From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Josef Bacik To: , , Subject: [PATCH] block: set make_request_fn manually in blk_mq_update_nr_hw_queues Date: Fri, 10 Feb 2017 13:03:33 -0500 Message-ID: <1486749813-2167-1-git-send-email-jbacik@fb.com> MIME-Version: 1.0 Content-Type: text/plain List-ID: Calling blk_queue_make_request resets a bunch of settings on the request_queue, but all we really want is to update the make_request_fn, so do this directly so we don't lose things like the logical and physical block sizes. Signed-off-by: Josef Bacik --- block/blk-mq.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index be183e61..eccbb13 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2627,10 +2627,14 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) list_for_each_entry(q, &set->tag_list, tag_set_list) { blk_mq_realloc_hw_ctxs(set, q); + /* + * Manually set the make_request_fn as blk_queue_make_request + * resets a lot of the queue settings. + */ if (q->nr_hw_queues > 1) - blk_queue_make_request(q, blk_mq_make_request); + q->make_request_fn = blk_mq_make_request; else - blk_queue_make_request(q, blk_sq_make_request); + q->make_request_fn = blk_sq_make_request; blk_mq_queue_reinit(q, cpu_online_mask); } -- 2.7.4