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null_blk: fix wrong capacity when bs is not 512 bytes

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set_capacity() sets device's capacity using 512 bytes sectors.
null_blk calculates the number of sectors by size / bs, which
set_capacity is called with. This led to null_blk exposing the
wrong number of sectors when bs is not 512 bytes.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2015-08-31 14:17:31 +02:00 committed by Jens Axboe
parent de65d2d26f
commit 5fdb7e1b97
1 changed files with 1 additions and 2 deletions
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3
drivers/block/null_blk.c
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@ -589,8 +589,7 @@ static int null_add_dev(void)
blk_queue_physical_block_size(nullb->q, bs); blk_queue_physical_block_size(nullb->q, bs);
size = gb * 1024 * 1024 * 1024ULL; size = gb * 1024 * 1024 * 1024ULL;
sector_div(size, bs); set_capacity(disk, size >> 9);
set_capacity(disk, size);
disk->flags |= GENHD_FL_EXT_DEVT | GENHD_FL_SUPPRESS_PARTITION_INFO; disk->flags |= GENHD_FL_EXT_DEVT | GENHD_FL_SUPPRESS_PARTITION_INFO;
disk->major = null_major; disk->major = null_major;