bache: fix error return value

Return 0 as failure (as checked for).
Also add INTERNAL_ERROR if  'DI' would be -1.

diff --git a/lib/device/bcache.c b/lib/device/bcache.c
index c78445d9970e5970159120be9513762bff6390e7..fd18eef6ee7faa20d5be54d031747d3dedaf28e2 100644 (file)
--- a/lib/device/bcache.c
+++ b/lib/device/bcache.c
@@ -1514,7 +1514,11 @@ void bcache_clear_fd(int di)
 int bcache_change_fd(int di, int fd)
 {
        if (di >= _fd_table_size)
-               return -1;
+               return 0;
+       if (di < 0) {
+               log_error(INTERNAL_ERROR "Cannot change not openned DI with FD:%d", fd);
+               return 0;
+       }
        _fd_table[di] = fd;
        return 1;
 }