linux-kernel - Re: [PATCH v4 05/10] scsi: ufs: Remove a redundant tag check in ufshcd

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Message-ID: <f98b3db3-f0cb-952d-b87e-acb7307e2090@acm.org>
Date:   Wed, 23 Jun 2021 14:24:38 -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:     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>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 05/10] scsi: ufs: Remove a redundant tag check in
 ufshcd_queuecommand()

On 6/23/21 12:35 AM, Can Guo wrote:
> Since commit a45f937110fa6b0c2c06a5d3ef026963a5759050 ("scsi: ufs: Optimize

Please shorten commit IDs to 12 characters.

> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 5f837c4..3695dd2 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -2768,15 +2768,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
>  	WARN_ON(ufshcd_is_clkgating_allowed(hba) &&
>  		(hba->clk_gating.state != CLKS_ON));
>  
> -	if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
> -		if (hba->wlu_pm_op_in_progress)
> -			set_host_byte(cmd, DID_BAD_TARGET);
> -		else
> -			err = SCSI_MLQUEUE_HOST_BUSY;
> -		ufshcd_release(hba);
> -		goto out;
> -	}

I have never encountered code like the above in any other SCSI LLD. Anyway:

Reviewed-by: Bart Van Assche <bvanassche@....org>