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_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.
- type is the type of resource that is released. It must be of the same type you allocated it as before. See bus_alloc_resource(9) for valid types.
- rid is the resource ID of the resource. The rid value must be the same as the one returned by bus_alloc_resource(9).
- 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, SYS_RES_IRQ, foosoftc->irqid, foosoftc->irqres); /* release I/O port resource */ bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid, foosoftc->portres);
SEE ALSO
AUTHORS
This manual page was written by Alexander Langer <alex@big.endian.de>.