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authorJoe Thornber <ejt@redhat.com>2014-11-24 14:08:57 +0000
committerMike Snitzer <snitzer@redhat.com>2014-12-01 11:30:07 -0500
commit8001e87d0ee98787c46f14f5f4f97aced70f119f (patch)
treeff70d07dbafed0b3da8310eb9aff894ef8d4ed18 /drivers/md
parenta12f5d48bdfeb5fe10157ac01c3de29269f457c6 (diff)
dm array: if resizing the array is a noop set the new root to the old one
This could've been quite bad (to return success but not update the new root to point at the old) but in practice the only known consumer of the dm array code is the DM cache target. And the DM cache target passes in the same old root to array_resize() anyway. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/persistent-data/dm-array.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/persistent-data/dm-array.c b/drivers/md/persistent-data/dm-array.c
index 1d75b1dc1e2e..e64b61ad0ef3 100644
--- a/drivers/md/persistent-data/dm-array.c
+++ b/drivers/md/persistent-data/dm-array.c
@@ -645,8 +645,10 @@ static int array_resize(struct dm_array_info *info, dm_block_t root,
int r;
struct resize resize;
- if (old_size == new_size)
+ if (old_size == new_size) {
+ *new_root = root;
return 0;
+ }
resize.info = info;
resize.root = root;

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