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howto use request_region() ?

...
	unsigned int pnp_addr = 0x279;
	if (!request_region(pnp_addr, 1, "my_drv")) {
		printk(KERN_INFO "pnp_addr port not available.\n");
	} else {
		printk(KERN_INFO "pnp_addr port available.\n");
		release_region(pnp_addr, 1);
	}

...

i can't assign an specific region, always return NULL pointer.

in user space, using iopl(), i access to pnp_addr port, and comunication
with pnp directly.


i need other things to use request_region() ?
seeing /proc/ioport 0x279 is not used

TIA

--ArYiX

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