Re: [PATCH v2 01/18] ata: libata: allow ata_scsi_set_sense() to not set CHECK_CONDITION

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On 1/12/23 15:03, Niklas Cassel wrote:
Current ata_scsi_set_sense() calls scsi_build_sense(), which,
in addition to setting the sense data, unconditionally sets the
scsicmd->result to SAM_STAT_CHECK_CONDITION.

For Command Duration Limits policy 0xD:
The device shall complete the command without error (SAM_STAT_GOOD)
with the additional sense code set to DATA CURRENTLY UNAVAILABLE.

It is perfectly fine to have sense data for a command that returned
completion without error.

In order to support for CDL policy 0xD, we have to remove this
assumption that having sense data means that the command failed
(SAM_STAT_CHECK_CONDITION).

Add a new parameter to ata_scsi_set_sense() to allow us to set
sense data without unconditionally setting SAM_STAT_CHECK_CONDITION.
This new parameter will be used in a follow-up patch.

Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx>
---
  drivers/ata/libata-eh.c   |  3 ++-
  drivers/ata/libata-sata.c |  4 ++--
  drivers/ata/libata-scsi.c | 38 ++++++++++++++++++++------------------
  drivers/ata/libata.h      |  4 ++--
  4 files changed, 26 insertions(+), 23 deletions(-)

Reviewed-by: Hannes Reinecke <hare@xxxxxxx>

Cheers,

Hannes
--
Dr. Hannes Reinecke                Kernel Storage Architect
hare@xxxxxxx                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Ivo Totev, Andrew
Myers, Andrew McDonald, Martje Boudien Moerman




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