On Fri, Sep 30, 2022 at 11:03 AM John Garry <john.garry@xxxxxxxxxx> wrote:
>
> blk-mq already provides a unique tag per request. Some libsas LLDDs - like
> hisi_sas - already use this tag as the unique per-IO HW tag.
>
> Add a common function to provide the request associated with a sas_task
> for all libsas LLDDs.
>
> Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
lgtm
Reviewed-by: Jack Wang <jinpu.wang@xxxxxxxxx>
> ---
> include/scsi/libsas.h | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
> index f86b56bf7833..f498217961db 100644
> --- a/include/scsi/libsas.h
> +++ b/include/scsi/libsas.h
> @@ -644,6 +644,24 @@ static inline bool sas_is_internal_abort(struct sas_task *task)
> return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
> }
>
> +static inline struct request *sas_task_find_rq(struct sas_task *task)
> +{
> + struct scsi_cmnd *scmd;
> +
> + if (task->task_proto & SAS_PROTOCOL_STP_ALL) {
> + struct ata_queued_cmd *qc = task->uldd_task;
> +
> + scmd = qc ? qc->scsicmd : NULL;
> + } else {
> + scmd = task->uldd_task;
> + }
> +
> + if (!scmd)
> + return NULL;
> +
> + return scsi_cmd_to_rq(scmd);
> +}
> +
> struct sas_domain_function_template {
> /* The class calls these to notify the LLDD of an event. */
> void (*lldd_port_formed)(struct asd_sas_phy *);
> --
> 2.35.3
>
