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.\" $FreeBSD: src/share/man/man9/bus_release_resource.9,v 1.2.2.5 2001/12/17 11:30:18 ru Exp $ 30.\" $DragonFly: src/share/man/man9/bus_release_resource.9,v 1.2 2003/06/17 04:37:01 dillon Exp $ 31.\" 32.Dd May 18, 2000 33.Dt BUS_RELEASE_RESOURCE 9 34.Os 35.Sh NAME 36.Nm bus_release_resource 37.Nd release resources on a bus 38.Sh SYNOPSIS 39.In sys/param.h 40.In sys/bus.h 41.Pp 42.In machine/bus.h 43.In sys/rman.h 44.In machine/resource.h 45.Ft int 46.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r" 47.Sh DESCRIPTION 48Free a resource allocated by 49.Xr bus_alloc_resource 9 . 50The resource must not be in use on release, i.e. call an appropriate function 51before (e.g.\& 52.Xr bus_teardown_intr 9 53for IRQs). 54.Bl -item 55.It 56.Fa dev 57is the device that owns the resource. 58.It 59.Fa type 60is the type of resource that is released. 61It must be of the same type you allocated it as before. 62See 63.Xr bus_alloc_resource 9 64for valid types. 65.It 66.Fa rid 67is the resource ID of the resource. 68The 69.Fa rid 70value must be the same as the one returned by 71.Xr bus_alloc_resource 9 . 72.It 73.Fa r 74is the pointer to 75.Va struct res , 76i.e. the resource itself, 77returned by 78.Xr bus_alloc_resource 9 . 79.El 80.Sh RETURN VALUES 81.Er EINVAL 82is returned, if the device 83.Fa dev 84has no parent, 85.Dv 0 86otherwise. 87The kernel will panic, if it can't release the resource. 88.Sh EXAMPLES 89.Bd -literal 90 /* deactivate IRQ */ 91 bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid); 92 93 /* release IRQ resource */ 94 bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid, 95 foosoftc->irqres); 96 97 /* release I/O port resource */ 98 bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid, 99 foosoftc->portres); 100.Ed 101.Sh SEE ALSO 102.Xr bus_alloc_resource 9 , 103.Xr device 9 , 104.Xr driver 9 105.Sh AUTHORS 106This man page was written by 107.An Alexander Langer Aq alex@big.endian.de . 108