1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2000 Alexander Langer 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 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