modem-helpers-qmi: better handle no supported modes

Dell Snapdragon X62 before FCC Unlock reports no radio interfaces
from QMI and no device capabilities from MBIM. Instead of asserting
in mm_filter_supported_modes() when called from
mm_supported_modes_from_qmi_supported_modes_context() gracefully
handle the lack of supported modes.

Signed-off-by: Dan Williams <dan@ioncontrol.co>

1 files changed, 11 insertions, 2 deletions

diff --git a/src/mm-modem-helpers-qmi.c b/src/mm-modem-helpers-qmi.c
index bc0be400..7a87454b 100644
--- a/src/mm-modem-helpers-qmi.c
+++ b/src/mm-modem-helpers-qmi.c
@@ -2541,13 +2541,22 @@ mm_supported_capabilities_from_qmi_supported_capabilities_context (MMQmiSupporte
 /* Utility to build list of supported modes */
 
 GArray *
-mm_supported_modes_from_qmi_supported_modes_context (MMQmiSupportedModesContext *ctx,
-                                                     gpointer                    log_object)
+mm_supported_modes_from_qmi_supported_modes_context (MMQmiSupportedModesContext  *ctx,
+                                                     gpointer                     log_object,
+                                                     GError                     **error)
 {
     g_autoptr(GArray)       combinations = NULL;
     g_autoptr(GArray)       all = NULL;
     MMModemModeCombination  mode;
 
+    if (ctx->all == MM_MODEM_MODE_NONE) {
+        g_set_error (error,
+                     MM_CORE_ERROR,
+                     MM_CORE_ERROR_FAILED,
+                     "No supported modes reported");
+        return NULL;
+    }
+
     /* Start with a mode including ALL */
     mode.allowed = ctx->all;
     mode.preferred = MM_MODEM_MODE_NONE;