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Commit e9137d4b authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

blk-mq: Fix NULL pointer updating nr_requests 



A h/w context's tags are freed if it was not assigned a CPU. Check if
the context has tags before updating the depth.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 66841672

block/blk-mq.c

+2 −0
Original line number Diff line number Diff line
@@ -2336,6 +2336,8 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr) 


	ret = 0;

	queue_for_each_hw_ctx(q, hctx, i) {

		if (!hctx->tags)

			continue;

		ret = blk_mq_tag_update_depth(hctx->tags, nr);

		if (ret)

			break;