Fixing usb.c countTx race; thanks, geoffreymbrown!

leaflabs · Feb 9, 2011 · d0074d2 · d0074d2
1 parent 90058cf
commit d0074d2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libmaple/usb/usb.c b/libmaple/usb/usb.c
@@ -376,8 +376,8 @@ uint16 usbSendBytes(uint8* sendBuf, uint16 len) {
   if (loaded) {
     UserToPMABufferCopy(sendBuf,VCOM_TX_ADDR + countTx, loaded);
     _SetEPTxCount(VCOM_TX_ENDP, countTx+loaded);
-    _SetEPTxValid(VCOM_TX_ENDP);
     countTx += loaded;
+    _SetEPTxValid(VCOM_TX_ENDP);
   }
 
   return loaded;