[QPG] Update BLE State machine to not try starting advertisement whil…

…e previous start was still in progress (#20219)

Case existed where 2 paths restarted advertising on a FailSafe timeout.
Protection added by adding additional state.

src/platform/qpg/BLEManagerImpl.cpp

@@ -254,7 +254,7 @@ void BLEManagerImpl::_OnPlatformEvent(const ChipDeviceEvent * event)
  // Force the advertising state to be refreshed to reflect new provisioning state.
  mFlags.Set(Flags::kAdvertisingRefreshNeeded);
 
- DriveBLEState();
+ PlatformMgr().ScheduleWork(DriveBLEState, 0);
 
  break;
 
@@ -519,7 +519,7 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
  uint16_t intervalMax;
 
  // If already advertising, stop it, before changing values
- if (mFlags.Has(Flags::kAdvertising))
+ if (mFlags.Has(Flags::kAdvertising) || mFlags.Has(Flags::kEnablingAdvertising))
  {
  err = MapBLEError(qvCHIP_BleStopAdvertising());
  SuccessOrExit(err);
@@ -550,7 +550,9 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
  err = MapBLEError(qvCHIP_BleStartAdvertising());
  SuccessOrExit(err);
 
- mFlags.Set(Flags::kAdvertising);
+ // Flag updated asynchronously by BLE host callback
+ mFlags.Set(Flags::kEnablingAdvertising);
+
  if (mFlags.Has(Flags::kFastAdvertisingEnabled))
  {
  StartBleAdvTimeoutTimer(CHIP_DEVICE_CONFIG_BLE_ADVERTISING_INTERVAL_CHANGE_TIME);
@@ -715,6 +717,7 @@ void BLEManagerImpl::HandleDmMsg(qvCHIP_Ble_DmEvt_t * pDmEvt)
  }
 
  sInstance.mFlags.Clear(Flags::kAdvertisingRefreshNeeded);
+ sInstance.mFlags.Clear(Flags::kEnablingAdvertising);
 
  // Transition to the Advertising state...
  if (!sInstance.mFlags.Has(Flags::kAdvertising))
@@ -739,6 +742,7 @@ void BLEManagerImpl::HandleDmMsg(qvCHIP_Ble_DmEvt_t * pDmEvt)
  ChipLogError(DeviceLayer, "QVCHIP_DM_ADV_STOP_IND error: %d", (int) pDmEvt->advSetStop.status);
  return;
  }
+
  if (mFlags.Has(Flags::kRestartAdvertising))
  {
  BLEMgr().SetAdvertisingMode(BLEAdvertisingMode::kSlowAdvertising);
@@ -932,7 +936,7 @@ void BLEManagerImpl::BleAdvTimeoutHandler(TimerHandle_t xTimer)
  if (BLEMgrImpl().mFlags.Has(Flags::kFastAdvertisingEnabled))
  {
  /* Stop advertising and defer restart for when stop confirmation is received from the stack */
- ChipLogDetail(DeviceLayer, "bleAdv Timeout : Start slow advertissment");
+ ChipLogDetail(DeviceLayer, "bleAdv Timeout : Start slow advertisement");
  sInstance.mFlags.Set(Flags::kRestartAdvertising);
  sInstance.StopAdvertising();
  }

src/platform/qpg/BLEManagerImpl.h

@@ -99,6 +99,7 @@ class BLEManagerImpl final : public BLEManager, private BleLayer, private BlePla
  kDeviceNameSet = 0x0020, /**< The device name has been set. */
  kRestartAdvertising = 0x0040, /**< The advertising will be restarted when stop advertising confirmation is received and this
  flag is set*/
+ kEnablingAdvertising = 0x0080, /**< The BLE controller is setting up Advertisements. */
  };
 
  enum