linux-kernel - RE: [EXT] [PATCH] scsi: ufs-bsg: Fix runtime PM imbalance on error

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Date:   Fri, 22 May 2020 08:36:56 +0000
From:   "Bean Huo (beanhuo)" <beanhuo@...ron.com>
To:     Dinghao Liu <dinghao.liu@....edu.cn>, "kjlu@....edu" <kjlu@....edu>
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>,
        Bart Van Assche <bvanassche@....org>,
        Can Guo <cang@...eaurora.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] [PATCH] scsi: ufs-bsg: Fix runtime PM imbalance on error

>  1 file changed, 3 insertions(+), 1 deletion(-)
Hi, Dinghao
> 
> diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c index
> 53dd87628cbe..516a7f573942 100644
> --- a/drivers/scsi/ufs/ufs_bsg.c
> +++ b/drivers/scsi/ufs/ufs_bsg.c
> @@ -106,8 +106,10 @@ static int ufs_bsg_request(struct bsg_job *job)
>  		desc_op = bsg_request->upiu_req.qr.opcode;
>  		ret = ufs_bsg_alloc_desc_buffer(hba, job, &desc_buff,
>  						&desc_len, desc_op);
> -		if (ret)
> +		if (ret) {
> +			pm_runtime_put_sync(hba->dev);

No  need to add pm_runtime_put_sync() here, you can change "goto out" to "break",
Or move original pm_runtime_put_sync() to after goto label.

>  			goto out;
> +		}
> 
>  		/* fall through */
>  	case UPIU_TRANSACTION_NOP_OUT:
> --
> 2.17.1