iface-modem-messaging: if only one storage supported, select it right away

Some plugins or implementations (e.g. notably MBIM) may report a
single storage as supported and no way to update the current default
storage. In this specific case, we will initialize the default storage
to that single one supported right away, regardless of whether
selecting others is implemented or not.

1 files changed, 42 insertions, 18 deletions

diff --git a/src/mm-iface-modem-messaging.c b/src/mm-iface-modem-messaging.c
index 70512904a..8b3ac8c13 100644
--- a/src/mm-iface-modem-messaging.c
+++ b/src/mm-iface-modem-messaging.c
@@ -896,6 +896,27 @@ get_best_initial_default_sms_storage (MMIfaceModemMessaging *self)
     return default_storages_preference[i];
 }
 
+static MMSmsStorage
+get_single_default_sms_storage (MMIfaceModemMessaging *self)
+{
+    StorageContext *storage_ctx;
+
+    storage_ctx = get_storage_context (self);
+
+    /* If there is one single storage supported for storing and receiving, just
+     * use that one. */
+    if (storage_ctx->supported_mem2 && storage_ctx->supported_mem2->len == 1 &&
+        storage_ctx->supported_mem3 && storage_ctx->supported_mem3->len == 1) {
+        MMSmsStorage storing_default;
+
+        storing_default = g_array_index (storage_ctx->supported_mem2, MMSmsStorage, 0);
+        if (storing_default == g_array_index (storage_ctx->supported_mem3, MMSmsStorage, 0))
+            return storing_default;
+    }
+
+    return MM_SMS_STORAGE_UNKNOWN;
+}
+
 static void
 interface_enabling_step (GTask *task)
 {
@@ -949,32 +970,35 @@ interface_enabling_step (GTask *task)
         /* Fall down to next step */
         ctx->step++;
 
-    case ENABLING_STEP_STORAGE_DEFAULTS:
-        /* Set storage defaults */
-        if (MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage &&
-            MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage_finish) {
-            MMSmsStorage default_storage;
+    case ENABLING_STEP_STORAGE_DEFAULTS: {
+        MMSmsStorage default_storage;
 
+        /* Is there only one single storage supported? if so, we don't care if
+         * setting default storage is implemented or not. */
+        default_storage = get_single_default_sms_storage (self);
+        if (default_storage == MM_SMS_STORAGE_UNKNOWN)
             default_storage = get_best_initial_default_sms_storage (self);
 
-            /* Already bound to the 'default-storage' property in the skeleton */
-            g_object_set (self,
-                          MM_IFACE_MODEM_MESSAGING_SMS_DEFAULT_STORAGE, default_storage,
-                          NULL);
-
-            if (default_storage != MM_SMS_STORAGE_UNKNOWN) {
-                MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage (
-                    self,
-                    default_storage,
-                    (GAsyncReadyCallback)set_default_storage_ready,
-                    task);
-                return;
-            }
+        /* Already bound to the 'default-storage' property in the skeleton */
+        g_object_set (self,
+                      MM_IFACE_MODEM_MESSAGING_SMS_DEFAULT_STORAGE, default_storage,
+                      NULL);
 
+        if (default_storage == MM_SMS_STORAGE_UNKNOWN)
             mm_info ("Cannot set default storage, none of the suggested ones supported");
+        else if (MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage &&
+                 MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage_finish) {
+            MM_IFACE_MODEM_MESSAGING_GET_INTERFACE (self)->set_default_storage (
+                self,
+                default_storage,
+                (GAsyncReadyCallback)set_default_storage_ready,
+                task);
+            return;
         }
+
         /* Fall down to next step */
         ctx->step++;
+    }
 
     case ENABLING_STEP_LOAD_INITIAL_SMS_PARTS:
         /* Allow loading the initial list of SMS parts */