ipmi: ipmi_unregister_smi() cannot fail, have it return void

Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_msghandler.c

@@ -3711,7 +3711,7 @@ static void cleanup_smi_msgs(struct ipmi_smi *intf)
 	}
 }
 
-int ipmi_unregister_smi(struct ipmi_smi *intf)
+void ipmi_unregister_smi(struct ipmi_smi *intf)
 {
 	struct ipmi_smi_watcher *w;
 	int intf_num = intf->intf_num, index;
@@ -3755,8 +3755,6 @@ int ipmi_unregister_smi(struct ipmi_smi *intf)
 
 	cleanup_srcu_struct(&intf->users_srcu);
 	kref_put(&intf->refcount, intf_free);
-
-	return 0;
 }
 EXPORT_SYMBOL(ipmi_unregister_smi);
 

drivers/char/ipmi/ipmi_si_intf.c

@@ -2365,16 +2365,13 @@ static void shutdown_smi(void *send_info)
 
 static void shutdown_one_si(struct smi_info *smi_info)
 {
-	int rv;
 	ipmi_smi_t intf = smi_info->intf;
 
 	if (!intf)
 		return;
 
 	smi_info->intf = NULL;
-	rv = ipmi_unregister_smi(intf);
-	if (rv)
-		pr_err(PFX "Unable to unregister device: errno=%d\n", rv);
+	ipmi_unregister_smi(intf);
 }
 
 static void cleanup_one_si(struct smi_info *smi_info)

drivers/char/ipmi/ipmi_ssif.c

@@ -1247,9 +1247,7 @@ static int ssif_remove(struct i2c_client *client)
 	 */
 	intf = ssif_info->intf;
 	ssif_info->intf = NULL;
-	rv = ipmi_unregister_smi(intf);
-	if (rv)
-		pr_err(PFX "Unable to unregister device: errno=%d\n", rv);
+	ipmi_unregister_smi(intf);
 
 	list_for_each_entry(addr_info, &ssif_infos, link) {
 		if (addr_info->client == client) {

include/linux/ipmi_smi.h

@@ -220,7 +220,7 @@ int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
  * Remove a low-level interface from the IPMI driver.  This will
  * return an error if the interface is still in use by a user.
  */
-int ipmi_unregister_smi(ipmi_smi_t intf);
+void ipmi_unregister_smi(ipmi_smi_t intf);
 
 /*
  * The lower layer reports received messages through this interface.