linux-kernel - Re: [PATCH v4 01/10] scsi: ufs: Rename flags pm_op_in_progress and is_sys

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Message-ID: <71e7d714-8cb9-1f57-9035-e43c147b5c61@acm.org>
Date:   Thu, 24 Jun 2021 10:32:34 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Can Guo <cang@...eaurora.org>, asutoshd@...eaurora.org,
        nguyenb@...eaurora.org, hongwus@...eaurora.org,
        ziqichen@...eaurora.org, linux-scsi@...r.kernel.org,
        kernel-team@...roid.com
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        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>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        Satya Tangirala <satyat@...gle.com>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 01/10] scsi: ufs: Rename flags pm_op_in_progress and
 is_sys_suspended

On 6/23/21 12:35 AM, Can Guo wrote:
> Rename pm_op_in_progress and is_sys_suspended to wlu_pm_op_in_progress and
> is_wlu_sys_suspended accordingly.

Can the pm_op_in_progress variable be removed if the UFS driver checks whether
q->rpm_status == RPM_SUSPENDING || q->rpm_status == RPM_RESUMING instead of
using pm_op_in_progress? The fewer state variables we maintain the lower the
chance that these are inconsistent or incorrect. See also block/blk-pm.c for
the code that sets q->rpm_status.

Thanks,

Bart.