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block: cleanup __blkdev_issue_discard()

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Cleanup __blkdev_issue_discard() a bit:

- remove local variable of 'end_sect'
- remove code block of 'fail'

Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Xiao Ni <xni@redhat.com>
Cc: Mariusz Dabrowski <mariusz.dabrowski@intel.com>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2018-10-29 20:57:18 +08:00 committed by Jens Axboe
parent 1adfc5e413
commit ba5d73851e
1 changed files with 6 additions and 17 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

23
block/blk-lib.c
View file

@ -51,15 +51,12 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
if ((sector | nr_sects) & bs_mask) if ((sector | nr_sects) & bs_mask)
return -EINVAL; return -EINVAL;
if (!nr_sects)
return -EINVAL;
while (nr_sects) { while (nr_sects) {
unsigned int req_sects = nr_sects; unsigned int req_sects = min_t(unsigned int, nr_sects,
sector_t end_sect; bio_allowed_max_sectors(q));
if (!req_sects)
goto fail;
req_sects = min(req_sects, bio_allowed_max_sectors(q));
end_sect = sector + req_sects;
bio = blk_next_bio(bio, 0, gfp_mask); bio = blk_next_bio(bio, 0, gfp_mask);
bio->bi_iter.bi_sector = sector; bio->bi_iter.bi_sector = sector;
@ -67,8 +64,8 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
bio_set_op_attrs(bio, op, 0); bio_set_op_attrs(bio, op, 0);
bio->bi_iter.bi_size = req_sects << 9; bio->bi_iter.bi_size = req_sects << 9;
sector += req_sects;
nr_sects -= req_sects; nr_sects -= req_sects;
sector = end_sect;
/* /*
* We can loop for a long time in here, if someone does * We can loop for a long time in here, if someone does
@ -81,14 +78,6 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
*biop = bio; *biop = bio;
return 0; return 0;
fail:
if (bio) {
submit_bio_wait(bio);
bio_put(bio);
}
*biop = NULL;
return -EOPNOTSUPP;
} }
EXPORT_SYMBOL(__blkdev_issue_discard); EXPORT_SYMBOL(__blkdev_issue_discard);