Be doubly-certain that the incomming CDC class driver's endpoint/pipe is flushed...

[pub/USBasp.git] / LUFA / Drivers / USB / Class / Host / CDC.c

diff --git a/LUFA/Drivers/USB/Class/Host/CDC.c b/LUFA/Drivers/USB/Class/Host/CDC.c
index 8ad37de..85864b0 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/CDC.c
+++ b/LUFA/Drivers/USB/Class/Host/CDC.c
@@ -309,13 +309,22 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
        Pipe_SetPipeToken(PIPE_TOKEN_IN);\r
        Pipe_Unfreeze();\r
 \r
-       if (Pipe_IsINReceived() && !(Pipe_BytesInPipe()))\r
-         Pipe_ClearIN();\r
-       \r
-       BytesInPipe = Pipe_BytesInPipe();\r
-       Pipe_Freeze();\r
-       \r
-       return BytesInPipe;\r
+       if (Pipe_IsINReceived())\r
+       {\r
+               if (!(Pipe_BytesInPipe()))\r
+                 Pipe_ClearIN();\r
+               \r
+               BytesInPipe = Pipe_BytesInPipe();\r
+               Pipe_Freeze();\r
+               \r
+               return BytesInPipe;\r
+       }\r
+       else\r
+       {\r
+               Pipe_Freeze();\r
+               \r
+               return 0;\r
+       }\r
 }\r
 \r
 uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)\r