PCI/PTM: Save/restore Precision Time Measurement Capability for suspend/resume

[linux-2.6-microblaze.git] / include / linux / time64.h

diff --git a/include/linux/time64.h b/include/linux/time64.h
index c9dcb3e..5117cb5 100644 (file)
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -124,6 +124,10 @@ static inline bool timespec64_valid_settod(const struct timespec64 *ts)
  */
 static inline s64 timespec64_to_ns(const struct timespec64 *ts)
 {
+       /* Prevent multiplication overflow */
+       if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
+               return KTIME_MAX;
+
        return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
 }