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Thu, 20 Feb 2025 01:19:16 -0800 (PST) Received: from DC5-EXCH05.marvell.com (10.69.176.209) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 20 Feb 2025 01:19:15 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Thu, 20 Feb 2025 01:19:15 -0800 Received: from maili.marvell.com (unknown [10.28.36.165]) by maili.marvell.com (Postfix) with SMTP id BE6253F7058; Thu, 20 Feb 2025 01:19:05 -0800 (PST) Date: Thu, 20 Feb 2025 14:49:04 +0530 From: Ratheesh Kannoth To: parvathi Subject: Re: [PATCH net-next v3 02/10] net: ti: prueth: Adds ICSSM Ethernet driver Message-ID: <20250220091904.GA1230612@maili.marvell.com> References: <20250214054702.1073139-1-parvathi@couthit.com> <20250214054702.1073139-3-parvathi@couthit.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250214054702.1073139-3-parvathi@couthit.com> X-Proofpoint-ORIG-GUID: PTTJNwmlFUm2mcEocC2aGHWKxK5J707q X-Proofpoint-GUID: PTTJNwmlFUm2mcEocC2aGHWKxK5J707q X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-20_03,2025-02-20_02,2024-11-22_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250220_012127_136193_529E4334 X-CRM114-Status: GOOD ( 21.11 ) 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: , Cc: nm@ti.com, vigneshr@ti.com, praneeth@ti.com, edumazet@google.com, krishna@couthit.com, pmohan@couthit.com, diogo.ivo@siemens.com, robh@kernel.org, javier.carrasco.cruz@gmail.com, m-karicheri2@ti.com, basharath@couthit.com, kuba@kernel.org, pabeni@redhat.com, devicetree@vger.kernel.org, conor+dt@kernel.org, schnelle@linux.ibm.com, mohan@couthit.com, richardcochran@gmail.com, prajith@ti.com, rogerq@kernel.org, jacob.e.keller@intel.com, ssantosh@kernel.org, linux-arm-kernel@lists.infradead.org, rogerq@ti.com, srk@ti.com, pratheesh@ti.com, m-malladi@ti.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, danishanwar@ti.com, afd@ti.com, andrew+netdev@lunn.ch, horms@kernel.org, krzk+dt@kernel.org, davem@davemloft.net Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2025-02-14 at 11:16:54, parvathi (parvathi@couthit.com) wrote: > From: Roger Quadros > > +static int icssm_prueth_probe(struct platform_device *pdev) > +{ > + struct device_node *eth0_node = NULL, *eth1_node = NULL; > + struct device_node *eth_node, *eth_ports_node; > + enum pruss_pru_id pruss_id0, pruss_id1; > + struct device *dev = &pdev->dev; > + struct device_node *np; > + struct prueth *prueth; > + int i, ret; > + > + np = dev->of_node; > + if (!np) > + return -ENODEV; /* we don't support non DT */ > + > + prueth = devm_kzalloc(dev, sizeof(*prueth), GFP_KERNEL); > + if (!prueth) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, prueth); > + prueth->dev = dev; > + prueth->fw_data = device_get_match_data(dev); > + > + eth_ports_node = of_get_child_by_name(np, "ethernet-ports"); > + if (!eth_ports_node) > + return -ENOENT; > + > + for_each_child_of_node(eth_ports_node, eth_node) { > + u32 reg; > + > + if (strcmp(eth_node->name, "ethernet-port")) > + continue; > + ret = of_property_read_u32(eth_node, "reg", ®); > + if (ret < 0) { > + dev_err(dev, "%pOF error reading port_id %d\n", > + eth_node, ret); > + } > + > + of_node_get(eth_node); > + > + if (reg == 0) { > + eth0_node = eth_node; > + if (!of_device_is_available(eth0_node)) { > + of_node_put(eth0_node); > + eth0_node = NULL; > + } > + } else if (reg == 1) { > + eth1_node = eth_node; > + if (!of_device_is_available(eth1_node)) { > + of_node_put(eth1_node); > + eth1_node = NULL; > + } It depends on your DT, but is there any chance that more than once, we reach here in else case. { if (of_device_is_availabke(...) } ? > + } else { > + dev_err(dev, "port reg should be 0 or 1\n"); > + } > + } > + > + of_node_put(eth_ports_node); > + > + /* At least one node must be present and available else we fail */ > + if (!eth0_node && !eth1_node) { > + dev_err(dev, "neither port0 nor port1 node available\n"); > + return -ENODEV; > + } > + > + if (eth0_node == eth1_node) { > + dev_err(dev, "port0 and port1 can't have same reg\n"); > + of_node_put(eth0_node); > + return -ENODEV; > + } > + > + prueth->eth_node[PRUETH_MAC0] = eth0_node; > + prueth->eth_node[PRUETH_MAC1] = eth1_node; ... + > + if (eth0_node) { > + prueth->pru0 = pru_rproc_get(np, 0, &pruss_id0); > + if (IS_ERR(prueth->pru0)) { > + ret = PTR_ERR(prueth->pru0); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, "unable to get PRU0: %d\n", ret); > + goto put_pru; > + } > + } > + > + if (eth1_node) { > + prueth->pru1 = pru_rproc_get(np, 1, &pruss_id1); > + if (IS_ERR(prueth->pru1)) { > + ret = PTR_ERR(prueth->pru1); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, "unable to get PRU1: %d\n", ret); > + goto put_pru; > + } > + } > + > + /* setup netdev interfaces */ > + if (eth0_node) { > + ret = icssm_prueth_netdev_init(prueth, eth0_node); > + if (ret) { > + if (ret != -EPROBE_DEFER) { > + dev_err(dev, "netdev init %s failed: %d\n", > + eth0_node->name, ret); > + } > + goto put_pru; > + } > + } > + > + if (eth1_node) { > + ret = icssm_prueth_netdev_init(prueth, eth1_node); > + if (ret) { > + if (ret != -EPROBE_DEFER) { > + dev_err(dev, "netdev init %s failed: %d\n", > + eth1_node->name, ret); > + } > + goto netdev_exit; > + } > + } > + > + /* register the network devices */ > + if (eth0_node) { > + ret = register_netdev(prueth->emac[PRUETH_MAC0]->ndev); > + if (ret) { > + dev_err(dev, "can't register netdev for port MII0"); > + goto netdev_exit; > + } > + > + prueth->registered_netdevs[PRUETH_MAC0] = > + prueth->emac[PRUETH_MAC0]->ndev; > + } > + > + if (eth1_node) { > + ret = register_netdev(prueth->emac[PRUETH_MAC1]->ndev); > + if (ret) { > + dev_err(dev, "can't register netdev for port MII1"); > + goto netdev_unregister; > + } > + > + prueth->registered_netdevs[PRUETH_MAC1] = > + prueth->emac[PRUETH_MAC1]->ndev; > + } > + > + if (eth1_node) > + of_node_put(eth1_node); > + if (eth0_node) > + of_node_put(eth0_node); nit: A function would be better than code duplication for eth0_node and eth1_node ? > + return 0; > + > +netdev_unregister: > + for (i = 0; i < PRUETH_NUM_MACS; i++) { > + if (!prueth->registered_netdevs[i]) > + continue; > + unregister_netdev(prueth->registered_netdevs[i]); > + } > + > +netdev_exit: > + for (i = 0; i < PRUETH_NUM_MACS; i++) { > + eth_node = prueth->eth_node[i]; > + if (!eth_node) > + continue; > + > + icssm_prueth_netdev_exit(prueth, eth_node); > + } > + > +put_pru: > + if (eth1_node) { > + if (prueth->pru1) > + pru_rproc_put(prueth->pru1); > + of_node_put(eth1_node); > + } > + > + if (eth0_node) { > + if (prueth->pru0) > + pru_rproc_put(prueth->pru0); > + of_node_put(eth0_node); > + } > + > + return ret; > +} > +