broadband-modem-qmi: allow subclassing the match of control vs net ports

By default we provide the implementation for the qmi_wwan driver,
where both control and net ports share the same USB interface.

src/mm-broadband-modem-qmi.c

@@ -225,19 +225,31 @@ mm_broadband_modem_qmi_get_port_qmi_for_data (MMBroadbandModemQmi  *self,
             NULL);
 }
 
-MMPortQmi *
+static MMPortQmi *
-mm_broadband_modem_qmi_peek_port_qmi_for_data (MMBroadbandModemQmi  *self,
+peek_port_qmi_for_data (MMBroadbandModemQmi  *self,
-                                               MMPort               *data,
+                        MMPort               *data,
-                                               GError              **error)
+                        GError              **error)
 {
     GList       *cdc_wdm_qmi_ports;
     GList       *l;
     const gchar *net_port_parent_path;
     MMPortQmi   *found = NULL;
+    const gchar *net_port_driver;
 
     g_assert (MM_IS_BROADBAND_MODEM_QMI (self));
     g_assert (mm_port_get_subsys (data) == MM_PORT_SUBSYS_NET);
 
+    net_port_driver = mm_kernel_device_get_driver (mm_port_peek_kernel_device (data));
+    if (g_strcmp0 (net_port_driver, "qmi_wwan") != 0) {
+        g_set_error (error,
+                     MM_CORE_ERROR,
+                     MM_CORE_ERROR_FAILED,
+                     "Unsupported QMI kernel driver for 'net/%s': %s",
+                     mm_port_get_device (data),
+                     net_port_driver);
+        return NULL;
+    }
+
     net_port_parent_path = mm_kernel_device_get_interface_sysfs_path (mm_port_peek_kernel_device (data));
     if (!net_port_parent_path) {
         g_set_error (error,
@@ -274,6 +286,16 @@ mm_broadband_modem_qmi_peek_port_qmi_for_data (MMBroadbandModemQmi  *self,
     return found;
 }
 
+MMPortQmi *
+mm_broadband_modem_qmi_peek_port_qmi_for_data (MMBroadbandModemQmi  *self,
+                                               MMPort               *data,
+                                               GError              **error)
+{
+    g_assert (MM_BROADBAND_MODEM_QMI_GET_CLASS (self)->peek_port_qmi_for_data);
+
+    return MM_BROADBAND_MODEM_QMI_GET_CLASS (self)->peek_port_qmi_for_data (self, data, error);
+}
+
 /*****************************************************************************/
 /* Create Bearer (Modem interface) */
 
@@ -9724,6 +9746,8 @@ mm_broadband_modem_qmi_class_init (MMBroadbandModemQmiClass *klass)
 
     g_type_class_add_private (object_class, sizeof (MMBroadbandModemQmiPrivate));
 
+    klass->peek_port_qmi_for_data = peek_port_qmi_for_data;
+
     object_class->finalize = finalize;
     object_class->dispose = dispose;
 

src/mm-broadband-modem-qmi.h

@@ -36,6 +36,10 @@ struct _MMBroadbandModemQmi {
 
 struct _MMBroadbandModemQmiClass{
     MMBroadbandModemClass parent;
+
+    MMPortQmi * (* peek_port_qmi_for_data) (MMBroadbandModemQmi  *self,
+                                            MMPort               *data,
+                                            GError              **error);
 };
 
 GType mm_broadband_modem_qmi_get_type (void);