Modifying a Kernel Space Function in openSUSE-11.3 - usb

Question

I have been working on a K-space USB driver for learning purposes.
As far as I have studied the Kernel Space Source files that are included during the time when the USB driver is performing its routines, I have found announce_devices() is the function which prints the information of the all USB devices connected over the bus.
I plugged in a USB device (a BeagleBoard-xM, in which I have set Product ID and Vendor ID and other descriptors and all of them are verified in User-Space using libusb code), started the computer. When I did a dmesg, I was expecting to see my device. But it didn't show up. Then I ran the libusb code that I have written, it shows the device.
Due to this, I assume that my device is being enumerated normally.
Question #1: If the libusb code is working perfectly alright, that must be going wrong with the module that I have inserted, right? The code is shared below. (This code is taken as an answer in Stack Overflow question Programmatically obtaining the vendor ID, product ID of a USB device on a Linux platform I had written back in January, and it worked fine then). So is my driver working fine? I have rebuild the kernel a number of times (for a number of dynamic modules) after implementing the above code.
Question #2: Can I modify the Kernel-Space function announce_devices() and rebuild the kernel on my machine and verify?
P.S.: Necessary inclusions have been made.
Having gone through almost all the necessary header files, I know that I should be (and I was last time around ) able to access the vendor ID, product ID, and manufacturer details of the USB device through a structure: struct usb_device{} which has a member struct usb_device_descriptor{}. This nested structure has idVendor, idProduct and iManufacturer and some other members.
//*******************************************
struct usb_device udev;
struct usb_bus *bus;
ssize_t ret;
static int __init usb_fun_init (void)
{
int result;
__le16 idVendor = 0;
__le16 idProduct = 0;
__u8 iManufacturer = 0;
__u8 iSerialNumber = 0;
printk(KERN_INFO "\n************************************ in init\n");
list_for_each_entry(bus, &usb_bus_list, bus_list)
{
printk(KERN_INFO "***************** Begins ****************");
printk(KERN_INFO "Vendor ID = %x", bus->root_hub->descriptor.idVendor);
printk(KERN_INFO "Product ID = %x", bus->root_hub->descriptor.idProduct);
printk(KERN_INFO "Serial Number = %x", bus->root_hub->descriptor.iSerialNumber);
//printk(KERN_INFO "Manu = %s", bus->root_hub->descriptor.iManufacturer);
printk(KERN_INFO "Manu = %s", bus->root_hub->manufacturer);
printk(KERN_INFO "Product = %s", bus->root_hub->product);
printk(KERN_INFO "Serial Number = %s", bus->root_hub->serial);
printk(KERN_INFO "\nManufacturer = %s", udev.bus.iManufacturer);
}
return 0;
}
static void __exit usb_fun_exit (void)
{
printk(KERN_INFO "\n************************************ in exit\n");
}
module_init(usb_fun_init);
module_exit(usb_fun_exit);
MODULE_LICENSE("GPL");