Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755928AbbEURcc (ORCPT ); Thu, 21 May 2015 13:32:32 -0400 Received: from cantor2.suse.de ([195.135.220.15]:39628 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754066AbbEURc3 (ORCPT ); Thu, 21 May 2015 13:32:29 -0400 Date: Thu, 21 May 2015 19:32:25 +0200 Message-ID: From: Takashi Iwai To: Arend van Spriel Cc: Alan Stern , Marcel Holtmann , Laura Abbott , Oliver Neukum , Ming Lei , "David S. Miller" , Laura Abbott , "Johan Hedberg" , "Rafael J. Wysocki" , "Gustavo F. Padovan" , "bluez mailin list (linux-bluetooth@vger.kernel.org)" , Linux Kernel Mailing List , USB list , netdev Subject: Re: [RESEND][PATCH] Bluetooth: Make request workqueue freezable In-Reply-To: <555E158D.4090607@broadcom.com> References: <33C25745-6839-4858-9A3E-19EC6408ECED@holtmann.org> <555E158D.4090607@broadcom.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/24.5 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1629 Lines: 45 At Thu, 21 May 2015 19:27:41 +0200, Arend van Spriel wrote: > > On 05/21/15 17:35, Takashi Iwai wrote: > > At Thu, 21 May 2015 11:26:17 -0400 (EDT), > > Alan Stern wrote: > >> > >> On Thu, 21 May 2015, Takashi Iwai wrote: > >> > >>> At Thu, 21 May 2015 10:18:08 -0400 (EDT), > >>> Alan Stern wrote: > >>>> > >>>> On Thu, 21 May 2015, Takashi Iwai wrote: > >>>> > >>>>> Then avoiding the failed firmware is no solution, indeed. > >>>>> If it's a new probe, it should be never executed during resume. > >>>> > >>>> Can you expand this comment? What's wrong with probing during resume? > >>> > >>> Well, if the probe requires the access to a user-space file, it can't > >>> be done during resume. That's the very problem we're seeing now. > >>> The firmware loader can't help much alone if it's a new device > >>> object. > >> > >> But the same thing happens during early boot, if the driver is built > >> into the kernel. When the probe occurs, userspace isn't up and running > >> yet, so the firmware loader can't do anything. > >> > >> Why should probe during resume be any worse than probe during early > >> boot? > > > > The early boot has initrd, so the files can be there. But the resume > > has no way to fetch the file except for cached data. > > but initrd is optional so without initrd it is pretty much the same. User can build the firmware into the kernel. Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/