libfdisk: use list_add_tail() in more robust way

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/libfdisk/src/table.c b/libfdisk/src/table.c
index 4881db68e2acb759050d142e95d1824c02c826eb..7718daebba8339111149c99b3ee2b8463b33994e 100644 (file)
--- a/libfdisk/src/table.c
+++ b/libfdisk/src/table.c
@@ -225,6 +225,9 @@ int fdisk_table_add_partition(struct fdisk_table *tb, struct fdisk_partition *pa
        if (!tb || !pa)
                return -EINVAL;
 
+       if (!list_empty(&pa->parts))
+               return -EBUSY;
+
        fdisk_ref_partition(pa);
        list_add_tail(&pa->parts, &tb->parts);
        tb->nents++;