Re: register_chrdev vs. cdev_add

[Jonathan Corbet]

> dev = MKDEV(htrc110_major, htrc110_minor);
> ret = register_chrdev_region(dev, 1, mod_name);
> ret = register_chrdev(dev, mod_name, &htrc110_fops);

If you want to use register_chrdev(), do not make a separate call to
register_chrdev_region().  Those two are not meant to work together.
register_chrdev() implicitly allocates a region of 256 minors for you.

jon
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