/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver idmouse_driver = {
- .owner = THIS_MODULE,
.name = DRIVER_SHORT,
.probe = idmouse_probe,
.disconnect = idmouse_disconnect,
return -ENODEV;
}
- if (*ppos >= IMGSIZE) {
- up (&dev->sem);
- return 0;
- }
-
- count = min ((loff_t)count, IMGSIZE - (*ppos));
-
- if (copy_to_user (buffer, dev->bulk_in_buffer + *ppos, count)) {
- result = -EFAULT;
- } else {
- result = count;
- *ppos += count;
- }
-
+ result = simple_read_from_buffer(buffer, count, ppos,
+ dev->bulk_in_buffer, IMGSIZE);
/* unlock the device */
up(&dev->sem);
return result;
return -ENODEV;
/* allocate memory for our device state and initialize it */
- dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
- memset(dev, 0x00, sizeof(*dev));
init_MUTEX(&dev->sem);
dev->udev = udev;