From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757642AbaDXO1H (ORCPT ); Thu, 24 Apr 2014 10:27:07 -0400 Received: from mail-qc0-f179.google.com ([209.85.216.179]:34976 "EHLO mail-qc0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757585AbaDXO1D (ORCPT ); Thu, 24 Apr 2014 10:27:03 -0400 Date: Thu, 24 Apr 2014 10:26:58 -0400 From: Tejun Heo To: Jacob Pan Cc: linux-ide@vger.kernel.org, LKML , Alan Cox , Dan Williams , Kristen Carlson Accardi Subject: Re: [PATCH v2] ahci: disable DEVSLP for Intel Valleyview Message-ID: <20140424142658.GA14460@htj.dyndns.org> References: <1397626031-4064-1-git-send-email-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1397626031-4064-1-git-send-email-jacob.jun.pan@linux.intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 15, 2014 at 10:27:11PM -0700, Jacob Pan wrote: > On Intel Valleyview SoC, SATA device sleep is not reliable. When > DEVSLP is attempted on certain SSDs, port_devslp write would fail > and result in malfunction of AHCI controller. AHCI controller may > be not shown in PCI enumeration after reset. Complete power source > removal may be required to recover from this failure. So we blacklist > this device and override host device reported capabilities such that > device LPM will only attempt slumber but not DEVSLP. > > Signed-off-by: Jacob Pan > Acked-by: Dan Williams Applied to libata/for-3.15-fixes. Thanks. -- tejun