Cache the USB_DeviceState variable internally in the library core when multiple check...

[pub/lufa.git] / LUFA / Drivers / USB / LowLevel / Endpoint.c

diff --git a/LUFA/Drivers/USB/LowLevel/Endpoint.c b/LUFA/Drivers/USB/LowLevel/Endpoint.c
index fc54e11..fc2bff1 100644 (file)
--- a/LUFA/Drivers/USB/LowLevel/Endpoint.c
+++ b/LUFA/Drivers/USB/LowLevel/Endpoint.c
@@ -115,10 +115,12 @@ uint8_t Endpoint_WaitUntilReady(void)
                          return ENDPOINT_READYWAIT_NoError;
                }
                
-               if (USB_DeviceState == DEVICE_STATE_Unattached)
+               uint8_t USB_DeviceState_LCL = USB_DeviceState;
+
+               if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
                  return ENDPOINT_READYWAIT_DeviceDisconnected;
-               else if (USB_DeviceState == DEVICE_STATE_Suspended)
-                 return ENDPOINT_READYWAIT_BusSuspended;
+               else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
+                 return ENDPOINT_READYWAIT_BusSuspended;               
                else if (Endpoint_IsStalled())
                  return ENDPOINT_READYWAIT_EndpointStalled;