block: don't call blk_throtl_stat_add for non-READ/WRITE commands
blk_throtl_stat_add is called from blk_stat_add explicitly, unlike the other stats that go through q->stats->callbacks. To prepare for cgroup data moving to the gendisk, ensure blk_throtl_stat_add is only called for the plain READ and WRITE commands that it actually handles internally, as blk_stat_add can also be called for passthrough commands on queues that do not have a gendisk associated with them. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andreas Herrmann <aherrmann@suse.de> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20230203150400.3199230-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -58,7 +58,8 @@ void blk_stat_add(struct request *rq, u64 now)
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value = (now >= rq->io_start_time_ns) ? now - rq->io_start_time_ns : 0;
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blk_throtl_stat_add(rq, value);
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if (req_op(rq) == REQ_OP_READ || req_op(rq) == REQ_OP_WRITE)
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blk_throtl_stat_add(rq, value);
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rcu_read_lock();
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cpu = get_cpu();
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