[PATCH v4 04/36] scsi: Add scsi_failure field to scsi_exec_args

[Mike Christie <michael.christie@oracle.com>]

Allow SCSI execution callers to pass in a list of failures they want
retried.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/scsi/scsi_lib.c    | 1 +
 include/scsi/scsi_device.h | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f0c55e2621da..0ad0e476f2cf 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -215,6 +215,7 @@ int __scsi_exec_req(const struct scsi_exec_args *args)
 	scmd->cmd_len = COMMAND_SIZE(args->cmd[0]);
 	memcpy(scmd->cmnd, args->cmd, scmd->cmd_len);
 	scmd->allowed = args->retries;
+	scmd->failures = args->failures;
 	req->timeout = args->timeout;
 	req->cmd_flags |= args->op_flags;
 	req->rq_flags |= args->req_flags | RQF_QUIET;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index d49a7157d7c1..72d1690f4ff1 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -14,6 +14,7 @@ struct bsg_device;
 struct device;
 struct request_queue;
 struct scsi_cmnd;
+struct scsi_failure;
 struct scsi_lun;
 struct scsi_sense_hdr;
 
@@ -470,6 +471,7 @@ struct scsi_exec_args {
 	blk_opf_t op_flags;		/* flags for ->cmd_flags */
 	req_flags_t req_flags;		/* flags for ->rq_flags */
 	int *resid;			/* optional residual length */
+	struct scsi_failure *failures;	/* optional failures to retry */
 };
 
 extern int __scsi_exec_req(const struct scsi_exec_args *args);
-- 
2.25.1