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.\" $DragonFly: src/share/man/man9/bus_release_resource.9,v 1.3 2004/06/01 11:36:53 hmp Exp $ 29.\" 30.Dd May 18, 2000 31.Dt BUS_RELEASE_RESOURCE 9 32.Os 33.Sh NAME 34.Nm bus_release_resource 35.Nd release resources on a bus 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/bus.h 39.Pp 40.In machine/bus.h 41.In sys/rman.h 42.In machine/resource.h 43.Ft int 44.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r" 45.Sh DESCRIPTION 46Free a resource allocated by 47.Xr bus_alloc_resource 9 . 48The resource must not be in use on release, i.e. call an appropriate function 49before (e.g.\& 50.Xr bus_teardown_intr 9 51for IRQs). 52.Bl -item 53.It 54.Fa dev 55is the device that owns the resource. 56.It 57.Fa type 58is the type of resource that is released. 59It must be of the same type you allocated it as before. 60See 61.Xr bus_alloc_resource 9 62for valid types. 63.It 64.Fa rid 65is the resource ID of the resource. 66The 67.Fa rid 68value must be the same as the one returned by 69.Xr bus_alloc_resource 9 . 70.It 71.Fa r 72is the pointer to 73.Va struct res , 74i.e. the resource itself, 75returned by 76.Xr bus_alloc_resource 9 . 77.El 78.Sh RETURN VALUES 79.Er EINVAL 80is returned, if the device 81.Fa dev 82has no parent, 83.Dv 0 84otherwise. 85The kernel will panic, if it can't release the resource. 86.Sh EXAMPLES 87.Bd -literal 88 /* deactivate IRQ */ 89 bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid); 90 91 /* release IRQ resource */ 92 bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid, 93 foosoftc->irqres); 94 95 /* release I/O port resource */ 96 bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid, 97 foosoftc->portres); 98.Ed 99.Sh SEE ALSO 100.Xr bus_alloc_resource 9 , 101.Xr device 9 , 102.Xr driver 9 103.Sh AUTHORS 104This man page was written by 105.An Alexander Langer Aq alex@big.endian.de . 106