linux-kernel - Re: [PATCH v1 2/2] scsi: ufs: Fix and simplify setup_xfer

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Message-ID: <74cc1ad32c414762ab5d18ed8b46c26a@codeaurora.org>
Date:   Tue, 14 Jul 2020 17:19:29 +0800
From:   Can Guo <cang@...eaurora.org>
To:     Stanley Chu <stanley.chu@...iatek.com>
Cc:     linux-scsi@...r.kernel.org, martin.petersen@...cle.com,
        avri.altman@....com, alim.akhtar@...sung.com, jejb@...ux.ibm.com,
        bvanassche@....org, beanhuo@...ron.com, asutoshd@...eaurora.org,
        matthias.bgg@...il.com, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kuohong.wang@...iatek.com, peter.wang@...iatek.com,
        chun-hung.wu@...iatek.com, andy.teng@...iatek.com,
        chaotian.jing@...iatek.com, cc.chou@...iatek.com
Subject: Re: [PATCH v1 2/2] scsi: ufs: Fix and simplify setup_xfer_req variant
 operation

On 2020-07-06 14:07, Stanley Chu wrote:
> Add missing "setup_xfer_req" call in ufshcd_issue_devman_upiu_cmd()
> by ufs-bsg path, and collect all "setup_xfer_req" calls to an unified
> place, i.e., ufshcd_send_command(), to simplify the driver.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>

Reviewed-by: Can Guo <cang@...eaurora.org>

> ---
>  drivers/scsi/ufs/ufshcd.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 71e8d7c782bd..8603b07045a6 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -1925,8 +1925,11 @@ static void
> ufshcd_clk_scaling_update_busy(struct ufs_hba *hba)
>  static inline
>  void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
>  {
> -	hba->lrb[task_tag].issue_time_stamp = ktime_get();
> -	hba->lrb[task_tag].compl_time_stamp = ktime_set(0, 0);
> +	struct ufshcd_lrb *lrbp = &hba->lrb[task_tag];
> +
> +	lrbp->issue_time_stamp = ktime_get();
> +	lrbp->compl_time_stamp = ktime_set(0, 0);
> +	ufshcd_vops_setup_xfer_req(hba, task_tag, (lrbp->cmd ? true : 
> false));
>  	ufshcd_add_command_trace(hba, task_tag, "send");
>  	ufshcd_clk_scaling_start_busy(hba);
>  	__set_bit(task_tag, &hba->outstanding_reqs);
> @@ -2544,7 +2547,6 @@ static int ufshcd_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *cmd)
> 
>  	/* issue command to the controller */
>  	spin_lock_irqsave(hba->host->host_lock, flags);
> -	ufshcd_vops_setup_xfer_req(hba, tag, true);
>  	ufshcd_send_command(hba, tag);
>  out_unlock:
>  	spin_unlock_irqrestore(hba->host->host_lock, flags);
> @@ -2731,7 +2733,6 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba 
> *hba,
>  	/* Make sure descriptors are ready before ringing the doorbell */
>  	wmb();
>  	spin_lock_irqsave(hba->host->host_lock, flags);
> -	ufshcd_vops_setup_xfer_req(hba, tag, false);
>  	ufshcd_send_command(hba, tag);
>  	spin_unlock_irqrestore(hba->host->host_lock, flags);