Commit ac77a0c4 authored Mar 30, 2017 by Minchan Kim Committed by Jens Axboe Mar 30, 2017

block: do not put mq context in blk_mq_alloc_request_hctx



In blk_mq_alloc_request_hctx, blk_mq_sched_get_request doesn't
get sw context so we don't need to put the context with
blk_mq_put_ctx. Unless, we will see preempt counter underflow.

Cc: Omar Sandoval <osandov@fb.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent 89970a04

block/blk-mq.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -321,7 +321,6 @@ struct request blk_mq_alloc_request_hctx(struct request_queue q, int rw,

		rq = blk_mq_sched_get_request(q, NULL, rw, &alloc_data);

		blk_mq_put_ctx(alloc_data.ctx);
		blk_queue_exit(q);

		if (!rq)

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