summaryrefslogtreecommitdiff
path: root/block
diff options
context:
space:
mode:
authorJohn Garry <john.garry@huawei.com>2020-04-16 19:18:51 +0800
committerJens Axboe <axboe@kernel.dk>2020-04-16 09:27:03 -0600
commit5fe56de799ad03e92d794c7936bf363922b571df (patch)
tree68b26c54cee0573e332f5aa2bb077f07189822ac /block
parent8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff)
downloadlinux-sh-5fe56de799ad03e92d794c7936bf363922b571df.tar.gz
blk-mq: Put driver tag in blk_mq_dispatch_rq_list() when no budget
If in blk_mq_dispatch_rq_list() we find no budget, then we break of the dispatch loop, but the request may keep the driver tag, evaulated in 'nxt' in the previous loop iteration. Fix by putting the driver tag for that request. Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 8e56884fd2e9..a7785df2c944 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1222,8 +1222,10 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
rq = list_first_entry(list, struct request, queuelist);
hctx = rq->mq_hctx;
- if (!got_budget && !blk_mq_get_dispatch_budget(hctx))
+ if (!got_budget && !blk_mq_get_dispatch_budget(hctx)) {
+ blk_mq_put_driver_tag(rq);
break;
+ }
if (!blk_mq_get_driver_tag(rq)) {
/*