Fix nasty bug in USBInterrupt.c which would cause a lockup if the control endpoint was not selected at the point the USB endpoint interrupt fires when INTERRUPT_CONTROL_ENDPOINT is defined.

Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c

@@ -183,8 +183,6 @@ static uint32_t ServiceDiscovery_GetDataElementSize(const void** DataElementHead
 	uint8_t SizeIndex = (*((uint8_t*)*DataElementHeader) & 0x07);
 	*DataElementHeader += sizeof(uint8_t);
 	
-	*ElementHeaderSize = 1;
-	
 	uint32_t ElementValue;
 	
 	switch (SizeIndex)
@@ -205,7 +203,8 @@ static uint32_t ServiceDiscovery_GetDataElementSize(const void** DataElementHead
 			*ElementHeaderSize  = (1 + sizeof(uint32_t));
 			break;
 		default:
-			ElementValue = (1UL << SizeIndex);
+			ElementValue = (1 << SizeIndex);
+			*ElementHeaderSize = 1;
 			break;
 	}
 	

LUFA/Drivers/USB/LowLevel/USBInterrupt.c

@@ -235,13 +235,13 @@ ISR(USB_COM_vect, ISR_BLOCK)
 {
 	uint8_t PrevSelectedEndpoint = Endpoint_GetCurrentEndpoint(); 
 
+	Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
 	USB_INT_Disable(USB_INT_RXSTPI);
 	sei();
-	USB_USBTask();
-	USB_INT_Enable(USB_INT_RXSTPI);
 
-	USB_INT_Clear(USB_INT_RXSTPI);
+	USB_USBTask();
 
+	USB_INT_Enable(USB_INT_RXSTPI);
 	Endpoint_SelectEndpoint(PrevSelectedEndpoint);
 }
 #endif