scsi: libsas: Use void for sas_discover_event() return code

The callers of function sas_discover_event() do not check its return value.
The function also only ever returns 0, so use void instead.

Link: https://lore.kernel.org/r/1644561778-183074-2-git-send-email-chenxiang66@hisilicon.comReviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/libsas/sas_discover.c

@@ -545,19 +545,17 @@ static void sas_chain_event(int event, unsigned long *pending,
 	}
 }
 
-int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
+void sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
 {
 	struct sas_discovery *disc;
 
 	if (!port)
-		return 0;
+		return;
 	disc = &port->disc;
 
 	BUG_ON(ev >= DISC_NUM_EVENTS);
 
 	sas_chain_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha);
-
-	return 0;
 }
 
 /**

include/scsi/libsas.h

@@ -684,7 +684,7 @@ int  sas_ex_revalidate_domain(struct domain_device *);
 
 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
-int  sas_discover_event(struct asd_sas_port *, enum discover_event ev);
+void sas_discover_event(struct asd_sas_port *, enum discover_event ev);
 
 int  sas_discover_sata(struct domain_device *);
 int  sas_discover_end_dev(struct domain_device *);