linux-kernel - Re: [PATCH net-next 05/12] dpll: Add notifier chain for dpll events

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Message-ID: <67ec1ef6-4148-42d8-a37d-56d089c6d686@linux.dev>
Date: Fri, 9 Jan 2026 16:12:18 +0000
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Ivan Vecera <ivecera@...hat.com>, netdev@...r.kernel.org
Cc: Petr Oros <poros@...hat.com>,
 Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
 Jiri Pirko <jiri@...nulli.us>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Prathosh Satish <Prathosh.Satish@...rochip.com>,
 Tony Nguyen <anthony.l.nguyen@...el.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Tariq Toukan <tariqt@...dia.com>, Mark Bloch <mbloch@...dia.com>,
 Jonathan Lemon <jonathan.lemon@...il.com>,
 Richard Cochran <richardcochran@...il.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 intel-wired-lan@...ts.osuosl.org, linux-rdma@...r.kernel.org,
 Michal Schmidt <mschmidt@...hat.com>,
 Grzegorz Nitka <grzegorz.nitka@...el.com>
Subject: Re: [PATCH net-next 05/12] dpll: Add notifier chain for dpll events

On 08/01/2026 18:23, Ivan Vecera wrote:
> From: Petr Oros <poros@...hat.com>
> 
> Currently, the DPLL subsystem reports events (creation, deletion, changes)
> to userspace via Netlink. However, there is no mechanism for other kernel
> components to be notified of these events directly.
> 
> Add a raw notifier chain to the DPLL core protected by dpll_lock. This
> allows other kernel subsystems or drivers to register callbacks and
> receive notifications when DPLL devices or pins are created, deleted,
> or modified.
> 
> Define the following:
> - Registration helpers: {,un}register_dpll_notifier()
> - Event types: DPLL_DEVICE_CREATED, DPLL_PIN_CREATED, etc.
> - Context structures: dpll_{device,pin}_notifier_info  to pass relevant
>    data to the listeners.
> 
> The notification chain is invoked alongside the existing Netlink event
> generation to ensure in-kernel listeners are kept in sync with the
> subsystem state.
> 
> Co-developed-by: Ivan Vecera <ivecera@...hat.com>
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> Signed-off-by: Petr Oros <poros@...hat.com>

LGTM, Thanks!

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>