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| author | Damien Le Moal <damien.lemoal@wdc.com> | 2016-11-22 15:38:49 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-11-22 08:09:09 -0700 |
| commit | 4d1a4765426fb57439164089b3cb537ec65356eb (patch) | |
| tree | 6991c8002d4ff2b4d41e48efda0bff7cff419c35 /fs/block_dev.c | |
| parent | 778889d8412e36e666b1e4ce108373613c84b428 (diff) | |
| download | lwn-4d1a4765426fb57439164089b3cb537ec65356eb.tar.gz lwn-4d1a4765426fb57439164089b3cb537ec65356eb.zip | |
block_dev: Fixed direct I/O bio sector calculation
A direct I/O alignment must be always checked against the device blocks size,
but the I/O offset (bio->bi_iter.bi_sector must always use 512B sector unit, and
not the actual logical block size.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 35cc494f2e1a..e49fb797e447 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -226,7 +226,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, bio.bi_max_vecs = nr_pages; bio.bi_io_vec = vecs; bio.bi_bdev = bdev; - bio.bi_iter.bi_sector = pos >> blkbits; + bio.bi_iter.bi_sector = pos >> 9; bio.bi_private = current; bio.bi_end_io = blkdev_bio_end_io_simple; @@ -358,7 +358,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) for (;;) { bio->bi_bdev = bdev; - bio->bi_iter.bi_sector = pos >> blkbits; + bio->bi_iter.bi_sector = pos >> 9; bio->bi_private = dio; bio->bi_end_io = blkdev_bio_end_io; |