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(93-34-88-103.ip49.fastwebnet.it. [93.34.88.103]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490ea9563b8sm223213855e9.2.2026.06.15.07.10.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 07:10:22 -0700 (PDT) Message-ID: <6a3007ce.73de60af.3a056d.d903@mx.google.com> X-Google-Original-Message-ID: Date: Mon, 15 Jun 2026 16:10:18 +0200 From: Christian Marangi To: Maxime Chevallier Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Simon Horman , Jonathan Corbet , Shuah Khan , Lorenzo Bianconi , Heiner Kallweit , Russell King , Saravana Kannan , Philipp Zabel , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, llvm@lists.linux.dev Subject: Re: [PATCH net-next v7 05/12] net: phylink: support late PCS provider attach References: <20260615122950.22281-1-ansuelsmth@gmail.com> <20260615122950.22281-6-ansuelsmth@gmail.com> <867a39de-ccc2-4dcf-be24-ab2542d20ab6@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <867a39de-ccc2-4dcf-be24-ab2542d20ab6@bootlin.com> On Mon, Jun 15, 2026 at 04:07:03PM +0200, Maxime Chevallier wrote: > Hi Christian, > > On 6/15/26 14:29, Christian Marangi wrote: > > Add support for late PCS provider attachment to a phylink instance. > > This works by creating a global notifier for the PCS provider and > > making each phylink instance that makes use of fwnode subscribe to > > this notifier. > > > > The PCS notifier will emit the event FWNODE_PCS_PROVIDER_ADD every time > > a new PCS provider is added. > > > > phylink will then react to this event and will call the new function > > fwnode_phylink_pcs_get_from_fwnode() that will check if the PCS fwnode > > provided by the event is present in the pcs-handle property of the > > phylink instance. > > > > If a related PCS is found, then such PCS is added to the phylink > > instance PCS list. > > > > Then we link the PCS to the phylink instance and we refresh the supported > > interfaces of the phylink instance. > > > > Finally we check if we are in a major_config_failed scenario and trigger > > an interface reconfiguration in the next phylink resolve. > > > > In the example scenario where the link was previously torn down due to > > removal of PCS, the link will be established again as the PCS came back > > and is now available to phylink. > > > > Signed-off-by: Christian Marangi > > --- > > [...] > > > @@ -2151,6 +2204,10 @@ void phylink_destroy(struct phylink *pl) > > if (pl->link_gpio) > > gpiod_put(pl->link_gpio); > > > > + /* Unregister notifier for late PCS attach */ > > + if (pl->fwnode_pcs_nb.notifier_call) > > + unregister_fwnode_pcs_notifier(&pl->fwnode_pcs_nb); > > I wanted to try this out, but I get : > > drivers/net/phy/phylink.c:2218:17: error: implicit declaration of function ‘unregister_fwnode_pcs_notifier’; did you mean ‘register_fwnode_pcs_notifier’? [-Werror=implicit-function-declaration] > 2218 | unregister_fwnode_pcs_notifier(&pl->fwnode_pcs_nb); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > | register_fwnode_pcs_notifier > > I guess you either need to stub this, or there's a missing Kconfig > dependency somewhere > Hi yes if you want toi test just enable CONFIG_FWNODE_PCS. I forgot to add the static declaration for unregister_fwnode_pcs_notifier. -- Ansuel