Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758635AbYFFOjb (ORCPT ); Fri, 6 Jun 2008 10:39:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756116AbYFFOjX (ORCPT ); Fri, 6 Jun 2008 10:39:23 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:40031 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752137AbYFFOjX (ORCPT ); Fri, 6 Jun 2008 10:39:23 -0400 Date: Fri, 6 Jun 2008 10:39:19 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Pavel Machek cc: gregkh@suse.de, Andrew Morton , kernel list , Oliver Neukum Subject: Re: 2.6.25-rc6: CONFIG_USB_PERSIST forced on In-Reply-To: <20080606092546.GA2596@elf.ucw.cz> Message-ID: MIME-Version: 1.0 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: 1506 Lines: 40 On Fri, 6 Jun 2008, Pavel Machek wrote: > Hi! > > In 2.6.26-rc5, > > -config USB_PERSIST > - bool "USB device persistence during system suspend (DANGEROUS)" > > is now on. Given that it was previously marked "DANGEROUS", that seems > quite a change to me. It is. Basically I did it because Linus asked for it -- or at least, for something like it. He felt that the danger of not having USB_PERSIST when you need it is worse than the danger of having it when you don't want it. > Besides, it seems to have broken usblp hibernation support, and maybe > other devices that does not have reset_resume() present. (Big thanks > for Oliver for doing investigation). URL? It's hard to see how lack of reset-resume support would mess anything up worse than it would be without USB_PERSIST. > [Or is it that now USB_PERSIST is conditional on /sys fs setting, so > while setting it on individual device is dangerous, it is still N by > default? Changelog does not tell me...?] USB_PERSIST is (and has always been) conditional on the power/persist sysfs attribute setting. The difference is that now the setting starts out as On whereas before it started out as Off, and there no longer is a Kconfig option to remove USB_PERSIST entirely. Alan Stern -- 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/