From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759895AbXGDKxm (ORCPT ); Wed, 4 Jul 2007 06:53:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756976AbXGDKxd (ORCPT ); Wed, 4 Jul 2007 06:53:33 -0400 Received: from smtp-out001.kontent.com ([81.88.40.215]:39057 "EHLO smtp-out.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755534AbXGDKxc (ORCPT ); Wed, 4 Jul 2007 06:53:32 -0400 From: Oliver Neukum To: Paul Mackerras Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway Date: Wed, 4 Jul 2007 12:53:32 +0200 User-Agent: KMail/1.9.7 Cc: linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Matthew Garrett References: <20070703042916.GA17240@srcf.ucam.org> <200707041208.40735.oliver@neukum.org> <18059.31346.806801.871454@cargo.ozlabs.ibm.com> In-Reply-To: <18059.31346.806801.871454@cargo.ozlabs.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200707041253.33154.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Mittwoch, 4. Juli 2007 schrieb Paul Mackerras: > Oliver Neukum writes: > > > You cannot simply restart the URB without thinking. > > The device after resumption may or may not be in the stage > > you left it. It needs to be rechecked and some settings must be > > renewed. You cannot simple throw an URB from an arbitrary > > stage of the protocol at it. > > Suspension of devices can only happen at some points > > in the protocol. > > Yeah, and? > > I said "the higher-level driver needs to do the sensible thing". They can't. Device specific protocols are known to the drivers only. The fact remains, remove the freezer and you need to go through all drivers. Oliver