1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>sata_down_spd_limit</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="libATA Developer's Guide"><link rel="up" href="libataInt.html" title="Chapter&#160;5.&#160;libata Core Internals"><link rel="prev" href="API-sata-print-link-status.html" title="sata_print_link_status"><link rel="next" href="API-sata-set-spd-needed.html" title="sata_set_spd_needed"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">sata_down_spd_limit</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-sata-print-link-status.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;5.&#160;libata Core Internals</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-sata-set-spd-needed.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-sata-down-spd-limit"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sata_down_spd_limit &#8212; 
2     adjust SATA spd limit downward
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sata_down_spd_limit </b>(</code></td><td>struct ata_link * <var class="pdparam">link</var>, </td></tr><tr><td>&#160;</td><td>u32 <var class="pdparam">spd_limit</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124141628"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>link</code></em></span></dt><dd><p>
4     Link to adjust SATA spd limit for
5    </p></dd><dt><span class="term"><em class="parameter"><code>spd_limit</code></em></span></dt><dd><p>
6     Additional limit
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124144164"></a><h2>Description</h2><p>
8   Adjust SATA spd limit of <em class="parameter"><code>link</code></em> downward.  Note that this
9   function only adjusts the limit.  The change must be applied
10   using <code class="function">sata_set_spd</code>.
11   </p><p>
12
13   If <em class="parameter"><code>spd_limit</code></em> is non-zero, the speed is limited to equal to or
14   lower than <em class="parameter"><code>spd_limit</code></em> if such speed is supported.  If
15   <em class="parameter"><code>spd_limit</code></em> is slower than any supported speed, only the lowest
16   supported speed is allowed.
17</p></div><div class="refsect1"><a name="idp1124146796"></a><h2>LOCKING</h2><p>
18   Inherited from caller.
19</p></div><div class="refsect1"><a name="idp1124147372"></a><h2>RETURNS</h2><p>
20   0 on success, negative errno on failure
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