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Commit 3a92168b authored by weiping zhang's avatar weiping zhang Committed by Jens Axboe
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block: add WARN_ON if bdi register fail 



device_add_disk need do more safety error handle, so this patch just
add WARN_ON.

Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarweiping zhang <zhangweiping@didichuxing.com>

Adapted for current series by me.
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a0747a85

block/genhd.c

+5 −2
Original line number Diff line number Diff line
@@ -671,10 +671,13 @@ void device_add_disk(struct device *parent, struct gendisk *disk) 
		disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;

		disk->flags |= GENHD_FL_NO_PART_SCAN;

	} else {

		int ret;



		/* Register BDI before referencing it from bdev */

		disk_to_dev(disk)->devt = devt;

		bdi_register_owner(disk->queue->backing_dev_info,

		ret = bdi_register_owner(disk->queue->backing_dev_info,

						disk_to_dev(disk));

		WARN_ON(ret);

		blk_register_region(disk_devt(disk), disk->minors, NULL,

				    exact_match, exact_lock, disk);

	}