36 -0700
From: Bart Van Assche <bvanassche@....org>
To: Zhongqiu Han <zhongqiu.han@....qualcomm.com>, alim.akhtar@...sung.com,
 avri.altman@....com, James.Bottomley@...senPartnership.com,
 martin.petersen@...cle.com
Cc: peter.wang@...iatek.com, tanghuan@...o.com, liu.song13@....com.cn,
 quic_nguyenb@...cinc.com, viro@...iv.linux.org.uk, huobean@...il.com,
 adrian.hunter@...el.com, can.guo@....qualcomm.com, ebiggers@...nel.org,
 neil.armstrong@...aro.org, angelogioacchino.delregno@...labora.com,
 quic_narepall@...cinc.com, quic_mnaresh@...cinc.com,
 linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
 nitin.rawat@....qualcomm.com, ziqi.chen@....qualcomm.com
Subject: Re: [PATCH v3] scsi: ufs: core: Fix data race in CPU latency PM QoS
 request handling

On 9/17/25 2:41 AM, Zhongqiu Han wrote:
> This patch introduces a dedicated mutex to serialize PM QoS operations,
> preventing data races and ensuring safe access to PM QoS resources,
> including sysfs interface reads.

Reviewed-by: Bart Van Assche <bvanassche@....org>