linux-kernel - Re: [PATCH] scsi: ufs: Remove an unpaired ufshcd_scsi_unblock_requests() in err

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Message-ID: <20200818054237.GA880@asutoshd-linux1.qualcomm.com>
Date:   Mon, 17 Aug 2020 22:42:37 -0700
From:   Asutosh Das <asutoshd@...eaurora.org>
To:     Can Guo <cang@...eaurora.org>
Cc:     nguyenb@...eaurora.org, hongwus@...eaurora.org,
        rnayak@...eaurora.org, linux-scsi@...r.kernel.org,
        kernel-team@...roid.com, saravanak@...gle.com, salyzyn@...gle.com,
        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>,
        Bart Van Assche <bvanassche@....org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: ufs: Remove an unpaired
 ufshcd_scsi_unblock_requests() in err_handler()

On Mon, Aug 17 2020 at 22:21 -0700, Can Guo wrote:
>Commit 5586dd8ea250a ("scsi: ufs: Fix a race condition between error
>handler and runtime PM ops") moves the ufshcd_scsi_block_requests() inside
>err_handler(), but forgets to remove the ufshcd_scsi_unblock_requests() in
>the early return path. Correct the coding mistake.
>
>Signed-off-by: Can Guo <cang@...eaurora.org>
>
Reviewed-by: Asutosh Das <asutoshd@...eaurora.org>

>diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
>index 2b55c2e..b8441ad 100644
>--- a/drivers/scsi/ufs/ufshcd.c
>+++ b/drivers/scsi/ufs/ufshcd.c
>@@ -5670,7 +5670,6 @@ static void ufshcd_err_handler(struct work_struct *work)
> 		if (hba->ufshcd_state != UFSHCD_STATE_ERROR)
> 			hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
> 		spin_unlock_irqrestore(hba->host->host_lock, flags);
>-		ufshcd_scsi_unblock_requests(hba);
> 		return;
> 	}
> 	ufshcd_set_eh_in_progress(hba);
>-- 
>Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
>