linux-kernel - Re: [PATCH v4 09/10] scsi: ufs: Update the fast abort path in ufshcd

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Message-ID: <b28d71a7-3839-2c07-2630-6196ea10951f@acm.org>
Date:   Wed, 23 Jun 2021 14:33:54 -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 09/10] scsi: ufs: Update the fast abort path in
 ufshcd_abort() for PM requests

On 6/23/21 12:35 AM, Can Guo wrote:
> @@ -2737,7 +2737,7 @@ 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->wlu_pm_op_in_progress) {
> +		if (cmd->request->rq_flags & RQF_PM) {
>  			hba->force_reset = true;
>  			set_host_byte(cmd, DID_BAD_TARGET);
>  			cmd->scsi_done(cmd);

I'm still concerned that the above code may trigger data corruption. I
prefer that the above code is removed instead of being modified.

Thanks,

Bart.