do_div was replaced with div64_u64 at some point, causing a bug with block calculation due to incompatible semantics of the two functions.
Signed-off-by: Sami Tolvanen <[email protected]> Fixes: a739ff3f543a ("dm verity: add support for forward error correction") --- drivers/md/dm-verity-fec.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c index 459a9f8..0f0eb8a 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -453,9 +453,7 @@ int verity_fec_decode(struct dm_verity *v, struct dm_verity_io *io, */ offset = block << v->data_dev_block_bits; - - res = offset; - div64_u64(res, v->fec->rounds << v->data_dev_block_bits); + res = div64_u64(offset, v->fec->rounds << v->data_dev_block_bits); /* * The base RS block we can feed to the interleaver to find out all -- 2.8.0.rc3.226.g39d4020 -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
