[PKT_SCHED]: Fix range in psched_tod_diff() to 0..bound

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 87496e3aa330..7352e455053c 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -140,7 +140,7 @@ psched_tod_diff(int delta_sec, int bound)
         if (bound <= 1000000 || delta_sec > (0x7FFFFFFF/1000000)-1)
                 return bound;
         delta = delta_sec * 1000000;
-        if (delta > bound)
+        if (delta > bound || delta < 0)
                 delta = bound;
         return delta;
 }
@@ -156,7 +156,8 @@ psched_tod_diff(int delta_sec, int bound)
                    __delta += 1000000; \
            case 1: \
                    __delta += 1000000; \
-           case 0: ; \
+           case 0: \
+                   __delta = abs(__delta); \
            } \
            __delta; \
 })