[PATCH 1/2] btrfs: block-group: Fix two rebase errors where assignment for cache is missing

[Qu Wenruo <wqu@suse.com>]

Without proper cache->flags, btrfs space info will be screwed up and
report error at mount time.

And without proper cache->used, commit transaction will report -EEXIST
when running delayed refs.

Please fold this into the original patch "btrfs: block-group: Refactor btrfs_read_block_groups()".

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/block-group.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index b5eededaa750..c2bd85d29070 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1713,6 +1713,8 @@ static int read_one_block_group(struct btrfs_fs_info *info,
 	}
 	read_extent_buffer(leaf, &bgi, btrfs_item_ptr_offset(leaf, slot),
 			   sizeof(bgi));
+	cache->used = btrfs_stack_block_group_used(&bgi);
+	cache->flags = btrfs_stack_block_group_flags(&bgi);
 	if (!mixed && ((cache->flags & BTRFS_BLOCK_GROUP_METADATA) &&
 	    (cache->flags & BTRFS_BLOCK_GROUP_DATA))) {
 			btrfs_err(info,
-- 
2.23.0