Reference

bus_release_resource(9)

release resources on a bus

NAME

bus_release_resource – release resources on a bus

SYNOPSIS

#include <sys/param.h>

#include <sys/bus.h>

#include <machine/bus.h>

#include <sys/rman.h>

#include <machine/resource.h>

int

bus_release_resource(device_t dev, struct resource *r);

DESCRIPTION

Free a resource allocated by bus_alloc_resource(9). The resource must not be in use on release, i.e., call an appropriate function before (e.g. bus_teardown_intr(9) for IRQs).

dev is the device that owns the resource.

r is the pointer to struct resource, i.e., the resource itself, returned by bus_alloc_resource(9).

RETURN VALUES

EINVAL is returned, if the device dev has no parent, 0 otherwise. The kernel will panic, if it cannot release the resource.

EXAMPLES

	/* deactivate IRQ */
	bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid);
	/* release IRQ resource */
	bus_release_resource(dev, foosoftc->irqres);
	/* release I/O port resource */
	bus_release_resource(dev, foosoftc->portres);

SEE ALSO

bus_alloc_resource(9), device(9), driver(9)

AUTHORS

This manual page was written by Alexander Langer ⟨[email protected]⟩.

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