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Date:   Wed, 16 Dec 2020 14:31:04 +0100
From:   Bean Huo <>
To:     Can Guo <>,,,,,,,,
Cc:     Alim Akhtar <>,
        Avri Altman <>,
        "James E.J. Bottomley" <>,
        "Martin K. Petersen" <>,
        Stanley Chu <>,
        Bean Huo <>,
        Bart Van Assche <>,
        Satya Tangirala <>,
        open list <>
Subject: Re: [PATCH v4 1/3] scsi: ufs: Protect some contexts from unexpected
 clock scaling

On Sun, 2020-12-13 at 08:31 -0800, Can Guo wrote:
> In contexts like suspend, shutdown and error handling, we need to
> suspend
> devfreq to make sure these contexts won't be disturbed by clock
> scaling.
> However, suspending devfreq is not enough since users can still
> trigger a
> clock scaling by manipulating the sysfs node clkscale_enable and
> devfreq
> sysfs nodes like min/max_freq and governor. Add one more flag in
> struct
> clk_scaling such that these contexts can prevent clock scaling from
> being
> invoked through above sysfs nodes.
> Signed-off-by: Can Guo <>
looks good to me.

Reviewed-by: Bean Huo <>

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