Commit 34ffec60 authored Oct 29, 2018 by Ming Lei Committed by Jens Axboe Nov 09, 2018

block: make sure writesame bio is aligned with logical block size



Obviously the created writesame bio has to be aligned with logical block
size, and use bio_allowed_max_sectors() to retrieve this number.

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: b49a0871 ("block: remove split code in blkdev_issue_{discard,write_same}")
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent ba5d7385

block/blk-lib.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -149,7 +149,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
		return -EOPNOTSUPP;

		/* Ensure that max_write_same_sectors doesn't overflow bi_size */
		max_write_same_sectors = UINT_MAX >> 9;
		max_write_same_sectors = bio_allowed_max_sectors(q);

		while (nr_sects) {
		bio = blk_next_bio(bio, 1, gfp_mask);

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