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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 <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Xiao Ni <[email protected]>
Cc: Mariusz Dabrowski <[email protected]>
Tested-by: Rui Salvaterra <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Ming Lei 2018-10-29 20:57:18 +08:00 • committed by Jens Axboe
commit ba5d73851e
1 changed files with 6 additions and 17 deletions
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23
block/blk-lib.c
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@ -51,15 +51,12 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
if ((sector | nr_sects) & bs_mask)
return -EINVAL;
if (!nr_sects)
return -EINVAL;
while (nr_sects) {
unsigned int req_sects = nr_sects;
sector_t end_sect;
if (!req_sects)
goto fail;
req_sects = min(req_sects, bio_allowed_max_sectors(q));
end_sect = sector + req_sects;
unsigned int req_sects = min_t(unsigned int, nr_sects,
bio_allowed_max_sectors(q));
bio = blk_next_bio(bio, 0, gfp_mask);
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->bi_iter.bi_size = req_sects << 9;
sector += req_sects;
nr_sects -= req_sects;
sector = end_sect;
/*
* 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;
return 0;
fail:
if (bio) {
submit_bio_wait(bio);
bio_put(bio);
}
*biop = NULL;
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(__blkdev_issue_discard);