bsp/mpc55xx: Avoid integer overflow

2013-07-02 15:14:51 +02:00
parent c97d3dd42b
commit d91d50f638
1 changed files with 2 additions and 2 deletions
--- a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/get-system-clock.c
+++ b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/get-system-clock.c
@@ -63,8 +63,8 @@ uint32_t mpc55xx_get_system_clock(void)
      uint32_t emfd = esyncr1.B.EMFD;
      uint32_t erfd = esyncr2.B.ERFD;

-      system_clock = (reference_clock * (emfd + 16))
-        / ((erfd + 1) * (eprediv + 1));
+      system_clock = ((reference_clock / (eprediv + 1)) * (emfd + 16))
+        / (erfd + 1);
    } else {
      system_clock = reference_clock;
    }