linux-kernel - Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont

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Message-ID: <5d5931ef-7ffa-3f3f-bb5e-5379c1716d04@acm.org>
Date:   Thu, 26 Sep 2019 19:45:50 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Daniel Wagner <dwagner@...e.de>, qla2xxx-upstream@...gic.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in
 qla2x00_status_cont_entry()

On 2019-09-26 00:46, Daniel Wagner wrote:
> Commit 88263208dd23 ("scsi: qla2xxx: Complain if sp->done() is not
> called from the completion path") introduced the WARN_ON_ONCE in
> qla2x00_status_cont_entry(). The assumption was that there is only one
> status continuations element. According to the firmware documentation
> it is possible that multiple status continuations are emitted by the
> firmware.
> 
> Cc: Bart Van Assche <bvanassche@....org>
> Signed-off-by: Daniel Wagner <dwagner@...e.de>
> ---
>  drivers/scsi/qla2xxx/qla_isr.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
> index 4c26630c1c3e..009fd5a33fcd 100644
> --- a/drivers/scsi/qla2xxx/qla_isr.c
> +++ b/drivers/scsi/qla2xxx/qla_isr.c
> @@ -2837,8 +2837,6 @@ qla2x00_status_cont_entry(struct rsp_que *rsp, sts_cont_entry_t *pkt)
>  	if (sense_len == 0) {
>  		rsp->status_srb = NULL;
>  		sp->done(sp, cp->result);
> -	} else {
> -		WARN_ON_ONCE(true);
>  	}
>  }

Should the following be added?

Fixes: 88263208dd23 ("scsi: qla2xxx: Complain if sp->done() is not
called from the completion path")

Anyway:

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