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-rw-r--r--block/cfq-iosched.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 0d3b70d..0eb4aff 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1908,7 +1908,9 @@ cfq_update_io_seektime(struct cfq_data *cfqd, struct cfq_io_context *cic,
sector_t sdist;
u64 total;
- if (cic->last_request_pos < rq->sector)
+ if (!cic->last_request_pos)
+ sdist = 0;
+ else if (cic->last_request_pos < rq->sector)
sdist = rq->sector - cic->last_request_pos;
else
sdist = cic->last_request_pos - rq->sector;