diff --git a/block/ioctl.c b/block/ioctl.c
index 3be4d0e2a96c32ce23d0aba39f6a446c2437d9d6..ed240e170e148b0aa3009ad77a8d179328f54f3b 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -98,6 +98,8 @@ static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
 		return -EINVAL;
 	if (!capable(CAP_SYS_ADMIN))
 		return -EACCES;
+	if (bdev->bd_part_count)
+		return -EBUSY;
 
 	/*
 	 * Reopen the device to revalidate the driver state and force a