From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268016AbUHEWfG (ORCPT ); Thu, 5 Aug 2004 18:35:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268002AbUHEWdk (ORCPT ); Thu, 5 Aug 2004 18:33:40 -0400 Received: from mail5.tpgi.com.au ([203.12.160.101]:50338 "EHLO mail5.tpgi.com.au") by vger.kernel.org with ESMTP id S268000AbUHEWcK (ORCPT ); Thu, 5 Aug 2004 18:32:10 -0400 Subject: Re: Solving suspend-level confusion From: Nigel Cunningham Reply-To: ncunningham@linuxmail.org To: Benjamin Herrenschmidt Cc: David Brownell , Oliver Neukum , Pavel Machek , Linux Kernel Mailing List , Patrick Mochel In-Reply-To: <1091595811.5226.105.camel@gaston> References: <20040730164413.GB4672@elf.ucw.cz> <200408020938.17593.david-b@pacbell.net> <1091493486.7396.92.camel@gaston> <200408031928.08475.david-b@pacbell.net> <1091586381.3189.14.camel@laptop.cunninghams> <1091587985.5226.74.camel@gaston> <1091587929.3303.38.camel@laptop.cunninghams> <1091592870.5226.80.camel@gaston> <1091593555.3191.48.camel@laptop.cunninghams> <1091595125.5227.96.camel@gaston> <1091595258.3303.74.camel@laptop.cunninghams> <1091595811.5226.105.camel@gaston> Content-Type: text/plain Message-Id: <1091745102.2530.24.camel@laptop.cunninghams> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6-1mdk Date: Fri, 06 Aug 2004 08:31:43 +1000 Content-Transfer-Encoding: 7bit X-TPG-Antivirus: Passed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi again. On Wed, 2004-08-04 at 15:03, Benjamin Herrenschmidt wrote: > That's where the whole confusion is indeed... and why we need to make > that clear. The IDE driver will sleep the disk for 3 and keep it spinning > for 4 Okay. So that leaves me calling device_suspend(4) when I want to quiesce the driver but not spin down and device_suspend(3) when I want to power down. Does that sound right? It sounds hairy to me. (Do other drivers treat 3 and 4 in the same way?) Nigel