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 March 13, 2024 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" "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 r 57is the pointer to 58.Va struct resource , 59i.e., the resource itself, 60returned by 61.Xr bus_alloc_resource 9 . 62.El 63.Sh RETURN VALUES 64.Er EINVAL 65is returned, if the device 66.Fa dev 67has no parent, 68.Dv 0 69otherwise. 70The kernel will panic, if it cannot release the resource. 71.Sh EXAMPLES 72.Bd -literal 73 /* deactivate IRQ */ 74 bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid); 75 76 /* release IRQ resource */ 77 bus_release_resource(dev, foosoftc->irqres); 78 79 /* release I/O port resource */ 80 bus_release_resource(dev, foosoftc->portres); 81.Ed 82.Sh SEE ALSO 83.Xr bus_alloc_resource 9 , 84.Xr device 9 , 85.Xr driver 9 86.Sh AUTHORS 87This manual page was written by 88.An Alexander Langer Aq Mt alex@big.endian.de . 89