scsi: isci: Remove redundant check in isci_task_request_build()

sci_task_request_construct_ssp() has invariant return. Change this function
to void and get rid of unnecessary checks.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Artem Chernyshev <artem.chernyshev@red-soft.ru>
Link: https://lore.kernel.org/r/20231128121159.2373975-1-artem.chernyshev@red-soft.ru
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: dTenebrae

drivers/scsi/isci/request.c

@@ -738,8 +738,7 @@ static enum sci_status sci_io_request_construct_basic_ssp(struct isci_request *i
 	return SCI_SUCCESS;
 }
 
-enum sci_status sci_task_request_construct_ssp(
-	struct isci_request *ireq)
+void sci_task_request_construct_ssp(struct isci_request *ireq)
 {
 	/* Construct the SSP Task SCU Task Context */
 	scu_ssp_task_request_construct_task_context(ireq);
@@ -748,8 +747,6 @@ enum sci_status sci_task_request_construct_ssp(
 	sci_task_request_build_ssp_task_iu(ireq);
 
 	sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED);
-
-	return SCI_SUCCESS;
 }
 
 static enum sci_status sci_io_request_construct_basic_sata(struct isci_request *ireq)

drivers/scsi/isci/request.h

@@ -300,7 +300,7 @@ sci_task_request_construct(struct isci_host *ihost,
 			    struct isci_remote_device *idev,
 			    u16 io_tag,
 			    struct isci_request *ireq);
-enum sci_status sci_task_request_construct_ssp(struct isci_request *ireq);
+void sci_task_request_construct_ssp(struct isci_request *ireq);
 void sci_smp_request_copy_response(struct isci_request *ireq);
 
 static inline int isci_task_is_ncq_recovery(struct sas_task *task)

drivers/scsi/isci/task.c

@@ -243,9 +243,7 @@ static struct isci_request *isci_task_request_build(struct isci_host *ihost,
 	/* XXX convert to get this from task->tproto like other drivers */
 	if (dev->dev_type == SAS_END_DEVICE) {
 		isci_tmf->proto = SAS_PROTOCOL_SSP;
-		status = sci_task_request_construct_ssp(ireq);
-		if (status != SCI_SUCCESS)
-			return NULL;
+		sci_task_request_construct_ssp(ireq);
 	}
 
 	return ireq;