linux-kernel - Re: [PATCH] scsi: ufs: Refactor ufshcd_is_intr_aggr

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Message-ID: <ed6d8c44-295e-aaa7-4b5f-7929c1c797d1@intel.com>
Date:   Mon, 21 Jun 2021 12:29:58 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     keosung.park@...sung.com, "joe@...ches.com" <joe@...ches.com>,
        ALIM AKHTAR <alim.akhtar@...sung.com>,
        "avri.altman@....com" <avri.altman@....com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        "satyat@...gle.com" <satyat@...gle.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: ufs: Refactor ufshcd_is_intr_aggr_allowed()

On 21/06/21 11:51 am, Keoseong Park wrote:
> Change conditional compilation to IS_ENABLED macro,
> and simplify if else statement to return statement.
> No functional change.
> 
> Signed-off-by: Keoseong Park <keosung.park@...sung.com>
> ---
>  drivers/scsi/ufs/ufshcd.h | 17 ++++++++---------
>  1 file changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index c98d540ac044..6d239a855753 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -893,16 +893,15 @@ static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba *hba)
>  
>  static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
>  {
> -/* DWC UFS Core has the Interrupt aggregation feature but is not detectable*/
> -#ifndef CONFIG_SCSI_UFS_DWC
> -	if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
> -	    !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
> +	/*
> +	 * DWC UFS Core has the Interrupt aggregation feature
> +	 * but is not detectable.
> +	 */
> +	if (IS_ENABLED(CONFIG_SCSI_UFS_DWC))

Why is this needed?  It seems like you could just set UFSHCD_CAP_INTR_AGGR
and clear UFSHCD_QUIRK_BROKEN_INTR_AGGR instead?

>  		return true;
> -	else
> -		return false;
> -#else
> -return true;
> -#endif
> +
> +	return (hba->caps & UFSHCD_CAP_INTR_AGGR) &&
> +		!(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR);
>  }
>  
>  static inline bool ufshcd_can_aggressive_pc(struct ufs_hba *hba)
>