4.19-stable review patch. If anyone has any objections, please let me know.
------------------ From: Ming Lei <[email protected]> commit 34ffec60b27aa81d04e274e71e4c6ef740f75fc7 upstream. Obviously the created writesame bio has to be aligned with logical block size, and use bio_allowed_max_sectors() to retrieve this number. Cc: [email protected] Cc: Mike Snitzer <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Xiao Ni <[email protected]> Cc: Mariusz Dabrowski <[email protected]> Fixes: b49a0871be31a745b2ef ("block: remove split code in blkdev_issue_{discard,write_same}") Tested-by: Rui Salvaterra <[email protected]> Signed-off-by: Ming Lei <[email protected]> Signed-off-by: Jens Axboe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- block/blk-lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -161,7 +161,7 @@ static int __blkdev_issue_write_same(str 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 = next_bio(bio, 1, gfp_mask);
