From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C022EC433E0 for ; Wed, 13 Jan 2021 11:56:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71A3A233F7 for ; Wed, 13 Jan 2021 11:56:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727136AbhAMLzl (ORCPT ); Wed, 13 Jan 2021 06:55:41 -0500 Received: from mx2.suse.de ([195.135.220.15]:58648 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726985AbhAMLzj (ORCPT ); Wed, 13 Jan 2021 06:55:39 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E009EAD29; Wed, 13 Jan 2021 11:54:57 +0000 (UTC) Date: Wed, 13 Jan 2021 12:54:57 +0100 Message-ID: From: Takashi Iwai To: Pavel Machek Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Christian Labisch Subject: Re: [PATCH 4.19 67/77] ALSA: hda/via: Fix runtime PM for Clevo W35xSS In-Reply-To: <20210113114934.GB2843@duo.ucw.cz> References: <20210111130036.414620026@linuxfoundation.org> <20210111130039.628452970@linuxfoundation.org> <20210113114934.GB2843@duo.ucw.cz> 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/25.3 (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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 13 Jan 2021 12:49:34 +0100, Pavel Machek wrote: > > Hi! > > > From: Takashi Iwai > > > > commit 4bfd6247fa9164c8e193a55ef9c0ea3ee22f82d8 upstream. > > > > Clevo W35xSS_370SS with VIA codec has had the runtime PM problem that > > looses the power state of some nodes after the runtime resume. This > > was worked around by disabling the default runtime PM via a denylist > > entry. Since 5.10.x made the runtime PM applied (casually) even > > though it's disabled in the denylist, this problem was revisited. The > > result was that disabling power_save_node feature suffices for the > > runtime PM problem. > > From changelog it looks like we do not need this for 4.19. The patch fixes the runtime PM problem that has existed for long time, and that's the root cause of the issue mentioned in the Fixes tag (that just papered over), so it still makes sense to backport as long as it can be applied. thanks, Takashi