bearer-mbim: enable multiplex support for wwan devices

configure.ac

@@ -413,7 +413,7 @@ dnl-----------------------------------------------------------------------------
 dnl MBIM support (enabled by default)
 dnl
 
-LIBMBIM_VERSION=1.27.7
+LIBMBIM_VERSION=1.27.8
 
 AC_ARG_WITH(mbim, AS_HELP_STRING([--without-mbim], [Build without MBIM support]), [], [with_mbim=yes])
 AM_CONDITIONAL(WITH_MBIM, test "x$with_mbim" = "xyes")

meson.build

@@ -243,7 +243,7 @@ config_h.set('WITH_AT_COMMAND_VIA_DBUS', enable_at_command_via_dbus)
 # MBIM support (enabled by default)
 enable_mbim = get_option('mbim')
 if enable_mbim
-  mbim_glib_dep = dependency('mbim-glib', version: '>= 1.27.7')
+  mbim_glib_dep = dependency('mbim-glib', version: '>= 1.27.8')
 endif
 config_h.set('WITH_MBIM', enable_mbim)
 

src/mm-bearer-mbim.c

@@ -1340,9 +1340,6 @@ load_settings_from_bearer (MMBearerMbim        *self,
     if (!g_strcmp0 (data_port_driver, "mhi_net"))
         multiplex_supported = FALSE;
 
-    if (mm_kernel_device_get_wwandev_sysfs_path (mm_port_peek_kernel_device (ctx->data)))
-        multiplex_supported = FALSE;
-
     /* If no multiplex setting given by the user, assume none */
     multiplex = mm_bearer_properties_get_multiplex (properties);
     if (multiplex == MM_BEARER_MULTIPLEX_SUPPORT_UNKNOWN) {

src/mm-device.c

@@ -234,6 +234,27 @@ mm_device_grab_port (MMDevice       *self,
                         error->message);
         return;
     }
+    if (!g_strcmp0 ("net", mm_kernel_device_get_subsystem (kernel_port)) &&
+        mm_kernel_device_get_wwandev_sysfs_path (kernel_port)) {
+        /* This is a wwan netdevice, possibly a multiplexed one.
+         * Multiplexed wwan netdevices do not have a lower device, so they won't fall in the
+         * previous check verified for virtual ports, but require the same management.
+         * However, we need to make sure that the arrived netdevice is not the default one that
+         * instead requires the standard flow: for doing this we check that the name of the
+         * arrived netdevice is not the default one, found in the wwandev_sysfs_path */
+        if (!g_strstr_len (mm_kernel_device_get_wwandev_sysfs_path (kernel_port),
+                           -1,
+                           mm_kernel_device_get_name (kernel_port))) {
+            g_autoptr(GError) error = NULL;
+
+            mm_obj_dbg (self, "grabbing wwan multiplexed device %s", mm_kernel_device_get_name (kernel_port));
+            if (self->priv->modem && !mm_base_modem_grab_link_port (self->priv->modem, kernel_port, &error))
+                mm_obj_dbg (self, "fully ignoring link port %s from now on: %s",
+                            mm_kernel_device_get_name (kernel_port),
+                            error->message);
+            return;
+        }
+    }
 
     /* Get the vendor/product IDs out of the first one that gives us
      * some valid value (it seems we may get NULL reported for VID in QMI