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