linux-kernel - Re: [EXT] [PATCH v4] qla2xxx: Return EBUSY on fcport deletion

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Message-ID: <alpine.LRH.2.21.9999.2010221245090.28578@irv1user01.caveonetworks.com>
Date:   Thu, 22 Oct 2020 12:46:21 -0700
From:   Arun Easi <aeasi@...vell.com>
To:     Daniel Wagner <dwagner@...e.de>
CC:     Nilesh Javali <njavali@...vell.com>, <linux-scsi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Finn Thain <fthain@...egraphics.com.au>
Subject: Re: [EXT] [PATCH v4] qla2xxx: Return EBUSY on fcport deletion

On Wed, 14 Oct 2020, 12:30am, Daniel Wagner wrote:

> External Email
> 
> ----------------------------------------------------------------------
> When the fcport is about to be deleted we should return EBUSY instead
> of ENODEV. Only for EBUSY the request will be requeued in a multipath
> setup.
> 
> Also when the firmware has not yet started return EBUSY to avoid
> dropping the request.
> 
> Signed-off-by: Daniel Wagner <dwagner@...e.de>
> Reviewed-by: Arun Easi <aeasi@...vell.com>
> ---
> 
> v4: updated commit message as suggested by Finn
> v3: simplify and changed test logic as suggested by Arun
> v2: rebased on mkp/staging
> 
>  drivers/scsi/qla2xxx/qla_nvme.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
> index 2cd9bd288910..1fa457a5736e 100644
> --- a/drivers/scsi/qla2xxx/qla_nvme.c
> +++ b/drivers/scsi/qla2xxx/qla_nvme.c
> @@ -555,10 +555,12 @@ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
>  
>  	fcport = qla_rport->fcport;
>  
> -	if (!qpair || !fcport || (qpair && !qpair->fw_started) ||
> -	    (fcport && fcport->deleted))
> +	if (!qpair || !fcport)
>  		return -ENODEV;
>  
> +	if (!qpair->fw_started || fcport->deleted)
> +		return -EBUSY;
> +
>  	vha = fcport->vha;
>  
>  	if (!(fcport->nvme_flag & NVME_FLAG_REGISTERED))
> 

Looks good to me.

Regards,
-Arun