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<table class="head">
<tr>
<td class="head-ltitle">BUS_RELEASE_RESOURCE(9)</td>
<td class="head-vol">Kernel Developer's Manual</td>
<td class="head-rtitle">BUS_RELEASE_RESOURCE(9)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">bus_release_resource</code> —
<span class="Nd">release resources on a bus</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="In">#include
<<a class="In">sys/param.h</a>></code>
<br/>
<code class="In">#include <<a class="In">sys/bus.h</a>></code></p>
<p class="Pp">
<br/>
<code class="In">#include <<a class="In">machine/bus.h</a>></code>
<br/>
<code class="In">#include <<a class="In">sys/rman.h</a>></code>
<br/>
<code class="In">#include
<<a class="In">machine/resource.h</a>></code></p>
<p class="Pp"><var class="Ft">int</var>
<br/>
<code class="Fn">bus_release_resource</code>(<var class="Fa" style="white-space: nowrap;">device_t
dev</var>, <var class="Fa" style="white-space: nowrap;">struct resource
*r</var>);</p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">Free a resource allocated by
<a class="Xr">bus_alloc_resource(9)</a>. The resource must not be in use on
release, i.e., call an appropriate function before (e.g.
<a class="Xr">bus_teardown_intr(9)</a> for IRQs).</p>
<ul class="Bl-item">
<li><var class="Fa">dev</var> is the device that owns the resource.</li>
<li><var class="Fa">r</var> is the pointer to <var class="Va">struct
resource</var>, i.e., the resource itself, returned by
<a class="Xr">bus_alloc_resource(9)</a>.</li>
</ul>
</section>
<section class="Sh">
<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
VALUES</a></h1>
<p class="Pp"><code class="Er">EINVAL</code> is returned, if the device
<var class="Fa">dev</var> has no parent, <code class="Dv">0</code>
otherwise. The kernel will panic, if it cannot release the resource.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="EXAMPLES"><a class="permalink" href="#EXAMPLES">EXAMPLES</a></h1>
<div class="Bd Li">
<pre> /* deactivate IRQ */
bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid);
/* release IRQ resource */
bus_release_resource(dev, foosoftc->irqres);
/* release I/O port resource */
bus_release_resource(dev, foosoftc->portres);</pre>
</div>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<p class="Pp"><a class="Xr">bus_alloc_resource(9)</a>,
<a class="Xr">device(9)</a>, <a class="Xr">driver(9)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp">This manual page was written by <span class="An">Alexander
Langer</span>
<<a class="Mt" href="mailto:alex@big.endian.de">alex@big.endian.de</a>>.</p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">March 13, 2024</td>
<td class="foot-os">FreeBSD 15.0</td>
</tr>
</table>
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