[PATCH v1 1/3] ufs: core: only suspend clock scaling if scale down

Bart Van Assche bvanassche at acm.org
Tue Aug 29 10:08:18 PDT 2023


On 8/23/23 02:29, peter.wang at mediatek.com wrote:
> From: Peter Wang <peter.wang at mediatek.com>
> 
> If clock scale up and suspend clock scaling, ufs will keep high
> performance/power mode but no read/write requests on going.
> It is logic wrong and have power concern.
> 
> Signed-off-by: Peter Wang <peter.wang at mediatek.com>
> ---
>   drivers/ufs/core/ufshcd.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index 129446775796..e3672e55efae 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -1458,7 +1458,7 @@ static int ufshcd_devfreq_target(struct device *dev,
>   		ktime_to_us(ktime_sub(ktime_get(), start)), ret);
>   
>   out:
> -	if (sched_clk_scaling_suspend_work)
> +	if (sched_clk_scaling_suspend_work && !scale_up)
>   		queue_work(hba->clk_scaling.workq,
>   			   &hba->clk_scaling.suspend_work);
>   

Is this perhaps the same patch as
https://lore.kernel.org/linux-scsi/20230801133458.6837-1-peter.wang@mediatek.com/ 
?

Thanks,

Bart.



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