[PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont_entry()

[PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont_entry()

[Daniel Wagner]

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@acm.org>
Signed-off-by: Daniel Wagner <dwagner@suse.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);
 	}
 }
 
-- 
2.16.4

Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont_entry()

[Hannes Reinecke]

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@acm.org>
> Signed-off-by: Daniel Wagner <dwagner@suse.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@suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      Teamlead Storage & Networking
hare@suse.de			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 247165 (AG München), GF: Felix Imendörffer

Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont_entry()

[Bart Van Assche]

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@acm.org>
> Signed-off-by: Daniel Wagner <dwagner@suse.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@acm.org>

Re: [PATCH] scsi: qla2xxx: Remove WARN_ON_ONCE in qla2x00_status_cont_entry()

[Daniel Wagner]

Hi,

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

Good point. Just send out and updated version

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

Thanks!
Daniel