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[209.132.180.67]) by mx.google.com with ESMTP id x23si390358pfh.355.2018.03.19.12.01.30; Mon, 19 Mar 2018 12:01:45 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S970679AbeCSS7u (ORCPT + 99 others); Mon, 19 Mar 2018 14:59:50 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:52572 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031792AbeCSS3E (ORCPT ); Mon, 19 Mar 2018 14:29:04 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 4148910A7; Mon, 19 Mar 2018 18:29:04 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Takashi Iwai Subject: [PATCH 4.9 223/241] ALSA: hda - Revert power_save option default value Date: Mon, 19 Mar 2018 19:08:08 +0100 Message-Id: <20180319180800.405889647@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180319180751.172155436@linuxfoundation.org> References: <20180319180751.172155436@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai commit 40088dc4e1ead7df31728c73f5b51d71da18831d upstream. With the commit 1ba8f9d30817 ("ALSA: hda: Add a power_save blacklist"), we changed the default value of power_save option to -1 for processing the power-save blacklist. Unfortunately, this seems breaking user-space applications that actually read the power_save parameter value via sysfs and judge / adjust the power-saving status. They see the value -1 as if the power-save is turned off, although the actual value is taken from CONFIG_SND_HDA_POWER_SAVE_DEFAULT and it can be a positive. So, overall, passing -1 there was no good idea. Let's partially revert it -- at least for power_save option default value is restored again to CONFIG_SND_HDA_POWER_SAVE_DEFAULT. Meanwhile, in this patch, we keep the blacklist behavior and make is adjustable via the new option, pm_blacklist. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199073 Fixes: 1ba8f9d30817 ("ALSA: hda: Add a power_save blacklist") Acked-by: Hans de Goede Cc: Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/hda_intel.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -180,11 +180,15 @@ static const struct kernel_param_ops par }; #define param_check_xint param_check_int -static int power_save = -1; +static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT; module_param(power_save, xint, 0644); MODULE_PARM_DESC(power_save, "Automatic power-saving timeout " "(in second, 0 = disable)."); +static bool pm_blacklist = true; +module_param(pm_blacklist, bool, 0644); +MODULE_PARM_DESC(pm_blacklist, "Enable power-management blacklist"); + /* reset the HD-audio controller in power save mode. * this may give more power-saving, but will take longer time to * wake up. @@ -2153,10 +2157,9 @@ static int azx_probe_continue(struct azx val = power_save; #ifdef CONFIG_PM - if (val == -1) { + if (pm_blacklist) { const struct snd_pci_quirk *q; - val = CONFIG_SND_HDA_POWER_SAVE_DEFAULT; q = snd_pci_quirk_lookup(chip->pci, power_save_blacklist); if (q && val) { dev_info(chip->card->dev, "device %04x:%04x is on the power_save blacklist, forcing power_save to 0\n",