Make +CMEE optional for CDMA modems.

It's mandatory by spec, so it really shouldn't be optional. Need to figure
out which CDMA modems have problems with it and implement plugin for them.

src/mm-generic-cdma.c

@@ -31,6 +31,21 @@ mm_generic_cdma_new (const char *serial_device, const char *driver)
 
 /*****************************************************************************/
 
+static void
+enable_error_reporting_done (MMSerial *serial,
+                             GString *response,
+                             GError *error,
+                             gpointer user_data)
+{
+    MMCallbackInfo *info = (MMCallbackInfo *) user_data;
+
+    if (error)
+        g_warning ("Your CDMA modem does not support +CMEE command");
+
+    /* Ignore errors, see FIXME in init_done() */
+    mm_callback_info_schedule (info);
+}
+
 static void
 init_done (MMSerial *serial,
            GString *response,
@@ -39,16 +54,23 @@ init_done (MMSerial *serial,
 {
     MMCallbackInfo *info = (MMCallbackInfo *) user_data;
 
-    if (error)
+    if (error) {
         info->error = g_error_copy (error);
-
+        mm_callback_info_schedule (info);
-    mm_callback_info_schedule (info);
+    } else {
+        /* Try to enable better error reporting. My experience so far indicates
+           there's some CDMA modems that does not support that.
+        FIXME: It's mandatory by spec, so it really shouldn't be optional. Figure
+        out which CDMA modems have problems with it and implement plugin for them.
+        */
+        mm_serial_queue_command (serial, "+CMEE=1", 3, enable_error_reporting_done, user_data);
+    }
 }
 
 static void
 flash_done (MMSerial *serial, gpointer user_data)
 {
-    mm_serial_queue_command (serial, "Z E0 V1 X4 &C1 +CMEE=1", 3, init_done, user_data);
+    mm_serial_queue_command (serial, "Z E0 V1 X4 &C1", 3, init_done, user_data);
 }
 
 static void