[PATCH 2/9] bfq-iosched: don't worry about reserved tags in limit_depth

[Jens Axboe]

Reserved tags are used for error handling, we don't need to
care about them for regular IO. The core won't call us for these
anyway.

Acked-by: Paolo Valente <paolo.vale...@linaro.org>
Signed-off-by: Jens Axboe <ax...@kernel.dk>
---
 block/bfq-iosched.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index eefd8a4bc936..db38e88a5670 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -542,14 +542,7 @@ static void bfq_limit_depth(unsigned int op, struct 
blk_mq_alloc_data *data)
        if (op_is_sync(op) && !op_is_write(op))
                return;
 
-       if (data->flags & BLK_MQ_REQ_RESERVED) {
-               if (unlikely(!tags->nr_reserved_tags)) {
-                       WARN_ON_ONCE(1);
-                       return;
-               }
-               bt = &tags->breserved_tags;
-       } else
-               bt = &tags->bitmap_tags;
+       bt = &tags->bitmap_tags;
 
        if (unlikely(bfqd->sb_shift != bt->sb.shift))
                bfq_update_depths(bfqd, bt);
-- 
2.7.4