Merge branch 'fix/uninited_local_var_in_nimble_example' into 'master'

fix(ble): init return code in nimble example

Closes BLERP-2233

See merge request espressif/esp-idf!41783

Author: Isl2017

examples/bluetooth/ble_get_started/nimble/NimBLE_GATT_Server/main/main.c

@@ -80,7 +80,7 @@ static void heart_rate_task(void *param) {
 
 void app_main(void) {
     /* Local variables */
-    int rc;
+    int rc = 0;
     esp_err_t ret;
 
     /* LED initialization */

examples/bluetooth/ble_get_started/nimble/NimBLE_GATT_Server/main/src/gatt_svc.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -72,7 +72,7 @@ static const struct ble_gatt_svc_def gatt_svr_svcs[] = {
 static int heart_rate_chr_access(uint16_t conn_handle, uint16_t attr_handle,
                                  struct ble_gatt_access_ctxt *ctxt, void *arg) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* Handle access events */
     /* Note: Heart rate characteristic is read only */
@@ -115,7 +115,7 @@ static int heart_rate_chr_access(uint16_t conn_handle, uint16_t attr_handle,
 static int led_chr_access(uint16_t conn_handle, uint16_t attr_handle,
                           struct ble_gatt_access_ctxt *ctxt, void *arg) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* Handle access events */
     /* Note: LED characteristic is write only */
@@ -248,7 +248,7 @@ void gatt_svr_subscribe_cb(struct ble_gap_event *event) {
  */
 int gatt_svc_init(void) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* 1. GATT service initialization */
     ble_svc_gatt_init();

examples/bluetooth/ble_get_started/nimble/NimBLE_Security/main/main.c

@@ -85,7 +85,7 @@ static void heart_rate_task(void *param) {
 
 void app_main(void) {
     /* Local variables */
-    int rc;
+    int rc = 0;
     uint32_t seed = esp_random();
     esp_err_t ret;
 

examples/bluetooth/ble_get_started/nimble/NimBLE_Security/main/src/gatt_svc.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -75,7 +75,7 @@ static const struct ble_gatt_svc_def gatt_svr_svcs[] = {
 static int heart_rate_chr_access(uint16_t conn_handle, uint16_t attr_handle,
                                  struct ble_gatt_access_ctxt *ctxt, void *arg) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* Handle access events */
     /* Note: Heart rate characteristic is read only */
@@ -118,7 +118,7 @@ static int heart_rate_chr_access(uint16_t conn_handle, uint16_t attr_handle,
 static int led_chr_access(uint16_t conn_handle, uint16_t attr_handle,
                           struct ble_gatt_access_ctxt *ctxt, void *arg) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* Handle access events */
     /* Note: LED characteristic is write only */
@@ -256,7 +256,7 @@ int gatt_svr_subscribe_cb(struct ble_gap_event *event) {
  */
 int gatt_svc_init(void) {
     /* Local variables */
-    int rc;
+    int rc = 0;
 
     /* 1. GATT service initialization */
     ble_svc_gatt_init();