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authorSascha Hauer <s.hauer@pengutronix.de>2014-09-30 08:27:09 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2014-09-30 10:44:15 +0200
commit8af0569b7bfbc1162f4de7a77a77432de2286055 (patch)
tree62c3e024f09e90818f2a45a8a0f67633a1e182ff /common/clock.c
parent96cae61eba199b9c3f5451f293cf60db2b535164 (diff)
downloadbarebox-8af0569b7bfbc1162f4de7a77a77432de2286055.tar.gz
clock: make get_time_ns() safe to be called without clocksource
make it possible to call get_time_ns() before the clocksource has been registered. Just return 0 in this case which is still better than crashing the system. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/clock.c')
-rw-r--r--common/clock.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/common/clock.c b/common/clock.c
index 2dae9ff..76ce881 100644
--- a/common/clock.c
+++ b/common/clock.c
@@ -44,6 +44,9 @@ uint64_t get_time_ns(void)
uint64_t cycle_now, cycle_delta;
uint64_t ns_offset;
+ if (!cs)
+ return 0;
+
/* read clocksource: */
cycle_now = cs->read() & cs->mask;