Notify the finisher thread after canceling transfers. It was possible that freeing the allocated

transfer resources would be delayed unnecessarily until some other transfer completed and woke up
the finisher thread. Found by Salvatore Benedetto, thanks!

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23713 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/busses/usb/ehci.cpp

@@ -906,6 +906,9 @@ EHCI::CancelQueuedTransfers(Pipe *pipe, bool force)
 	}
 
 	Unlock();
+
+	// notify the finisher so it can clean up the canceled transfers
+	release_sem_etc(fFinishTransfersSem, 1, B_DO_NOT_RESCHEDULE);
 	return B_OK;
 }