2019-09-26 10:26:36

by Daniel Wagner

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

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 <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>
---
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

2019-09-26 11:00:13

by Hannes Reinecke

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 <[email protected]>
> Signed-off-by: Daniel Wagner <[email protected]>
> ---
> 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 <[email protected]>

Cheers,

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

2019-09-27 02:48:15

by Bart Van Assche

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 <[email protected]>
> Signed-off-by: Daniel Wagner <[email protected]>
> ---
> 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 <[email protected]>

2019-09-27 07:32:21

by Daniel Wagner

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

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 <[email protected]>

Thanks!
Daniel