X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fmd%2Fdm-exception-store.c;h=0bdb201c2c2af04ceea2905db5f56c10fe1091df;hb=e799d0bce6b191de6e96e556528243c1d73303ca;hp=2b7907b6dd094611c8cc9f31fbead6d7b553e1d7;hpb=f6f223039c0d0683bdea1eabd35b309e10311a60;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 2b7907b6dd09..0bdb201c2c2a 100644
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -173,7 +173,9 @@ int dm_exception_store_set_chunk_size(struct dm_exception_store *store,
 
 	/* Validate the chunk size against the device block size */
 	if (chunk_size %
-	    (bdev_logical_block_size(dm_snap_cow(store->snap)->bdev) >> 9)) {
+	    (bdev_logical_block_size(dm_snap_cow(store->snap)->bdev) >> 9) ||
+	    chunk_size %
+	    (bdev_logical_block_size(dm_snap_origin(store->snap)->bdev) >> 9)) {
 		*error = "Chunk size is not a multiple of device blocksize";
 		return -EINVAL;
 	}