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block: cleanup __blkdev_issue_write_zeroes

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Use min to calculate the next number of sectors like everyone else.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240223155910.3622666-3-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2024-02-23 07:59:08 -08:00 committed by Jens Axboe
parent 5affe497c3
commit 76a27e1b53
1 changed files with 9 additions and 12 deletions
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21
block/blk-lib.c
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@ -120,31 +120,28 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
struct bio **biop, unsigned flags)
{
struct bio *bio = *biop;
unsigned int max_write_zeroes_sectors;
unsigned int max_sectors;
if (bdev_read_only(bdev))
return -EPERM;
/* Ensure that max_write_zeroes_sectors doesn't overflow bi_size */
max_write_zeroes_sectors = bdev_write_zeroes_sectors(bdev);
/* Ensure that max_sectors doesn't overflow bi_size */
max_sectors = bdev_write_zeroes_sectors(bdev);
if (max_write_zeroes_sectors == 0)
if (max_sectors == 0)
return -EOPNOTSUPP;
while (nr_sects) {
unsigned int len = min_t(sector_t, nr_sects, max_sectors);
bio = blk_next_bio(bio, bdev, 0, REQ_OP_WRITE_ZEROES, gfp_mask);
bio->bi_iter.bi_sector = sector;
if (flags & BLKDEV_ZERO_NOUNMAP)
bio->bi_opf |= REQ_NOUNMAP;
if (nr_sects > max_write_zeroes_sectors) {
bio->bi_iter.bi_size = max_write_zeroes_sectors << 9;
nr_sects -= max_write_zeroes_sectors;
sector += max_write_zeroes_sectors;
} else {
bio->bi_iter.bi_size = nr_sects << 9;
nr_sects = 0;
}
bio->bi_iter.bi_size = len << SECTOR_SHIFT;
nr_sects -= len;
sector += len;
cond_resched();
}