linux-kernel - Re: [PATCH V4 1/8] drivers/acpi: Add support for Wifi band RF mitigations

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Message-ID: <08dd8d17-6825-4e53-8441-85c709326f48@lunn.ch>
Date:   Wed, 21 Jun 2023 21:25:20 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     "Limonciello, Mario" <mario.limonciello@....com>
Cc:     Johannes Berg <johannes@...solutions.net>,
        Evan Quan <evan.quan@....com>, rafael@...nel.org,
        lenb@...nel.org, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, mdaenzer@...hat.com,
        maarten.lankhorst@...ux.intel.com, tzimmermann@...e.de,
        hdegoede@...hat.com, jingyuwang_vip@....com, lijo.lazar@....com,
        jim.cromie@...il.com, bellosilicio@...il.com,
        andrealmeid@...lia.com, trix@...hat.com, jsg@....id.au,
        arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH V4 1/8] drivers/acpi: Add support for Wifi band RF
 mitigations

> ACPI core does has notifiers that are used, but they don't work the same.
> If you look at patch 4, you'll see amdgpu registers and unregisters using
> both
> 
> acpi_install_notify_handler()
> and
> acpi_remove_notify_handler()
> 
> If we supported both ACPI notifications and non-ACPI notifications
> all consumers would have to have support to register and use both types.

Why would you want to support ACPI notifications and non-ACPI
notifications? All you need is wbrf notification.

The new wbrf.c should implement wbrf_install_notify_handler() and
wbrf_remove_notify_handler().

As to where to put wbrf.c? I guess either drivers/base/ or
drivers/wbrf/. Maybe ask GregKH?

   Andrew