sierra: too many timeout errors during custom init means non-AT port

Reduces probing time of the modem in ~10s.

1 files changed, 7 insertions, 0 deletions

diff --git a/plugins/sierra/mm-plugin-sierra.c b/plugins/sierra/mm-plugin-sierra.c
index 0e4eceb0..8712c088 100644
--- a/plugins/sierra/mm-plugin-sierra.c
+++ b/plugins/sierra/mm-plugin-sierra.c
@@ -80,6 +80,13 @@ gcap_ready (MMAtSerialPort *port,
             SierraCustomInitContext *ctx)
 {
     if (error) {
+        /* If consumed all tries and the last error was a timeout, assume the
+         * port is not AT */
+        if (ctx->retries == 0 &&
+            g_error_matches (error, MM_SERIAL_ERROR, MM_SERIAL_ERROR_RESPONSE_TIMEOUT)) {
+            mm_port_probe_set_result_at (ctx->probe, FALSE);
+        }
+
         /* Just retry... */
         sierra_custom_init_step (ctx);
         return;