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

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Message-ID: <f9db33a2-a1cb-5917-aa81-04a5d1f388db@suse.de>
Date:   Thu, 26 Sep 2019 11:43:24 +0200
From:   Hannes Reinecke <hare@...e.de>
To:     Daniel Wagner <dwagner@...e.de>, qla2xxx-upstream@...gic.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bart Van Assche <bvanassche@....org>
Subject: Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in
 qla2x00_status_cont_entry()

On 9/26/19 9:46 AM, 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);
>  	}
>  }
>  
> 
Not that I can speak for firmware documentation, but:
Reviewed-by: Hannes Reinecke <hare@...e.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      Teamlead Storage & Networking
hare@...e.de			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
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