linux-kernel - Re: [PATCH 4/4] media: uvcvideo: Introduce allow_privacy

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Message-ID: <f922a8271624a6ae765abbf9894867007a29c8e7.camel@irl.hu>
Date: Mon, 17 Nov 2025 22:10:53 +0100
From: Gergo Koteles <soyer@....hu>
To: Ricardo Ribalda <ribalda@...omium.org>,
  Laurent Pinchart <laurent.pinchart@...asonboard.com>,
  Hans de Goede <hansg@...nel.org>,
  Mauro Carvalho Chehab <mchehab@...nel.org>,
  Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
  linux-usb@...r.kernel.org
Subject: Re: [PATCH 4/4] media: uvcvideo: Introduce allow_privacy_override

Hi Ricardo,

On Mon, 2025-11-17 at 20:14 +0000, Ricardo Ribalda wrote:
> +	if (uvc_is_privacy_mapping(xmap) && !uvc_allow_privacy_override_param) {
> +		pr_warn_once("uvcvideo: Privacy related controls can only be mapped if param allow_privacy_override is true\n");
> +		return -EINVAL;
> +	}
> +

To really prevent the LED from being turned off, it should also be
added to uvc_xu_ctrl_query.

But why has it become so important after 10+ years that it cannot be
turned off on Linux? What has changed?
The majority of users use open-source software, they can view the
source at any time.


Gergo