From patchwork Fri Sep 20 19:20:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mugunthan V N X-Patchwork-Id: 2920361 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 3A319BFF05 for ; Fri, 20 Sep 2013 19:22:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F19DF202A1 for ; Fri, 20 Sep 2013 19:22:15 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 79E962018C for ; Fri, 20 Sep 2013 19:22:14 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VN6H7-0002Oy-D5; Fri, 20 Sep 2013 19:21:57 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VN6Gz-0002qb-IY; Fri, 20 Sep 2013 19:21:49 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VN6Go-0002nt-Rp for linux-arm-kernel@lists.infradead.org; Fri, 20 Sep 2013 19:21:41 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r8KJLE88016838; Fri, 20 Sep 2013 14:21:14 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id r8KJLE2D023727; Fri, 20 Sep 2013 14:21:14 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.2.342.3; Fri, 20 Sep 2013 14:21:14 -0500 Received: from mugunthan-lt.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id r8KJL30E023726; Fri, 20 Sep 2013 14:21:09 -0500 From: Mugunthan V N To: Subject: [net-next PATCH 1/4] net: ethernet: cpsw: switch to devres allocations Date: Sat, 21 Sep 2013 00:50:38 +0530 Message-ID: <1379704841-32693-2-git-send-email-mugunthanvnm@ti.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1379704841-32693-1-git-send-email-mugunthanvnm@ti.com> References: <1379704841-32693-1-git-send-email-mugunthanvnm@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130920_152139_188774_39723C8C X-CRM114-Status: GOOD ( 14.25 ) X-Spam-Score: -7.6 (-------) Cc: devicetree@vger.kernel.org, Mugunthan V N , tony@atomide.com, zonque@gmail.com, bcousson@baylibre.com, linux-omap@vger.kernel.org, davem@davemloft.net, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Mack This patch cleans up the allocation and error unwind paths, which allows us to carry less information in struct cpsw_priv and reduce the amount of jump labels in the probe functions. Signed-off-by: Daniel Mack Signed-off-by: Mugunthan V N --- drivers/net/ethernet/ti/cpsw.c | 153 ++++++++++++----------------------------- 1 file changed, 43 insertions(+), 110 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 79974e3..01c42e1 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -367,8 +367,6 @@ struct cpsw_priv { spinlock_t lock; struct platform_device *pdev; struct net_device *ndev; - struct resource *cpsw_res; - struct resource *cpsw_wr_res; struct napi_struct napi; struct device *dev; struct cpsw_platform_data data; @@ -1712,62 +1710,55 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, if (of_property_read_u32(node, "active_slave", &prop)) { pr_err("Missing active_slave property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->active_slave = prop; if (of_property_read_u32(node, "cpts_clock_mult", &prop)) { pr_err("Missing cpts_clock_mult property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->cpts_clock_mult = prop; if (of_property_read_u32(node, "cpts_clock_shift", &prop)) { pr_err("Missing cpts_clock_shift property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->cpts_clock_shift = prop; - data->slave_data = kcalloc(data->slaves, sizeof(struct cpsw_slave_data), - GFP_KERNEL); + data->slave_data = devm_kzalloc(&pdev->dev, data->slaves + * sizeof(struct cpsw_slave_data), + GFP_KERNEL); if (!data->slave_data) - return -EINVAL; + return -ENOMEM; if (of_property_read_u32(node, "cpdma_channels", &prop)) { pr_err("Missing cpdma_channels property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->channels = prop; if (of_property_read_u32(node, "ale_entries", &prop)) { pr_err("Missing ale_entries property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->ale_entries = prop; if (of_property_read_u32(node, "bd_ram_size", &prop)) { pr_err("Missing bd_ram_size property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->bd_ram_size = prop; if (of_property_read_u32(node, "rx_descs", &prop)) { pr_err("Missing rx_descs property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->rx_descs = prop; if (of_property_read_u32(node, "mac_control", &prop)) { pr_err("Missing mac_control property in the DT.\n"); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } data->mac_control = prop; @@ -1794,8 +1785,7 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, parp = of_get_property(slave_node, "phy_id", &lenp); if ((parp == NULL) || (lenp != (sizeof(void *) * 2))) { pr_err("Missing slave[%d] phy_id property\n", i); - ret = -EINVAL; - goto error_ret; + return -EINVAL; } mdio_node = of_find_node_by_phandle(be32_to_cpup(parp)); phyid = be32_to_cpup(parp+1); @@ -1825,10 +1815,6 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, } return 0; - -error_ret: - kfree(data->slave_data); - return ret; } static int cpsw_probe_dual_emac(struct platform_device *pdev, @@ -1870,7 +1856,6 @@ static int cpsw_probe_dual_emac(struct platform_device *pdev, priv_sl2->coal_intvl = 0; priv_sl2->bus_freq_mhz = priv->bus_freq_mhz; - priv_sl2->cpsw_res = priv->cpsw_res; priv_sl2->regs = priv->regs; priv_sl2->host_port = priv->host_port; priv_sl2->host_port_regs = priv->host_port_regs; @@ -1914,8 +1899,8 @@ static int cpsw_probe(struct platform_device *pdev) struct cpsw_priv *priv; struct cpdma_params dma_params; struct cpsw_ale_params ale_params; - void __iomem *ss_regs, *wr_regs; - struct resource *res; + void __iomem *ss_regs; + struct resource *res, *ss_res; u32 slave_offset, sliver_offset, slave_size; int ret = 0, i, k = 0; @@ -1951,7 +1936,7 @@ static int cpsw_probe(struct platform_device *pdev) if (cpsw_probe_dt(&priv->data, pdev)) { pr_err("cpsw: platform data missing\n"); ret = -ENODEV; - goto clean_ndev_ret; + goto clean_runtime_disable_ret; } data = &priv->data; @@ -1965,11 +1950,12 @@ static int cpsw_probe(struct platform_device *pdev) memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN); - priv->slaves = kzalloc(sizeof(struct cpsw_slave) * data->slaves, - GFP_KERNEL); + priv->slaves = devm_kzalloc(&pdev->dev, + sizeof(struct cpsw_slave) * data->slaves, + GFP_KERNEL); if (!priv->slaves) { - ret = -EBUSY; - goto clean_ndev_ret; + ret = -ENOMEM; + goto clean_runtime_disable_ret; } for (i = 0; i < data->slaves; i++) priv->slaves[i].slave_num = i; @@ -1977,55 +1963,31 @@ static int cpsw_probe(struct platform_device *pdev) priv->slaves[0].ndev = ndev; priv->emac_port = 0; - priv->clk = clk_get(&pdev->dev, "fck"); + priv->clk = devm_clk_get(&pdev->dev, "fck"); if (IS_ERR(priv->clk)) { - dev_err(&pdev->dev, "fck is not found\n"); + dev_err(priv->dev, "fck is not found\n"); ret = -ENODEV; - goto clean_slave_ret; + goto clean_runtime_disable_ret; } priv->coal_intvl = 0; priv->bus_freq_mhz = clk_get_rate(priv->clk) / 1000000; - priv->cpsw_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!priv->cpsw_res) { - dev_err(priv->dev, "error getting i/o resource\n"); - ret = -ENOENT; - goto clean_clk_ret; - } - if (!request_mem_region(priv->cpsw_res->start, - resource_size(priv->cpsw_res), ndev->name)) { - dev_err(priv->dev, "failed request i/o region\n"); - ret = -ENXIO; - goto clean_clk_ret; - } - ss_regs = ioremap(priv->cpsw_res->start, resource_size(priv->cpsw_res)); - if (!ss_regs) { - dev_err(priv->dev, "unable to map i/o region\n"); - goto clean_cpsw_iores_ret; + ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ss_regs = devm_ioremap_resource(&pdev->dev, ss_res); + if (IS_ERR(ss_regs)) { + ret = PTR_ERR(ss_regs); + goto clean_runtime_disable_ret; } priv->regs = ss_regs; priv->version = __raw_readl(&priv->regs->id_ver); priv->host_port = HOST_PORT_NUM; - priv->cpsw_wr_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (!priv->cpsw_wr_res) { - dev_err(priv->dev, "error getting i/o resource\n"); - ret = -ENOENT; - goto clean_iomap_ret; - } - if (!request_mem_region(priv->cpsw_wr_res->start, - resource_size(priv->cpsw_wr_res), ndev->name)) { - dev_err(priv->dev, "failed request i/o region\n"); - ret = -ENXIO; - goto clean_iomap_ret; - } - wr_regs = ioremap(priv->cpsw_wr_res->start, - resource_size(priv->cpsw_wr_res)); - if (!wr_regs) { - dev_err(priv->dev, "unable to map i/o region\n"); - goto clean_cpsw_wr_iores_ret; + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + priv->wr_regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->wr_regs)) { + ret = PTR_ERR(priv->wr_regs); + goto clean_runtime_disable_ret; } - priv->wr_regs = wr_regs; memset(&dma_params, 0, sizeof(dma_params)); memset(&ale_params, 0, sizeof(ale_params)); @@ -2056,12 +2018,12 @@ static int cpsw_probe(struct platform_device *pdev) slave_size = CPSW2_SLAVE_SIZE; sliver_offset = CPSW2_SLIVER_OFFSET; dma_params.desc_mem_phys = - (u32 __force) priv->cpsw_res->start + CPSW2_BD_OFFSET; + (u32 __force) ss_res->start + CPSW2_BD_OFFSET; break; default: dev_err(priv->dev, "unknown version 0x%08x\n", priv->version); ret = -ENODEV; - goto clean_cpsw_wr_iores_ret; + goto clean_runtime_disable_ret; } for (i = 0; i < priv->data.slaves; i++) { struct cpsw_slave *slave = &priv->slaves[i]; @@ -2089,7 +2051,7 @@ static int cpsw_probe(struct platform_device *pdev) if (!priv->dma) { dev_err(priv->dev, "error initializing dma\n"); ret = -ENOMEM; - goto clean_wr_iomap_ret; + goto clean_runtime_disable_ret; } priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0), @@ -2124,8 +2086,8 @@ static int cpsw_probe(struct platform_device *pdev) while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) { for (i = res->start; i <= res->end; i++) { - if (request_irq(i, cpsw_interrupt, 0, - dev_name(&pdev->dev), priv)) { + if (devm_request_irq(&pdev->dev, i, cpsw_interrupt, 0, + dev_name(priv->dev), priv)) { dev_err(priv->dev, "error attaching irq\n"); goto clean_ale_ret; } @@ -2147,7 +2109,7 @@ static int cpsw_probe(struct platform_device *pdev) if (ret) { dev_err(priv->dev, "error registering net device\n"); ret = -ENODEV; - goto clean_irq_ret; + goto clean_ale_ret; } if (cpts_register(&pdev->dev, priv->cpts, @@ -2155,44 +2117,27 @@ static int cpsw_probe(struct platform_device *pdev) dev_err(priv->dev, "error registering cpts device\n"); cpsw_notice(priv, probe, "initialized device (regs %x, irq %d)\n", - priv->cpsw_res->start, ndev->irq); + ss_res->start, ndev->irq); if (priv->data.dual_emac) { ret = cpsw_probe_dual_emac(pdev, priv); if (ret) { cpsw_err(priv, probe, "error probe slave 2 emac interface\n"); - goto clean_irq_ret; + goto clean_ale_ret; } } return 0; -clean_irq_ret: - for (i = 0; i < priv->num_irqs; i++) - free_irq(priv->irqs_table[i], priv); clean_ale_ret: cpsw_ale_destroy(priv->ale); clean_dma_ret: cpdma_chan_destroy(priv->txch); cpdma_chan_destroy(priv->rxch); cpdma_ctlr_destroy(priv->dma); -clean_wr_iomap_ret: - iounmap(priv->wr_regs); -clean_cpsw_wr_iores_ret: - release_mem_region(priv->cpsw_wr_res->start, - resource_size(priv->cpsw_wr_res)); -clean_iomap_ret: - iounmap(priv->regs); -clean_cpsw_iores_ret: - release_mem_region(priv->cpsw_res->start, - resource_size(priv->cpsw_res)); -clean_clk_ret: - clk_put(priv->clk); -clean_slave_ret: +clean_runtime_disable_ret: pm_runtime_disable(&pdev->dev); - kfree(priv->slaves); clean_ndev_ret: - kfree(priv->data.slave_data); free_netdev(priv->ndev); return ret; } @@ -2201,30 +2146,18 @@ static int cpsw_remove(struct platform_device *pdev) { struct net_device *ndev = platform_get_drvdata(pdev); struct cpsw_priv *priv = netdev_priv(ndev); - int i; if (priv->data.dual_emac) unregister_netdev(cpsw_get_slave_ndev(priv, 1)); unregister_netdev(ndev); cpts_unregister(priv->cpts); - for (i = 0; i < priv->num_irqs; i++) - free_irq(priv->irqs_table[i], priv); cpsw_ale_destroy(priv->ale); cpdma_chan_destroy(priv->txch); cpdma_chan_destroy(priv->rxch); cpdma_ctlr_destroy(priv->dma); - iounmap(priv->regs); - release_mem_region(priv->cpsw_res->start, - resource_size(priv->cpsw_res)); - iounmap(priv->wr_regs); - release_mem_region(priv->cpsw_wr_res->start, - resource_size(priv->cpsw_wr_res)); pm_runtime_disable(&pdev->dev); - clk_put(priv->clk); - kfree(priv->slaves); - kfree(priv->data.slave_data); if (priv->data.dual_emac) free_netdev(cpsw_get_slave_ndev(priv, 1)); free_netdev(ndev);