Commit 4b72029d authored by Li Zefan's avatar Li Zefan
Browse files

btrfs: Fix error handling in zlib 



Return failure if alloc_page() fails to allocate memory,
and the upper code will just give up compression.

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
parent 8844355d

fs/btrfs/zlib.c

+8 −0
Original line number Diff line number Diff line
@@ -225,6 +225,10 @@ int btrfs_zlib_compress_pages(struct address_space *mapping, 
	data_in = kmap(in_page);



	out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);

	if (out_page == NULL) {

		ret = -1;

		goto out;

	}

	cpage_out = kmap(out_page);

	pages[0] = out_page;

	nr_pages = 1;
@@ -263,6 +267,10 @@ int btrfs_zlib_compress_pages(struct address_space *mapping, 
				goto out;

			}

			out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);

			if (out_page == NULL) {

				ret = -1;

				goto out;

			}

			cpage_out = kmap(out_page);

			pages[nr_pages] = out_page;

			nr_pages++;