diff options
-rw-r--r-- | block/blk-mq-tag.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 6c78c08865e3..a81b138e89fe 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c | |||
@@ -236,7 +236,11 @@ static void bt_clear_tag(struct blk_mq_bitmap_tags *bt, unsigned int tag) | |||
236 | const int index = TAG_TO_INDEX(bt, tag); | 236 | const int index = TAG_TO_INDEX(bt, tag); |
237 | struct bt_wait_state *bs; | 237 | struct bt_wait_state *bs; |
238 | 238 | ||
239 | clear_bit(TAG_TO_BIT(bt, tag), &bt->map[index].word); | 239 | /* |
240 | * The unlock memory barrier need to order access to req in free | ||
241 | * path and clearing tag bit | ||
242 | */ | ||
243 | clear_bit_unlock(TAG_TO_BIT(bt, tag), &bt->map[index].word); | ||
240 | 244 | ||
241 | bs = bt_wake_ptr(bt); | 245 | bs = bt_wake_ptr(bt); |
242 | if (bs && atomic_dec_and_test(&bs->wait_cnt)) { | 246 | if (bs && atomic_dec_and_test(&bs->wait_cnt)) { |