acpi-thermal: fix mod_timer() interval

Use relative time, not absolute.  Discovered by Jung-Ik (John) Lee
<jilee@google.com>.

Cc: Jung-Ik (John) Lee <jilee@google.com>
Acked-by: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 0ae8b93..589b98b 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -758,7 +758,8 @@
 			del_timer(&(tz->timer));
 	} else {
 		if (timer_pending(&(tz->timer)))
-			mod_timer(&(tz->timer), (HZ * sleep_time) / 1000);
+			mod_timer(&(tz->timer),
+					jiffies + (HZ * sleep_time) / 1000);
 		else {
 			tz->timer.data = (unsigned long)tz;
 			tz->timer.function = acpi_thermal_run;