Nordic BLE: Fix stack event size

Read By group type response can return 4 descriptor discovered when the remote server have 4 descriptors with a 16 bit UUID. The handle, UUID pair get stored in a ble_gattc_desc_t that is 20 bytes long.

This PR increase buffer size to handle this use case.

Author: pan-

targets/TARGET_NORDIC/TARGET_NRF5/TARGET_SDK11/softdevice/common/softdevice_handler/ble_stack_handler_types.h

@@ -1,28 +1,28 @@
-/* 
+/*
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  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
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- *   1. Redistributions of source code must retain the above copyright notice, this list 
+ *
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- *      integrated circuit in a product or a software update for such product, must reproduce 
- *      the above copyright notice, this list of conditions and the following disclaimer in 
+ *   2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA
+ *      integrated circuit in a product or a software update for such product, must reproduce
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  *      the documentation and/or other materials provided with the distribution.
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- *   3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be 
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+ *      used to endorse or promote products derived from this software without specific prior
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+ *   4. This software, with or without modification, must only be used with a
  *      Nordic Semiconductor ASA integrated circuit.
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- *   5. Any software provided in binary or object form under this license must not be reverse 
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+ *   5. Any software provided in binary or object form under this license must not be reverse
+ *      engineered, decompiled, modified and/or disassembled.
+ *
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@@ -33,7 +33,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  */
 
 
@@ -57,7 +57,7 @@
 #include "app_error.h"
 #include "app_util.h"
 
-#define BLE_STACK_EVT_MSG_BUF_SIZE       (sizeof(ble_evt_t) + (GATT_MTU_SIZE_DEFAULT))     /**< Size of BLE event message buffer. This will be provided to the SoftDevice while fetching an event. */
+#define BLE_STACK_EVT_MSG_BUF_SIZE       (sizeof(ble_evt_t) + (3 * sizeof(ble_gattc_attr_info_t)) + (GATT_MTU_SIZE_DEFAULT))     /**< Size of BLE event message buffer. This will be provided to the SoftDevice while fetching an event. */
 #define BLE_STACK_HANDLER_SCHED_EVT_SIZE 0                                                 /**< The size of the scheduler event used by SoftDevice handler when passing BLE events using the @ref app_scheduler. */
 
 /**@brief Application stack event handler type. */