drbd: drbd_adm_prepare(): Only set adm_ctx.connection when a connection is requested

Also change drbd_adm_connect() to expect a resource after it requested one.
Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>

drivers/block/drbd/drbd_nl.c

@@ -216,10 +216,6 @@ static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
 	adm_ctx.device = minor_to_device(d_in->minor);
 	if (adm_ctx.resource_name) {
 		adm_ctx.resource = drbd_find_resource(adm_ctx.resource_name);
-		if (adm_ctx.resource) {
-			adm_ctx.connection = first_connection(adm_ctx.resource);
-			kref_get(&adm_ctx.connection->kref);
-		}
 	}
 
 	if (!adm_ctx.device && (flags & DRBD_ADM_NEED_MINOR)) {
@@ -234,7 +230,7 @@ static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
 	}
 
 	if (flags & DRBD_ADM_NEED_CONNECTION) {
-		if (adm_ctx.connection && !(flags & DRBD_ADM_NEED_RESOURCE)) {
+		if (adm_ctx.resource) {
 			drbd_msg_put_info("no resource name expected");
 			return ERR_INVALID_REQUEST;
 		}
@@ -2211,7 +2207,7 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
 		}
 	}
 
-	connection = adm_ctx.connection;
+	connection = first_connection(adm_ctx.resource);
 	conn_reconfig_start(connection);
 
 	if (connection->cstate > C_STANDALONE) {