From 0b6e522cdc4a76352e5f02fc2d92198f03254425 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 24 Jan 2021 11:02:38 +0100 Subject: blk-mq: use ->bi_bdev for I/O accounting Remove the reverse map from a sector to a partition for I/O accounting by simply using ->bi_bdev. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe --- block/blk-core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'block/blk-core.c') diff --git a/block/blk-core.c b/block/blk-core.c index 9315311c27a9..6dfbdde6b9ff 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1298,7 +1298,11 @@ void blk_account_io_start(struct request *rq) if (!blk_do_io_stat(rq)) return; - rq->part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq)); + /* passthrough requests can hold bios that do not have ->bi_bdev set */ + if (rq->bio && rq->bio->bi_bdev) + rq->part = rq->bio->bi_bdev; + else + rq->part = rq->rq_disk->part0; part_stat_lock(); update_io_ticks(rq->part, jiffies, false); -- cgit v1.2.3