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Date:   Mon, 30 May 2022 13:40:47 +0200
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Subject: Re: [PATCH v4 00/17] ALSA: hda: cirrus: Add initial DSP support and
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To:     Takashi Iwai <tiwai@suse.de>,
        Charles Keepax <ckeepax@opensource.cirrus.com>
Cc:     Vitaly Rodionov <vitalyr@opensource.cirrus.com>,
        Takashi Iwai <tiwai@suse.com>, Mark Brown <broonie@kernel.org>,
        alsa-devel@alsa-project.org, patches@opensource.cirrus.com,
        linux-kernel@vger.kernel.org
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From:   Jaroslav Kysela <perex@perex.cz>
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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 <perex@perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.