From 8f87e626b059f1b82b017f53c5ee91fbc4486e36 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 2 Jan 2017 12:56:02 +0100 Subject: [PATCH 1/3] net: stmmac: dwmac-oxnas: fix of-node leak Use the syscon lookup-by-phandle helper so that the reference taken by of_parse_phandle() is released when done with the node. Fixes: 5ed7414062e7 ("net: stmmac: Add OXNAS Glue Driver") Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c index c35597586121..fcc237e0aae1 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c @@ -109,16 +109,9 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) { struct plat_stmmacenet_data *plat_dat; struct stmmac_resources stmmac_res; - struct device_node *sysctrl; struct oxnas_dwmac *dwmac; int ret; - sysctrl = of_parse_phandle(pdev->dev.of_node, "oxsemi,sys-ctrl", 0); - if (!sysctrl) { - dev_err(&pdev->dev, "failed to get sys-ctrl node\n"); - return -EINVAL; - } - ret = stmmac_get_platform_resources(pdev, &stmmac_res); if (ret) return ret; @@ -134,7 +127,8 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) dwmac->dev = &pdev->dev; plat_dat->bsp_priv = dwmac; - dwmac->regmap = syscon_node_to_regmap(sysctrl); + dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "oxsemi,sys-ctrl"); if (IS_ERR(dwmac->regmap)) { dev_err(&pdev->dev, "failed to have sysctrl regmap\n"); return PTR_ERR(dwmac->regmap); From 6b4c212b95ce6a586473a772fb2d28ab22a38f0e Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 2 Jan 2017 12:56:03 +0100 Subject: [PATCH 2/3] net: stmmac: dwmac-oxnas: fix fixed-link-phydev leaks Make sure to deregister and free any fixed-link phy registered during probe on probe errors and on driver unbind by calling the new glue helper function. For driver unbind, use the generic stmmac-platform remove implementation and add an exit callback to disable the clock. Fixes: 5ed7414062e7 ("net: stmmac: Add OXNAS Glue Driver") Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- .../net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 41 ++++++++++++------- 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c index fcc237e0aae1..3efd110613df 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c @@ -105,6 +105,13 @@ static int oxnas_dwmac_init(struct oxnas_dwmac *dwmac) return 0; } +static void oxnas_dwmac_exit(struct platform_device *pdev, void *priv) +{ + struct oxnas_dwmac *dwmac = priv; + + clk_disable_unprepare(dwmac->clk); +} + static int oxnas_dwmac_probe(struct platform_device *pdev) { struct plat_stmmacenet_data *plat_dat; @@ -121,40 +128,44 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) return PTR_ERR(plat_dat); dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL); - if (!dwmac) - return -ENOMEM; + if (!dwmac) { + ret = -ENOMEM; + goto err_remove_config_dt; + } dwmac->dev = &pdev->dev; plat_dat->bsp_priv = dwmac; + plat_dat->exit = oxnas_dwmac_exit; dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "oxsemi,sys-ctrl"); if (IS_ERR(dwmac->regmap)) { dev_err(&pdev->dev, "failed to have sysctrl regmap\n"); - return PTR_ERR(dwmac->regmap); + ret = PTR_ERR(dwmac->regmap); + goto err_remove_config_dt; } dwmac->clk = devm_clk_get(&pdev->dev, "gmac"); - if (IS_ERR(dwmac->clk)) - return PTR_ERR(dwmac->clk); + if (IS_ERR(dwmac->clk)) { + ret = PTR_ERR(dwmac->clk); + goto err_remove_config_dt; + } ret = oxnas_dwmac_init(dwmac); if (ret) - return ret; + goto err_remove_config_dt; ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); if (ret) - clk_disable_unprepare(dwmac->clk); + goto err_dwmac_exit; - return ret; -} -static int oxnas_dwmac_remove(struct platform_device *pdev) -{ - struct oxnas_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev); - int ret = stmmac_dvr_remove(&pdev->dev); + return 0; - clk_disable_unprepare(dwmac->clk); +err_dwmac_exit: + oxnas_dwmac_exit(pdev, plat_dat->bsp_priv); +err_remove_config_dt: + stmmac_remove_config_dt(pdev, plat_dat); return ret; } @@ -197,7 +208,7 @@ MODULE_DEVICE_TABLE(of, oxnas_dwmac_match); static struct platform_driver oxnas_dwmac_driver = { .probe = oxnas_dwmac_probe, - .remove = oxnas_dwmac_remove, + .remove = stmmac_pltfr_remove, .driver = { .name = "oxnas-dwmac", .pm = &oxnas_dwmac_pm_ops, From a8de4d719dfc12bc22192d7daef7c7ae6cfb8b80 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 2 Jan 2017 12:56:04 +0100 Subject: [PATCH 3/3] net: stmmac: dwmac-oxnas: use generic pm implementation Now that we have an exit callback in place, add init as well and get rid of the custom PM callbacks in favour of the generic ones. Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- .../net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 38 +++---------------- 1 file changed, 5 insertions(+), 33 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c index 3efd110613df..3dc7d279f805 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c @@ -60,8 +60,9 @@ struct oxnas_dwmac { struct regmap *regmap; }; -static int oxnas_dwmac_init(struct oxnas_dwmac *dwmac) +static int oxnas_dwmac_init(struct platform_device *pdev, void *priv) { + struct oxnas_dwmac *dwmac = priv; unsigned int value; int ret; @@ -135,6 +136,7 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) dwmac->dev = &pdev->dev; plat_dat->bsp_priv = dwmac; + plat_dat->init = oxnas_dwmac_init; plat_dat->exit = oxnas_dwmac_exit; dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, @@ -151,7 +153,7 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) goto err_remove_config_dt; } - ret = oxnas_dwmac_init(dwmac); + ret = oxnas_dwmac_init(pdev, plat_dat->bsp_priv); if (ret) goto err_remove_config_dt; @@ -170,36 +172,6 @@ static int oxnas_dwmac_probe(struct platform_device *pdev) return ret; } -#ifdef CONFIG_PM_SLEEP -static int oxnas_dwmac_suspend(struct device *dev) -{ - struct oxnas_dwmac *dwmac = get_stmmac_bsp_priv(dev); - int ret; - - ret = stmmac_suspend(dev); - clk_disable_unprepare(dwmac->clk); - - return ret; -} - -static int oxnas_dwmac_resume(struct device *dev) -{ - struct oxnas_dwmac *dwmac = get_stmmac_bsp_priv(dev); - int ret; - - ret = oxnas_dwmac_init(dwmac); - if (ret) - return ret; - - ret = stmmac_resume(dev); - - return ret; -} -#endif /* CONFIG_PM_SLEEP */ - -static SIMPLE_DEV_PM_OPS(oxnas_dwmac_pm_ops, - oxnas_dwmac_suspend, oxnas_dwmac_resume); - static const struct of_device_id oxnas_dwmac_match[] = { { .compatible = "oxsemi,ox820-dwmac" }, { } @@ -211,7 +183,7 @@ static struct platform_driver oxnas_dwmac_driver = { .remove = stmmac_pltfr_remove, .driver = { .name = "oxnas-dwmac", - .pm = &oxnas_dwmac_pm_ops, + .pm = &stmmac_pltfr_pm_ops, .of_match_table = oxnas_dwmac_match, }, };