3 files changed, 10 insertions, 2 deletions
diff --git a/LUFA/DoxygenPages/ChangeLog.txt b/LUFA/DoxygenPages/ChangeLog.txt
index 271c23d10..e92f026cf 100644
--- a/LUFA/DoxygenPages/ChangeLog.txt
+++ b/LUFA/DoxygenPages/ChangeLog.txt
@@ -34,6 +34,8 @@
   *  - Library Applications:
   *   - Fixed broken RESET_TOGGLES_LIBUSB_COMPAT compile time option in the AVRISP-MKII project
   *   - Fixed incompatibility in the CDC class bootloader on some systems (thanks to Sylvain Munaut)
+  *   - Fixed lengthy timeouts in the USBtoSerial project if no application on the host is consuming data (thanks to Nicolas Saugnier)
+  *   - Fixed lengthy automatic data flushing in the CDC and MIDI device class drivers
   *
   *  \section Sec_ChangeLog120730 Version 120730
   *  <b>New:</b>
diff --git a/LUFA/Drivers/USB/Class/Device/CDCClassDevice.c b/LUFA/Drivers/USB/Class/Device/CDCClassDevice.c
index ff0f9bb55..61f4be9d7 100644
--- a/LUFA/Drivers/USB/Class/Device/CDCClassDevice.c
+++ b/LUFA/Drivers/USB/Class/Device/CDCClassDevice.c
@@ -138,7 +138,10 @@ void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 	  return;
 
 	#if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
-	CDC_Device_Flush(CDCInterfaceInfo);
+	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpoint.Address);
+	
+	if (Endpoint_IsINReady())
+	  CDC_Device_Flush(CDCInterfaceInfo);
 	#endif
 }
 
diff --git a/LUFA/Drivers/USB/Class/Device/MIDIClassDevice.c b/LUFA/Drivers/USB/Class/Device/MIDIClassDevice.c
index c9553a413..5defa142a 100644
--- a/LUFA/Drivers/USB/Class/Device/MIDIClassDevice.c
+++ b/LUFA/Drivers/USB/Class/Device/MIDIClassDevice.c
@@ -59,7 +59,10 @@ void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
 	  return;
 
 	#if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
-	MIDI_Device_Flush(MIDIInterfaceInfo);
+	Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpoint.Address);
+	
+	if (Endpoint_IsINReady())
+	  MIDI_Device_Flush(MIDIInterfaceInfo);
 	#endif
 }