linux-kernel - Re: [PATCH 2/2] scsi: ufs: Use the resource-managed function to add devfreq device

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Message-ID: <5742aac5e4d5e4c550a7c073047e2426@codeaurora.org>
Date:   Wed, 26 Oct 2016 10:23:03 -0700
From:   Subhash Jadavani <subhashj@...eaurora.org>
To:     Chanwoo Choi <cw00.choi@...sung.com>
Cc:     myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
        rjw@...ysocki.net, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, cpgs@...sung.com,
        Vinayak Holikatti <vinholikatti@...il.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-scsi-owner@...r.kernel.org
Subject: Re: [PATCH 2/2] scsi: ufs: Use the resource-managed function to add
 devfreq device

On 2016-10-26 00:38, Chanwoo Choi wrote:
> This patch uses the resource-managed to add the devfreq device.
> This function will make it easy to handle the devfreq device.
> 
> - struct devfreq *devm_devfreq_add_device(struct device *dev,
> 				  struct devfreq_dev_profile *profile,
> 				  const char *governor_name,
> 				  void *data);
> Cc: Vinayak Holikatti <vinholikatti@...il.com>
> Cc: James E.J. Bottomley <jejb@...ux.vnet.ibm.com>
> Cc: Martin K. Petersen <martin.petersen@...cle.com>
> Cc: linux-scsi@...r.kernel.org
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> ---
>  drivers/scsi/ufs/ufshcd.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index f08d41a2d70b..e639071fd3a1 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -6198,8 +6198,6 @@ void ufshcd_remove(struct ufs_hba *hba)
>  	scsi_host_put(hba->host);
> 
>  	ufshcd_exit_clk_gating(hba);
> -	if (ufshcd_is_clkscaling_enabled(hba))
> -		devfreq_remove_device(hba->devfreq);
>  	ufshcd_hba_exit(hba);
>  }
>  EXPORT_SYMBOL_GPL(ufshcd_remove);
> @@ -6495,7 +6493,7 @@ int ufshcd_init(struct ufs_hba *hba, void
> __iomem *mmio_base, unsigned int irq)
>  	}
> 
>  	if (ufshcd_is_clkscaling_enabled(hba)) {
> -		hba->devfreq = devfreq_add_device(dev, &ufs_devfreq_profile,
> +		hba->devfreq = devm_devfreq_add_device(dev, &ufs_devfreq_profile,
>  						   "simple_ondemand", NULL);
>  		if (IS_ERR(hba->devfreq)) {
>  			dev_err(hba->dev, "Unable to register with devfreq %ld\n",

This change looks good to me but this will have merge conflicts if this 
gets in after my patch series "	[PATCH v1 00/11] scsi: ufs: bug fixes 
patch series #1" (due to "[PATCH v1 06/11] scsi: ufs: suspend clock 
scaling for failed runtime_resume"). so if you can, please pull in my 
patch series and rebase your change on top of it and send it out again.

Thanks,
Subhash

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