[PATCH] dm verity fec: fix block calculation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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 <samitolvanen@xxxxxxxxxx>
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
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel



[Index of Archives]     [DM Crypt]     [Fedora Desktop]     [ATA RAID]     [Fedora Marketing]     [Fedora Packaging]     [Fedora SELinux]     [Yosemite Discussion]     [KDE Users]     [Fedora Docs]

  Powered by Linux