4.19-stable review patch. If anyone has any objections, please let me know.
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From: Ming Lei ming.lei@redhat.com
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: 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: b49a0871be31a745b2ef ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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);