Commit a9ee3f84 authored by John Garry's avatar John Garry Committed by Martin K. Petersen
Browse files

scsi: libsas: Add sas_task_find_rq() 



blk-mq already provides a unique tag per request. Some libsas LLDDs - like
hisi_sas - already use this tag as the unique per-I/O HW tag.

Add a common function to provide the request associated with a sas_task for
all libsas LLDDs.

Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1666091763-11023-2-git-send-email-john.garry@huawei.com


Reviewed-by: default avatarJack Wang <jinpu.wang@ionos.com>
Reviewed-by: default avatarJason Yan <yanaijie@huawei.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 621a323c

include/scsi/libsas.h

+18 −0
Original line number Diff line number Diff line
@@ -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 *);