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block: remove two comments in bio_split_discard

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A zero discard_granularity is not treated the same as a single-block one,
and not having any segments after taking alignment is perfectly fine
and does not need a warning.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-12-28 07:55:37 +00:00 committed by Jens Axboe
parent d6b9f4e6f7
commit 928a5dd3a8
1 changed files with 1 additions and 5 deletions
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6
block/blk-merge.c
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@ -115,17 +115,13 @@ static struct bio *bio_split_discard(struct bio *bio,
*nsegs = 1;
/* Zero-sector (unknown) and one-sector granularities are the same. */
granularity = max(lim->discard_granularity >> 9, 1U);
max_discard_sectors =
min(lim->max_discard_sectors, bio_allowed_max_sectors(lim));
max_discard_sectors -= max_discard_sectors % granularity;
if (unlikely(!max_discard_sectors)) {
/* XXX: warn */
if (unlikely(!max_discard_sectors))
return NULL;
}
if (bio_sectors(bio) <= max_discard_sectors)
return NULL;