diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index a554856a5f8a6f45d61a83906c8d9ee3869641c0..7e8b0d6a7961f355302da4567387c4f427099f42 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -230,8 +230,10 @@ static int lzo_compress_pages(struct list_head *ws,
 		in_len = min(bytes_left, PAGE_SIZE);
 	}
 
-	if (tot_out > tot_in)
+	if (tot_out >= tot_in) {
+		ret = -E2BIG;
 		goto out;
+	}
 
 	/* store the size of all chunks of compressed data */
 	cpage_out = kmap(pages[0]);