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Miller" , Eric Dumazet , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Qiang Zhao , Li Yang , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Christophe Leroy , Randy Dunlap , netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, Simon Horman , Christophe JAILLET , Thomas Petazzoni Subject: Re: [PATCH v7 24/30] net: wan: Add framer framework support Message-ID: <20231006150810.09e2c1a9@kernel.org> In-Reply-To: <20230928070652.330429-25-herve.codina@bootlin.com> References: <20230928070652.330429-1-herve.codina@bootlin.com> <20230928070652.330429-25-herve.codina@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231006_150813_607599_CBF645A2 X-CRM114-Status: GOOD ( 17.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 28 Sep 2023 09:06:42 +0200 Herve Codina wrote: > +menu "Framer Subsystem" > + > +config GENERIC_FRAMER > + bool "Framer Core" > + help > + Generic Framer support. > + A framer is a component in charge of an E1/T1 line interface. > + Connected usually to a TDM bus, it converts TDM frames to/from E1/T1 > + frames. It also provides information related to the E1/T1 line. > + Used with HDLC, the network can be reached through the E1/T1 line. > + > + This framework is designed to provide a generic interface for framer > + devices present in the kernel. This layer will have the generic > + API by which framer drivers can create framer using the framer > + framework and framer users can obtain reference to the framer. > + All the users of this framework should select this config. maybe make the menu a menuconfig with info about framers but hide the GENERIC_FRAMER symbol? The driver 'select' it anyway, what's the point of prompting the user.. > + if (WARN_ON(!dev)) > + return ERR_PTR(-EINVAL); no defensive programming, let the kernel crash > + ret = framer_pm_runtime_get_sync(framer); > + if (ret < 0 && ret != -EOPNOTSUPP) > + goto err_pm_sync; > + > + ret = 0; /* Override possible ret == -EOPNOTSUPP */ This looks pointless given that ret is either overwritten or not used later on > + mutex_lock(&framer->mutex); > + if (framer->power_count == 0 && framer->ops->power_on) { > + ret = framer->ops->power_on(framer); > + if (ret < 0) { > + dev_err(&framer->dev, "framer poweron failed --> %d\n", ret); > + goto err_pwr_on; > + } > + } > + ++framer->power_count; > + mutex_unlock(&framer->mutex); > + return 0; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel