[PATCH 3/4] ofono: combine create_device and ready_to_create_device

These two functions are called one after the other, repeating the same
comment in multiple places.  Combine them into a single function that
takes care of checking whether the device can be created, and if so,
creating it.  Move the repeated comment to the new function.

While here, refactor handling of 'ident' which removes the need for the
'out' label.  Also, simplify some logic left over from CDMA support that
was checking whether modem->imsi exists.
---
 plugins/ofono.c | 75 ++++++++++++++++++-------------------------------
 1 file changed, 28 insertions(+), 47 deletions(-)

diff --git a/plugins/ofono.c b/plugins/ofono.c
index fd8b442a674c..ad85c55d3df3 100644
--- a/plugins/ofono.c
+++ b/plugins/ofono.c
@@ -957,57 +957,56 @@ out:
 
 /*
  * This functions tests if we have the necessary information gathered
- * before we are able to create a device.
+ * in order to create the device.
  */
-static bool ready_to_create_device(struct modem_data *modem)
+static bool try_create_device(struct modem_data *modem)
 {
+	struct connman_device *device;
+	char *ident;
+
+	DBG("%s", modem->path);
+
 	if (modem->device)
 		return false;
 
 	if (!modem->imsi)
 		return false;
 
-	return true;
-}
-
-static void create_device(struct modem_data *modem)
-{
-	struct connman_device *device;
-	char *ident = NULL;
 
-	DBG("%s", modem->path);
+	/*
+	 * Create the device and register it at the core. Enabling (setting
+	 * it online is done through the modem_enable() callback.
+	 */
+	device = connman_device_create("ofono", CONNMAN_DEVICE_TYPE_CELLULAR);
+	if (!device) {
+		connman_error("Failed to create device for modem on path: %s",
+				modem->path);
+		return false;
+	}
 
-	if (modem->imsi)
-		ident = modem->imsi;
+	DBG("created device %p", device);
 
-	if (!connman_dbus_validate_ident(ident))
-		ident = connman_dbus_encode_string(ident);
+	if (!connman_dbus_validate_ident(modem->imsi))
+		ident = connman_dbus_encode_string(modem->imsi);
 	else
-		ident = g_strdup(ident);
-
-	device = connman_device_create("ofono", CONNMAN_DEVICE_TYPE_CELLULAR);
-	if (!device)
-		goto out;
-
-	DBG("device %p", device);
+		ident = g_strdup(modem->imsi);
 
 	connman_device_set_ident(device, ident);
+	g_free(ident);
 
 	connman_device_set_string(device, "Path", modem->path);
-
 	connman_device_set_data(device, modem);
 
 	if (connman_device_register(device) < 0) {
-		connman_error("Failed to register cellular device");
+		connman_error("Failed to register cellular device %p", device);
 		connman_device_unref(device);
-		goto out;
+		return false;
 	}
 
 	modem->device = device;
-
 	connman_device_set_powered(modem->device, modem->online);
-out:
-	g_free(ident);
+
+	return true;
 }
 
 static void destroy_device(struct modem_data *modem)
@@ -1835,17 +1834,7 @@ static gboolean sim_changed(DBusConnection *conn, DBusMessage *message,
 
 	if (g_str_equal(key, "SubscriberIdentity")) {
 		sim_update_imsi(modem, &value);
-
-		if (!ready_to_create_device(modem))
-			return TRUE;
-
-		/*
-		 * This is a GSM modem. Create the device and
-		 * register it at the core. Enabling (setting
-		 * it online is done through the
-		 * modem_enable() callback.
-		 */
-		create_device(modem);
+		try_create_device(modem);
 	}
 
 	return TRUE;
@@ -1869,17 +1858,9 @@ static void sim_properties_reply(struct modem_data *modem,
 		if (g_str_equal(key, "SubscriberIdentity")) {
 			sim_update_imsi(modem, &value);
 
-			if (!ready_to_create_device(modem))
+			if (!try_create_device(modem))
 				return;
 
-			/*
-			 * This is a GSM modem. Create the device and
-			 * register it at the core. Enabling (setting
-			 * it online is done through the
-			 * modem_enable() callback.
-			 */
-			create_device(modem);
-
 			if (!modem->online)
 				return;
 
-- 
2.43.0