example: Scan failure should not cause system crash

examples/bluetooth/bluedroid/ble/blufi/main/blufi_example_main.c

@@ -371,7 +371,7 @@ static void example_event_callback(esp_blufi_cb_event_t event, esp_blufi_cb_para
             .channel = 0,
             .show_hidden = false
         };
-        ESP_ERROR_CHECK(esp_wifi_scan_start(&scanConf, true));
+        esp_wifi_scan_start(&scanConf, true);
         break;
     }
     case ESP_BLUFI_EVENT_RECV_CUSTOM_DATA:

examples/bluetooth/esp_ble_mesh/ble_mesh_wifi_coexist/components/iperf/cmd_wifi.c

@@ -194,7 +194,7 @@ static bool wifi_cmd_sta_scan(const char *ssid)
     scan_config.ssid = (uint8_t *) ssid;
 
     ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
-    ESP_ERROR_CHECK( esp_wifi_scan_start(&scan_config, false) );
+    esp_wifi_scan_start(&scan_config, false);
 
     return true;
 }

examples/mesh/manual_networking/main/mesh_main.c

@@ -152,7 +152,7 @@ void mesh_scan_done_handler(int num)
         esp_wifi_scan_stop();
         scan_config.show_hidden = 1;
         scan_config.scan_type = WIFI_SCAN_TYPE_PASSIVE;
-        ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, 0));
+        esp_wifi_scan_start(&scan_config, 0);
     }
 }
 
@@ -173,7 +173,7 @@ void mesh_event_handler(void *arg, esp_event_base_t event_base,
         /* mesh softAP is hidden */
         scan_config.show_hidden = 1;
         scan_config.scan_type = WIFI_SCAN_TYPE_PASSIVE;
-        ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, 0));
+        esp_wifi_scan_start(&scan_config, 0);
     }
     break;
     case MESH_EVENT_STOPPED: {
@@ -244,7 +244,7 @@ void mesh_event_handler(void *arg, esp_event_base_t event_base,
             esp_wifi_scan_stop();
             scan_config.show_hidden = 1;
             scan_config.scan_type = WIFI_SCAN_TYPE_PASSIVE;
-            ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, 0));
+            esp_wifi_scan_start(&scan_config, 0);
         }
     }
     break;

examples/wifi/iperf/main/cmd_wifi.c

@@ -174,7 +174,7 @@ static bool wifi_cmd_sta_scan(const char* ssid)
     scan_config.ssid = (uint8_t *) ssid;
 
     ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
-    ESP_ERROR_CHECK( esp_wifi_scan_start(&scan_config, false) );
+    esp_wifi_scan_start(&scan_config, false);
 
     return true;
 }

examples/wifi/scan/main/scan.c

@@ -124,7 +124,7 @@ static void wifi_scan(void)
 
     ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
     ESP_ERROR_CHECK(esp_wifi_start());
-    ESP_ERROR_CHECK(esp_wifi_scan_start(NULL, true));
+    esp_wifi_scan_start(NULL, true);
     ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&number, ap_info));
     ESP_ERROR_CHECK(esp_wifi_scan_get_ap_num(&ap_count));
     ESP_LOGI(TAG, "Total APs scanned = %u", ap_count);
@@ -137,7 +137,6 @@ static void wifi_scan(void)
         }
         ESP_LOGI(TAG, "Channel \t\t%d\n", ap_info[i].primary);
     }
-
 }
 
 void app_main(void)