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| author | Ming Lei <ming.lei@redhat.com> | 2018-10-29 20:57:17 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-09 06:23:14 -0700 |
| commit | 1adfc5e4136f5967d591c399aff95b3b035f16b7 (patch) | |
| tree | 8721fafeef167a567a2fe7838071e0f17e01d02c /block/blk-lib.c | |
| parent | d39aa4979219ca3d61c492f7460f1032b97b9ef2 (diff) | |
| download | lwn-1adfc5e4136f5967d591c399aff95b3b035f16b7.tar.gz lwn-1adfc5e4136f5967d591c399aff95b3b035f16b7.zip | |
block: make sure discard bio is aligned with logical block size
Obviously the created discard bio has to be aligned with logical block size.
This patch introduces the helper of bio_allowed_max_sectors() for
this purpose.
Cc: stable@vger.kernel.org
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>
Fixes: 744889b7cbb56a6 ("block: don't deal with discard limit in blkdev_issue_discard()")
Fixes: a22c4d7e34402cc ("block: re-add discard_granularity and alignment checks")
Reported-by: Rui Salvaterra <rsalvaterra@gmail.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>
Diffstat (limited to 'block/blk-lib.c')
| -rw-r--r-- | block/blk-lib.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index 76f867ea9a9b..d56fd159d2e8 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -57,8 +57,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, if (!req_sects) goto fail; - if (req_sects > UINT_MAX >> 9) - req_sects = UINT_MAX >> 9; + req_sects = min(req_sects, bio_allowed_max_sectors(q)); end_sect = sector + req_sects; |