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-rw-r--r--block/blk-stat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-stat.c b/block/blk-stat.c
index da9407b7d..41be89eca 100644
--- a/block/blk-stat.c
+++ b/block/blk-stat.c
@@ -28,7 +28,7 @@ void blk_rq_stat_init(struct blk_rq_stat *stat)
/* src is a per-cpu stat, mean isn't initialized */
void blk_rq_stat_sum(struct blk_rq_stat *dst, struct blk_rq_stat *src)
{
- if (!src->nr_samples)
+ if (dst->nr_samples + src->nr_samples <= dst->nr_samples)
return;
dst->min = min(dst->min, src->min);