diff -r 741dcdf88ba9 -r c4d65d91ad0c kernel/eka/drivers/usbcsc/d_usbcsc.cpp
--- a/kernel/eka/drivers/usbcsc/d_usbcsc.cpp	Mon Mar 08 11:57:08 2010 +0000
+++ b/kernel/eka/drivers/usbcsc/d_usbcsc.cpp	Sun Mar 14 13:15:32 2010 +0000
@@ -1208,6 +1208,7 @@
 	__KTRACE_OPT(KUSB, Kern::Printf("DLddUsbcScChannel::~DLddUsbcScChannel()"));
 	if (iController)
 		{
+		iController->DeRegisterClient(this);
 		iStatusCallbackInfo.Cancel();
 		iEndpointStatusCallbackInfo.Cancel();
 	    iOtgFeatureCallbackInfo.Cancel();
@@ -1218,7 +1219,6 @@
 			iController->ReleaseDeviceControl(this);
 			iOwnsDeviceControl = EFalse;
 			}
-		iController->DeRegisterClient(this);
 		iController=NULL;
 		DestroyEp0();
 		if (iStatusFifo!=NULL)