Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Mime-Version: 1.0
Subject: RE: Re: [PATCH] scsi: ufs: Refactor ufshcd_is_intr_aggr_allowed()
Reply-To: keosung.park@samsung.com
Sender: Keoseong Park <keosung.park@samsung.com>
From:   Keoseong Park <keosung.park@samsung.com>
To:     Adrian Hunter <adrian.hunter@intel.com>,
        Keoseong Park <keosung.park@samsung.com>,
        "joe@perches.com" <joe@perches.com>,
        ALIM AKHTAR <alim.akhtar@samsung.com>,
        "avri.altman@wdc.com" <avri.altman@wdc.com>,
        "jejb@linux.ibm.com" <jejb@linux.ibm.com>,
        "martin.petersen@oracle.com" <martin.petersen@oracle.com>,
        "stanley.chu@mediatek.com" <stanley.chu@mediatek.com>,
        "cang@codeaurora.org" <cang@codeaurora.org>,
        "beanhuo@micron.com" <beanhuo@micron.com>,
        "asutoshd@codeaurora.org" <asutoshd@codeaurora.org>,
        Kiwoong Kim <kwmad.kim@samsung.com>,
        "satyat@google.com" <satyat@google.com>,
        "bvanassche@acm.org" <bvanassche@acm.org>,
        "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
In-Reply-To: <ed6d8c44-295e-aaa7-4b5f-7929c1c797d1@intel.com>
Message-ID: <37380050.31624517282371.JavaMail.epsvc@epcpadp4>
Date:   Thu, 24 Jun 2021 15:41:08 +0900
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset="utf-8"
References: <ed6d8c44-295e-aaa7-4b5f-7929c1c797d1@intel.com>
        <1891546521.01624267081897.JavaMail.epsvc@epcpadp4>
        <CGME20210621085158epcms2p46170ba48174547df00b9720dbc843110@epcms2p1>
Precedence: bulk

>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@samsung.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?

Hello Adrian,
Sorry for late reply.

The code that returns true when CONFIG_SCSI_UFS_DWC is set in the original code 
is only changed using the IS_ENABLED macro.
(Linux kernel coding style, 21) Conditional Compilation)

When CONFIG_SCSI_UFS_DWC is not defined, the code for checking quirk 
and caps has been moved to the newly added return statement below.

Thanks,
Keoseong

>
>>  		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)
>> 
>