lib: lte_link_control: Skip parsing of unexpected %NCELLMEAS notifica…

…tions

Added check to skip %NCELLMEAS notification parsing when neighbor
cell measurement has not been requested by calling
lte_lc_neighbor_cell_measurement(). If the neighbor cell measurement
is triggered by sending the AT%NCELLMEAS AT command to the modem,
LTE LC does not know how the received notification should be parsed,
sometimes leading to a parsing error.

Signed-off-by: Tommi Kangas <tommi.kangas@nordicsemi.no>

lib/lte_link_control/modules/ncellmeas.c

@@ -667,6 +667,13 @@ static void at_handler_ncellmeas(const char *response)
 		goto exit;
 	}
 
+	if (k_sem_count_get(&ncellmeas_idle_sem) > 0) {
+		/* No need to parse the notification because neighbor cell measurement
+		 * has not been requested.
+		 */
+		goto exit;
+	}
+
 	if (ncellmeas_params.search_type > LTE_LC_NEIGHBOR_SEARCH_TYPE_EXTENDED_COMPLETE) {
 		at_handler_ncellmeas_gci(response);
 		goto exit;