From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: Does ICH9M support eSATA Port Multiplier? Date: Sat, 31 Oct 2009 11:02:29 -0600 Message-ID: <4AEC6DA5.9090603@gmail.com> References: <4AE9EEA3.1040404@aon.at> <4AEA2D16.50701@gmail.com> <4AEB6458.20401@aon.at> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-yw0-f202.google.com ([209.85.211.202]:38030 "EHLO mail-yw0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932373AbZJaRC2 (ORCPT ); Sat, 31 Oct 2009 13:02:28 -0400 Received: by ywh40 with SMTP id 40so3492290ywh.33 for ; Sat, 31 Oct 2009 10:02:33 -0700 (PDT) In-Reply-To: <4AEB6458.20401@aon.at> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Peter Klotz Cc: linux-ide@vger.kernel.org On 10/30/2009 04:10 PM, Peter Klotz wrote: > Robert Hancock wrote: >>> Can I enable it somehow maybe by using a module option? >> >> No module parameter for that, you'd have to hack the code in ahci.c to >> force the option on. No guarantees it's going to work if the >> controller doesn't report the capability, though. > > Could you please give me a hint what to change in ahci.c? > > I would like to try and see what happens. Based on the version in Linus' git, you'd likely want to add to ahci_save_initial_config something like: cap |= HOST_CAP_PMP; > > Could such a hack damage the hardware? Not likely. It's not impossible that data loss could result though, better back up important files first..