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-rw-r--r--block/bfq-iosched.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index a72304c728fc..b111a7b8dca6 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -386,6 +386,12 @@ static void bfq_put_stable_ref(struct bfq_queue *bfqq);
void bic_set_bfqq(struct bfq_io_cq *bic, struct bfq_queue *bfqq, bool is_sync)
{
+ struct bfq_queue *old_bfqq = bic->bfqq[is_sync];
+
+ /* Clear bic pointer if bfqq is detached from this bic */
+ if (old_bfqq && old_bfqq->bic == bic)
+ old_bfqq->bic = NULL;
+
/*
* If bfqq != NULL, then a non-stable queue merge between
* bic->bfqq and bfqq is happening here. This causes troubles
@@ -5311,7 +5317,6 @@ static void bfq_exit_icq_bfqq(struct bfq_io_cq *bic, bool is_sync)
unsigned long flags;
spin_lock_irqsave(&bfqd->lock, flags);
- bfqq->bic = NULL;
bfq_exit_bfqq(bfqd, bfqq);
bic_set_bfqq(bic, NULL, is_sync);
spin_unlock_irqrestore(&bfqd->lock, flags);