From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH] ahci: Add support for EEH error recovery Date: Thu, 14 May 2015 11:13:31 -0400 Message-ID: <20150514151331.GI11388@htj.duckdns.org> References: <1431567319-3380-1-git-send-email-wenxiong@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-qk0-f180.google.com ([209.85.220.180]:36834 "EHLO mail-qk0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932382AbbENPNf (ORCPT ); Thu, 14 May 2015 11:13:35 -0400 Received: by qkgw4 with SMTP id w4so11003775qkg.3 for ; Thu, 14 May 2015 08:13:34 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1431567319-3380-1-git-send-email-wenxiong@linux.vnet.ibm.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: wenxiong@linux.vnet.ibm.com Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org, bjking1@us.ibm.com, wenxiong@us.ibm.com Hello, Wen. On Wed, May 13, 2015 at 08:35:19PM -0500, wenxiong@linux.vnet.ibm.com wrote: > From: Wen Xiong > > This patch adds the callback functions to support EEH error > recovery in ahci driver. Also adds the code in ahci_error_handler > to issue an MMIO load then check if it is in EEH. If it is in EEH, > ahci_error_handler will wait until EEH recovery is completed. Can you please explain why we would want this? What does it buy us? Thanks. -- tejun