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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B578C433F5 for ; Mon, 30 May 2022 11:41:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235681AbiE3LlE (ORCPT ); Mon, 30 May 2022 07:41:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235496AbiE3LlB (ORCPT ); Mon, 30 May 2022 07:41:01 -0400 X-Greylist: delayed 121 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 30 May 2022 04:40:57 PDT Received: from mail1.perex.cz (mail1.perex.cz [77.48.224.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 184EF419A3 for ; Mon, 30 May 2022 04:40:57 -0700 (PDT) Received: from mail1.perex.cz (localhost [127.0.0.1]) by smtp1.perex.cz (Perex's E-mail Delivery System) with ESMTP id 981BBA0046; Mon, 30 May 2022 13:40:55 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.perex.cz 981BBA0046 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=perex.cz; s=default; t=1653910855; bh=A94usJLEIZvHxs0NLWIgXXMYLwbbDmxswIagNBme1fA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=aqO3x3TZZmEChRN+9pBFGi42ZbmxIRT6l6Fv3SLOfOaU5XUHs41fyYweMmKlfB+DD 3CJVPNlYi7SWJa9Y+sr46OsbSYUvH35X6fLHGKqDwAV5QJ67Jusl4Q5iubQlwTJWSt zAHbudEDy7ZCqBnOxh8lzjWkK2QAsOcavsjm84dE= Received: from [192.168.100.98] (unknown [192.168.100.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: perex) by mail1.perex.cz (Perex's E-mail Delivery System) with ESMTPSA; Mon, 30 May 2022 13:40:47 +0200 (CEST) Message-ID: <7ca20354-1a91-8f18-2de8-8571987fa519@perex.cz> Date: Mon, 30 May 2022 13:40:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 Subject: Re: [PATCH v4 00/17] ALSA: hda: cirrus: Add initial DSP support and firmware loading Content-Language: en-US To: Takashi Iwai , Charles Keepax Cc: Vitaly Rodionov , Takashi Iwai , Mark Brown , alsa-devel@alsa-project.org, patches@opensource.cirrus.com, linux-kernel@vger.kernel.org References: <20220525131638.5512-1-vitalyr@opensource.cirrus.com> <871qwf0x8t.wl-tiwai@suse.de> <20220530090846.GS38351@ediswmail.ad.cirrus.com> <87czfvxtsc.wl-tiwai@suse.de> <20220530093639.GT38351@ediswmail.ad.cirrus.com> <87a6azxr7h.wl-tiwai@suse.de> <20220530103415.GU38351@ediswmail.ad.cirrus.com> <871qwbxpsb.wl-tiwai@suse.de> <20220530105329.GV38351@ediswmail.ad.cirrus.com> <87wne3wa5w.wl-tiwai@suse.de> From: Jaroslav Kysela In-Reply-To: <87wne3wa5w.wl-tiwai@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30. 05. 22 13:07, Takashi Iwai wrote: > And yet moreover, we'll need to consider some way for protecting > against DoS-like behavior by frequent kctl changes. I agree, but only the driver knows details about the kctl operation time and resource constraints. So the driver should implement a rate or i/o limit for those controls. We may offer helper functions in the ALSA core for this job (if required). Jaroslav -- Jaroslav Kysela Linux Sound Maintainer; ALSA Project; Red Hat, Inc.