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/share/man/man9/bus_release_resource.9

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  3.\" Copyright (c) 2000 Alexander Langer
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 29.\" $FreeBSD$
 30.\"
 31.Dd May 18, 2000
 32.Dt BUS_RELEASE_RESOURCE 9
 33.Os
 34.Sh NAME
 35.Nm bus_release_resource
 36.Nd release resources on a bus
 37.Sh SYNOPSIS
 38.In sys/param.h
 39.In sys/bus.h
 40.Pp
 41.In machine/bus.h
 42.In sys/rman.h
 43.In machine/resource.h
 44.Ft int
 45.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r"
 46.Sh DESCRIPTION
 47Free a resource allocated by
 48.Xr bus_alloc_resource 9 .
 49The resource must not be in use on release, i.e., call an appropriate function
 50before (e.g.\&
 51.Xr bus_teardown_intr 9
 52for IRQs).
 53.Bl -item
 54.It
 55.Fa dev
 56is the device that owns the resource.
 57.It
 58.Fa type
 59is the type of resource that is released.
 60It must be of the same type you allocated it as before.
 61See
 62.Xr bus_alloc_resource 9
 63for valid types.
 64.It
 65.Fa rid
 66is the resource ID of the resource.
 67The
 68.Fa rid
 69value must be the same as the one returned by
 70.Xr bus_alloc_resource 9 .
 71.It
 72.Fa r
 73is the pointer to
 74.Va struct resource ,
 75i.e., the resource itself,
 76returned by
 77.Xr bus_alloc_resource 9 .
 78.El
 79.Sh RETURN VALUES
 80.Er EINVAL
 81is returned, if the device
 82.Fa dev
 83has no parent,
 84.Dv 0
 85otherwise.
 86The kernel will panic, if it cannot release the resource.
 87.Sh EXAMPLES
 88.Bd -literal
 89	/* deactivate IRQ */
 90	bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid);
 91
 92	/* release IRQ resource */
 93	bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid,
 94		foosoftc->irqres);
 95
 96	/* release I/O port resource */
 97	bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid,
 98		foosoftc->portres);
 99.Ed
100.Sh SEE ALSO
101.Xr bus_alloc_resource 9 ,
102.Xr device 9 ,
103.Xr driver 9
104.Sh AUTHORS
105This manual page was written by
106.An Alexander Langer Aq alex@big.endian.de .