1 files changed, 8 insertions, 2 deletions

diff --git a/arch/powerpc/sysdev/mpic_timer.c b/arch/powerpc/sysdev/mpic_timer.c
index 22d7d57eead9..9d9b06217f8b 100644
--- a/arch/powerpc/sysdev/mpic_timer.c
+++ b/arch/powerpc/sysdev/mpic_timer.c
@@ -41,6 +41,7 @@
 #define MPIC_TIMER_TCR_ROVR_OFFSET      24
 
 #define TIMER_STOP                      0x80000000
+#define GTCCR_TOG                       0x80000000
 #define TIMERS_PER_GROUP                4
 #define MAX_TICKS                       (~0U >> 1)
 #define MAX_TICKS_CASCADE               (~0U)
@@ -96,8 +97,11 @@ static void convert_ticks_to_time(struct timer_group_priv *priv,
         time->tv_sec = (__kernel_time_t)div_u64(ticks, priv->timerfreq);
         tmp_sec = (u64)time->tv_sec * (u64)priv->timerfreq;
 
-        time->tv_usec = (__kernel_suseconds_t)
-                div_u64((ticks - tmp_sec) * 1000000, priv->timerfreq);
+        time->tv_usec = 0;
+
+        if (tmp_sec <= ticks)
+                time->tv_usec = (__kernel_suseconds_t)
+                        div_u64((ticks - tmp_sec) * 1000000, priv->timerfreq);
 
         return;
 }
@@ -327,11 +331,13 @@ void mpic_get_remain_time(struct mpic_timer *handle, struct timeval *time)
         casc_priv = priv->timer[handle->num].cascade_handle;
         if (casc_priv) {
                 tmp_ticks = in_be32(&priv->regs[handle->num].gtccr);
+                tmp_ticks &= ~GTCCR_TOG;
                 ticks = ((u64)tmp_ticks & UINT_MAX) * (u64)MAX_TICKS_CASCADE;
                 tmp_ticks = in_be32(&priv->regs[handle->num - 1].gtccr);
                 ticks += tmp_ticks;
         } else {
                 ticks = in_be32(&priv->regs[handle->num].gtccr);
+                ticks &= ~GTCCR_TOG;
         }
 
         convert_ticks_to_time(priv, ticks, time);