Index: linux-3.18.16/arch/mips/ralink/cevt-rt3352.c
===================================================================
--- linux-3.18.16.orig/arch/mips/ralink/cevt-rt3352.c	2015-06-14 09:10:18.544132719 +0200
+++ linux-3.18.16/arch/mips/ralink/cevt-rt3352.c	2015-06-18 13:30:04.830117077 +0200
@@ -53,8 +53,7 @@
 
 	sdev = container_of(evt, struct systick_device, dev);
 	count = ioread32(sdev->membase + SYSTICK_COUNT);
-	count = (count + delta) % SYSTICK_FREQ;
-	iowrite32(count, sdev->membase + SYSTICK_COMPARE);
+	iowrite32(count + delta, sdev->membase + SYSTICK_COMPARE);
 
 	return 0;
 }