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-rw-r--r--block/bfq-iosched.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 98a42ddb1760..7bf073ef9443 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2718,7 +2718,13 @@ bfq_setup_cooperator(struct bfq_data *bfqd, struct bfq_queue *bfqq,
* costly and complicated.
*/
if (unlikely(!bfqd->nonrot_with_queueing)) {
- if (bic->stable_merge_bfqq &&
+ /*
+ * Make sure also that bfqq is sync, because
+ * bic->stable_merge_bfqq may point to some queue (for
+ * stable merging) also if bic is associated with a
+ * sync queue, but this bfqq is async
+ */
+ if (bfq_bfqq_sync(bfqq) && bic->stable_merge_bfqq &&
!bfq_bfqq_just_created(bfqq) &&
time_is_before_jiffies(bfqq->split_time +
msecs_to_jiffies(bfq_late_stable_merging)) &&