Проект OpenNet: MAN bus_release_resource (9) Ядро (FreeBSD и Linux)

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bus_release_resource (9)

>> bus_release_resource (9) ( FreeBSD man: Ядро )

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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 int type int rid struct resource *r);

DESCRIPTION

Free a resource allocated by bus_alloc_resource9. The resource must not be in use on release, i.e., call an appropriate function before (e.g. bus_teardown_intr9 for IRQs).

Fa dev: is the device that owns the resource.
Fa type: is the type of resource that is released. It must be of the same type you allocated it as before. See bus_alloc_resource9 for valid types.
Fa rid: is the resource ID of the resource. The Fa rid value must be the same as the one returned by bus_alloc_resource9.
Fa r: is the pointer to struct res i.e., the resource itself, returned by bus_alloc_resource9.

RETURN VALUES

Er EINVAL is returned, if the device Fa 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, SYS_RES_IRQ, foosoftc->irqid,
                foosoftc->irqres);

        /* release I/O port resource */
        bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid,
                foosoftc->portres);