seq: user_client: just return when character device is not opened

It's programming mistake when operating without opening character device.

This commit uses GLib macro just return in the case with warnings.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

diff --git a/src/seq/user-client.c b/src/seq/user-client.c
index 8cffe2786dfa2178d32bb67486f34f64dfb24cdc..5b5338bb0f893d4e20173f450e4e5ebba59b9ba7 100644 (file)
--- a/src/seq/user-client.c
+++ b/src/seq/user-client.c
@@ -214,15 +214,11 @@ void alsaseq_user_client_get_protocol_version(ALSASeqUserClient *self,
 
     g_return_if_fail(ALSASEQ_IS_USER_CLIENT(self));
     priv = alsaseq_user_client_get_instance_private(self);
+    g_return_if_fail(priv->fd >= 0);
 
     g_return_if_fail(proto_ver_triplet != NULL);
     g_return_if_fail(error == NULL || *error == NULL);
 
-    if (priv->fd < 0) {
-        generate_error(error, ENXIO);
-        return;
-    }
-
     *proto_ver_triplet = (const guint16 *)priv->proto_ver_triplet;
 }
 
@@ -592,15 +588,11 @@ void alsaseq_user_client_create_source(ALSASeqUserClient *self,
 
     g_return_if_fail(ALSASEQ_IS_USER_CLIENT(self));
     priv = alsaseq_user_client_get_instance_private(self);
+    g_return_if_fail(priv->fd >= 0);
 
     g_return_if_fail(gsrc != NULL);
     g_return_if_fail(error == NULL || *error == NULL);
 
-    if (priv->fd < 0) {
-        generate_error(error, ENXIO);
-        return;
-    }
-
     buf = g_malloc0(page_size);
 
     *gsrc = g_source_new(&funcs, sizeof(*src));