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Date: Wed, 23 Jun 2021 15:42:29 -0500
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Can Guo <cang@...eaurora.org>
Cc: asutoshd@...eaurora.org, nguyenb@...eaurora.org,
hongwus@...eaurora.org, ziqichen@...eaurora.org,
linux-scsi@...r.kernel.org, kernel-team@...roid.com,
Andy Gross <agross@...nel.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>,
Bart Van Assche <bvanassche@....org>,
"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 Wed 23 Jun 02:35 CDT 2021, Can Guo wrote:
> Rename pm_op_in_progress and is_sys_suspended to wlu_pm_op_in_progress and
> is_wlu_sys_suspended accordingly.
>
This reflects what the change does, but the commit message is supposed
to capture "why".
Regards,
Bjorn
> Signed-off-by: Can Guo <cang@...eaurora.org>
> ---
> drivers/scsi/ufs/ufs-qcom.c | 2 +-
> drivers/scsi/ufs/ufshcd.c | 30 +++++++++++++++---------------
> drivers/scsi/ufs/ufshcd.h | 6 ++++--
> 3 files changed, 20 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index 9b1d18d..fbe21e0 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -641,7 +641,7 @@ static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> if (err)
> return err;
>
> - hba->is_sys_suspended = false;
> + hba->is_wlu_sys_suspended = false;
> return 0;
> }
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 25fe18a..c40ba1d 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -549,8 +549,8 @@ static void ufshcd_print_host_state(struct ufs_hba *hba)
> hba->saved_err, hba->saved_uic_err);
> dev_err(hba->dev, "Device power mode=%d, UIC link state=%d\n",
> hba->curr_dev_pwr_mode, hba->uic_link_state);
> - dev_err(hba->dev, "PM in progress=%d, sys. suspended=%d\n",
> - hba->pm_op_in_progress, hba->is_sys_suspended);
> + dev_err(hba->dev, "wlu_pm_op_in_progress=%d, is_wlu_sys_suspended=%d\n",
> + hba->wlu_pm_op_in_progress, hba->is_wlu_sys_suspended);
> dev_err(hba->dev, "Auto BKOPS=%d, Host self-block=%d\n",
> hba->auto_bkops_enabled, hba->host->host_self_blocked);
> dev_err(hba->dev, "Clk gate=%d\n", hba->clk_gating.state);
> @@ -1999,7 +1999,7 @@ static void ufshcd_clk_scaling_start_busy(struct ufs_hba *hba)
> if (!hba->clk_scaling.active_reqs++)
> queue_resume_work = true;
>
> - if (!hba->clk_scaling.is_enabled || hba->pm_op_in_progress) {
> + if (!hba->clk_scaling.is_enabled || hba->wlu_pm_op_in_progress) {
> spin_unlock_irqrestore(hba->host->host_lock, flags);
> return;
> }
> @@ -2734,7 +2734,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
> * err handler blocked for too long. So, just fail the scsi cmd
> * sent from PM ops, err handler can recover PM error anyways.
> */
> - if (hba->pm_op_in_progress) {
> + if (hba->wlu_pm_op_in_progress) {
> hba->force_reset = true;
> set_host_byte(cmd, DID_BAD_TARGET);
> cmd->scsi_done(cmd);
> @@ -2767,7 +2767,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
> (hba->clk_gating.state != CLKS_ON));
>
> if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
> - if (hba->pm_op_in_progress)
> + if (hba->wlu_pm_op_in_progress)
> set_host_byte(cmd, DID_BAD_TARGET);
> else
> err = SCSI_MLQUEUE_HOST_BUSY;
> @@ -5116,7 +5116,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
> * solution could be to abort the system suspend if
> * UFS device needs urgent BKOPs.
> */
> - if (!hba->pm_op_in_progress &&
> + if (!hba->wlu_pm_op_in_progress &&
> !ufshcd_eh_in_progress(hba) &&
> ufshcd_is_exception_event(lrbp->ucd_rsp_ptr))
> /* Flushed in suspend */
> @@ -5916,7 +5916,7 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
> {
> ufshcd_rpm_get_sync(hba);
> if (pm_runtime_status_suspended(&hba->sdev_ufs_device->sdev_gendev) ||
> - hba->is_sys_suspended) {
> + hba->is_wlu_sys_suspended) {
> enum ufs_pm_op pm_op;
>
> /*
> @@ -5933,7 +5933,7 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
> if (!ufshcd_is_clkgating_allowed(hba))
> ufshcd_setup_clocks(hba, true);
> ufshcd_release(hba);
> - pm_op = hba->is_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
> + pm_op = hba->is_wlu_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
> ufshcd_vops_resume(hba, pm_op);
> } else {
> ufshcd_hold(hba, false);
> @@ -5976,7 +5976,7 @@ static void ufshcd_recover_pm_error(struct ufs_hba *hba)
> struct request_queue *q;
> int ret;
>
> - hba->is_sys_suspended = false;
> + hba->is_wlu_sys_suspended = false;
> /*
> * Set RPM status of wlun device to RPM_ACTIVE,
> * this also clears its runtime error.
> @@ -8784,7 +8784,7 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> enum ufs_dev_pwr_mode req_dev_pwr_mode;
> enum uic_link_state req_link_state;
>
> - hba->pm_op_in_progress = true;
> + hba->wlu_pm_op_in_progress = true;
> if (pm_op != UFS_SHUTDOWN_PM) {
> pm_lvl = pm_op == UFS_RUNTIME_PM ?
> hba->rpm_lvl : hba->spm_lvl;
> @@ -8919,7 +8919,7 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> hba->clk_gating.is_suspended = false;
> ufshcd_release(hba);
> }
> - hba->pm_op_in_progress = false;
> + hba->wlu_pm_op_in_progress = false;
> return ret;
> }
>
> @@ -8928,7 +8928,7 @@ static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> int ret;
> enum uic_link_state old_link_state = hba->uic_link_state;
>
> - hba->pm_op_in_progress = true;
> + hba->wlu_pm_op_in_progress = true;
>
> /*
> * Call vendor specific resume callback. As these callbacks may access
> @@ -9006,7 +9006,7 @@ static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> ufshcd_update_evt_hist(hba, UFS_EVT_WL_RES_ERR, (u32)ret);
> hba->clk_gating.is_suspended = false;
> ufshcd_release(hba);
> - hba->pm_op_in_progress = false;
> + hba->wlu_pm_op_in_progress = false;
> return ret;
> }
>
> @@ -9072,7 +9072,7 @@ static int ufshcd_wl_suspend(struct device *dev)
>
> out:
> if (!ret)
> - hba->is_sys_suspended = true;
> + hba->is_wlu_sys_suspended = true;
> trace_ufshcd_wl_suspend(dev_name(dev), ret,
> ktime_to_us(ktime_sub(ktime_get(), start)),
> hba->curr_dev_pwr_mode, hba->uic_link_state);
> @@ -9100,7 +9100,7 @@ static int ufshcd_wl_resume(struct device *dev)
> ktime_to_us(ktime_sub(ktime_get(), start)),
> hba->curr_dev_pwr_mode, hba->uic_link_state);
> if (!ret)
> - hba->is_sys_suspended = false;
> + hba->is_wlu_sys_suspended = false;
> up(&hba->host_sem);
> return ret;
> }
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index c98d540..93aeeb3 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -752,7 +752,8 @@ struct ufs_hba {
> enum ufs_pm_level spm_lvl;
> struct device_attribute rpm_lvl_attr;
> struct device_attribute spm_lvl_attr;
> - int pm_op_in_progress;
> + /* A flag to tell whether __ufshcd_wl_suspend/resume() is in progress */
> + bool wlu_pm_op_in_progress;
>
> /* Auto-Hibernate Idle Timer register value */
> u32 ahit;
> @@ -838,7 +839,8 @@ struct ufs_hba {
>
> struct devfreq *devfreq;
> struct ufs_clk_scaling clk_scaling;
> - bool is_sys_suspended;
> + /* A flag to tell whether the UFS device W-LU is system suspended */
> + bool is_wlu_sys_suspended;
>
> enum bkops_status urgent_bkops_lvl;
> bool is_urgent_bkops_lvl_checked;
> --
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
>
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