From a4e32b0d0a26ba2f2ba1c65bd403d06ccc1df29c Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 17 Nov 2016 17:40:00 +0100 Subject: [PATCH] net: ethernet: ti: cpsw: fix deferred probe Make sure to deregister all child devices also on probe errors to avoid leaks and to fix probe deferral: cpsw 4a100000.ethernet: omap_device: omap_device_enable() called from invalid state 1 cpsw 4a100000.ethernet: use pm_runtime_put_sync_suspend() in driver? cpsw: probe of 4a100000.ethernet failed with error -22 Add generic helper to undo the effects of cpsw_probe_dt(), which will also be used in a follow-on patch to fix further leaks that have been introduced more recently. Note that the platform device is now runtime-resumed before registering any child devices in order to make sure that it is synchronously suspended after having deregistered the children in the error path. Fixes: 1fb19aa730e4 ("net: cpsw: Add parent<->child relation support between cpsw and mdio") Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/cpsw.c | 41 ++++++++++++++++++++-------------- 1 file changed, 24 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 84c5d214557e..5d14abb06486 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -2441,6 +2441,11 @@ no_phy_slave: return 0; } +static void cpsw_remove_dt(struct platform_device *pdev) +{ + of_platform_depopulate(&pdev->dev); +} + static int cpsw_probe_dual_emac(struct cpsw_priv *priv) { struct cpsw_common *cpsw = priv->cpsw; @@ -2585,10 +2590,19 @@ static int cpsw_probe(struct platform_device *pdev) /* Select default pin state */ pinctrl_pm_select_default_state(&pdev->dev); + /* Need to enable clocks with runtime PM api to access module + * registers + */ + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(&pdev->dev); + goto clean_runtime_disable_ret; + } + if (cpsw_probe_dt(&cpsw->data, pdev)) { dev_err(&pdev->dev, "cpsw: platform data missing\n"); ret = -ENODEV; - goto clean_runtime_disable_ret; + goto clean_dt_ret; } data = &cpsw->data; cpsw->rx_ch_num = 1; @@ -2609,7 +2623,7 @@ static int cpsw_probe(struct platform_device *pdev) GFP_KERNEL); if (!cpsw->slaves) { ret = -ENOMEM; - goto clean_runtime_disable_ret; + goto clean_dt_ret; } for (i = 0; i < data->slaves; i++) cpsw->slaves[i].slave_num = i; @@ -2621,7 +2635,7 @@ static int cpsw_probe(struct platform_device *pdev) if (IS_ERR(clk)) { dev_err(priv->dev, "fck is not found\n"); ret = -ENODEV; - goto clean_runtime_disable_ret; + goto clean_dt_ret; } cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000; @@ -2629,25 +2643,17 @@ static int cpsw_probe(struct platform_device *pdev) ss_regs = devm_ioremap_resource(&pdev->dev, ss_res); if (IS_ERR(ss_regs)) { ret = PTR_ERR(ss_regs); - goto clean_runtime_disable_ret; + goto clean_dt_ret; } cpsw->regs = ss_regs; - /* Need to enable clocks with runtime PM api to access module - * registers - */ - ret = pm_runtime_get_sync(&pdev->dev); - if (ret < 0) { - pm_runtime_put_noidle(&pdev->dev); - goto clean_runtime_disable_ret; - } cpsw->version = readl(&cpsw->regs->id_ver); res = platform_get_resource(pdev, IORESOURCE_MEM, 1); cpsw->wr_regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(cpsw->wr_regs)) { ret = PTR_ERR(cpsw->wr_regs); - goto clean_pm_runtime_put_ret; + goto clean_dt_ret; } memset(&dma_params, 0, sizeof(dma_params)); @@ -2684,7 +2690,7 @@ static int cpsw_probe(struct platform_device *pdev) default: dev_err(priv->dev, "unknown version 0x%08x\n", cpsw->version); ret = -ENODEV; - goto clean_pm_runtime_put_ret; + goto clean_dt_ret; } for (i = 0; i < cpsw->data.slaves; i++) { struct cpsw_slave *slave = &cpsw->slaves[i]; @@ -2713,7 +2719,7 @@ static int cpsw_probe(struct platform_device *pdev) if (!cpsw->dma) { dev_err(priv->dev, "error initializing dma\n"); ret = -ENOMEM; - goto clean_pm_runtime_put_ret; + goto clean_dt_ret; } cpsw->txch[0] = cpdma_chan_create(cpsw->dma, 0, cpsw_tx_handler, 0); @@ -2823,7 +2829,8 @@ clean_ale_ret: cpsw_ale_destroy(cpsw->ale); clean_dma_ret: cpdma_ctlr_destroy(cpsw->dma); -clean_pm_runtime_put_ret: +clean_dt_ret: + cpsw_remove_dt(pdev); pm_runtime_put_sync(&pdev->dev); clean_runtime_disable_ret: pm_runtime_disable(&pdev->dev); @@ -2850,7 +2857,7 @@ static int cpsw_remove(struct platform_device *pdev) cpsw_ale_destroy(cpsw->ale); cpdma_ctlr_destroy(cpsw->dma); - of_platform_depopulate(&pdev->dev); + cpsw_remove_dt(pdev); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); if (cpsw->data.dual_emac) -- 2.30.2