block/mq-deadline: Remove the redundant rb_entry_rq in the deadline_from_pos().

In commit(fde02699c242), the "if (blk_rq_is_seq_zoned_write(rq))"
was removed, but the "rb_entry_rq(node)" and some other code were
inadvertently left behind. This patch fixed it.

Signed-off-by: chengkaitao <chengkaitao@kylinos.cn>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Li Nan <linan122@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 2e689b2c40213a6815f421c0f4109cd0358e4209..3e741d33142d3af674c484ac3e60ba98fe15196a 100644 (file)
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -136,10 +136,6 @@ static inline struct request *deadline_from_pos(struct dd_per_prio *per_prio,
        struct rb_node *node = per_prio->sort_list[data_dir].rb_node;
        struct request *rq, *res = NULL;
 
-       if (!node)
-               return NULL;
-
-       rq = rb_entry_rq(node);
        while (node) {
                rq = rb_entry_rq(node);
                if (blk_rq_pos(rq) >= pos) {