linux-kernel - Re: [PATCH v4 02/10] scsi: ufs: Add flags pm_op_in_progress and is_sys

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Date:   Thu, 24 Jun 2021 10:07:45 +0800
From:   Can Guo <cang@...eaurora.org>
To:     Bart Van Assche <bvanassche@....org>
Cc:     asutoshd@...eaurora.org, nguyenb@...eaurora.org,
        hongwus@...eaurora.org, ziqichen@...eaurora.org,
        linux-scsi@...r.kernel.org, kernel-team@...roid.com,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Bean Huo <beanhuo@...ron.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Satya Tangirala <satyat@...gle.com>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 02/10] scsi: ufs: Add flags pm_op_in_progress and
 is_sys_suspended

On 2021-06-24 04:59, Bart Van Assche wrote:
> On 6/23/21 12:35 AM, Can Guo wrote:
>> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
>> index 93aeeb3..1e7fe73 100644
>> --- a/drivers/scsi/ufs/ufshcd.h
>> +++ b/drivers/scsi/ufs/ufshcd.h
>> @@ -754,6 +754,8 @@ struct ufs_hba {
>>  	struct device_attribute spm_lvl_attr;
>>  	/* A flag to tell whether __ufshcd_wl_suspend/resume() is in 
>> progress */
>>  	bool wlu_pm_op_in_progress;
>> +	/* A flag to tell whether ufshcd_suspend/resume() is in progress */
>> +	bool pm_op_in_progress;
>> 
>>  	/* Auto-Hibernate Idle Timer register value */
>>  	u32 ahit;
>> @@ -841,6 +843,8 @@ struct ufs_hba {
>>  	struct ufs_clk_scaling clk_scaling;
>>  	/* A flag to tell whether the UFS device W-LU is system suspended */
>>  	bool is_wlu_sys_suspended;
>> +	/* A flag to tell whether hba is system suspended */
>> +	bool is_sys_suspended;
>> 
>>  	enum bkops_status urgent_bkops_lvl;
>>  	bool is_urgent_bkops_lvl_checked;
> 
> It is not yet clear to me whether we really need these new member
> variables. If these are retained, please rename pm_op_in_progress into
> platform_pm_op_in_progress and is_sys_suspended into
> platform_is_sys_suspended.

Hi Bart,

These flags are informative when we debug some UFS issues and they
are used by later changes. Sure, I will modify the namings.

Thanks,

Can Guo.

> 
> Thanks,
> 
> Bart.