Commit f6804743 authored Nov 23, 2017 by weiping zhang Committed by Jens Axboe Nov 23, 2017

blk-sysfs: remove NULL pointer checking in queue_wb_lat_store



wbt_init doesn't set q->rq_wb to NULL, if wbt_init return 0,
so check return value is enough, remove NULL checking.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 612ea091

block/blk-sysfs.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -450,12 +450,9 @@ static ssize_t queue_wb_lat_store(struct request_queue q, const char page,
		ret = wbt_init(q);
		if (ret)
		return ret;

		rwb = q->rq_wb;
		if (!rwb)
		return -EINVAL;
		}

		rwb = q->rq_wb;
		if (val == -1)
		rwb->min_lat_nsec = wbt_default_latency_nsec(q);
		else if (val >= 0)