1.\" Copyright (c) 2000 Alexander Langer 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/bus_release_resource.9,v 1.2.2.5 2001/12/17 11:30:18 ru Exp $ 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 sys/rman.h 40.In sys/resource.h 41.Ft int 42.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r" 43.Sh DESCRIPTION 44Free a resource allocated by 45.Xr bus_alloc_resource 9 . 46The resource must not be in use on release, i.e. call an appropriate function 47before (e.g.\& 48.Xr bus_teardown_intr 9 49for IRQs). 50.Bl -item 51.It 52.Fa dev 53is the device that owns the resource. 54.It 55.Fa type 56is the type of resource that is released. 57It must be of the same type you allocated it as before. 58See 59.Xr bus_alloc_resource 9 60for valid types. 61.It 62.Fa rid 63is the resource ID of the resource. 64The 65.Fa rid 66value must be the same as the one returned by 67.Xr bus_alloc_resource 9 . 68.It 69.Fa r 70is the pointer to 71.Va struct res , 72i.e. the resource itself, 73returned by 74.Xr bus_alloc_resource 9 . 75.El 76.Sh RETURN VALUES 77.Er EINVAL 78is returned, if the device 79.Fa dev 80has no parent, 81.Dv 0 82otherwise. 83The kernel will panic, if it can't release the resource. 84.Sh EXAMPLES 85.Bd -literal 86 /* deactivate IRQ */ 87 bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid); 88 89 /* release IRQ resource */ 90 bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid, 91 foosoftc->irqres); 92 93 /* release I/O port resource */ 94 bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid, 95 foosoftc->portres); 96.Ed 97.Sh SEE ALSO 98.Xr bus_alloc_resource 9 , 99.Xr device 9 , 100.Xr driver 9 101.Sh AUTHORS 102This man page was written by 103.An Alexander Langer Aq Mt alex@big.endian.de . 104