From 33a23e223749c45ff8099ff9baa235301a3ad07f Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Thu, 16 Jan 2014 10:52:44 +0000 Subject: [PATCH] net: stmmac: use suspend functions for hibernation In hibernation freeze case the driver just releases the resources like dma buffers, irqs, unregisters the drivers and during restore it does register, request the resources. This is not really necessary, as part of power management all the data structures are intact, all the previously allocated resources can be used after coming out of low power. This patch uses the suspend and resume callbacks for freeze and restore which initializes the hardware correctly without unregistering or releasing the resources, this should also help in reducing the time to restore. Also this patch fixes a bug in stmmac_pltfr_restore and stmmac_pltfr_freeze where it tries to get hold of platform data via dev_get_platdata call, which would return NULL in device tree cases and the next if statement would crash as there is no NULL check. Signed-off-by: Srinivas Kandagatla Acked-by: Giuseppe Cavallaro Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 - drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 16 -------- .../net/ethernet/stmicro/stmmac/stmmac_platform.c | 44 ++++++---------------- 3 files changed, 12 insertions(+), 50 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 5a568015..027f1dd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -117,8 +117,6 @@ struct stmmac_priv { extern const struct stmmac_hwtimestamp stmmac_ptp; int stmmac_ptp_register(struct stmmac_priv *priv); void stmmac_ptp_unregister(struct stmmac_priv *priv); -int stmmac_freeze(struct net_device *ndev); -int stmmac_restore(struct net_device *ndev); int stmmac_resume(struct net_device *ndev); int stmmac_suspend(struct net_device *ndev); int stmmac_dvr_remove(struct net_device *ndev); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 742a83f..c1298a0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2912,22 +2912,6 @@ int stmmac_resume(struct net_device *ndev) return 0; } - -int stmmac_freeze(struct net_device *ndev) -{ - if (!ndev || !netif_running(ndev)) - return 0; - - return stmmac_release(ndev); -} - -int stmmac_restore(struct net_device *ndev) -{ - if (!ndev || !netif_running(ndev)) - return 0; - - return stmmac_open(ndev); -} #endif /* CONFIG_PM */ /* Driver can be configured w/ and w/ both PCI and Platf drivers diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 9377ee6..6d0bf22 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -211,55 +211,35 @@ static int stmmac_pltfr_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int stmmac_pltfr_suspend(struct device *dev) { - struct net_device *ndev = dev_get_drvdata(dev); - - return stmmac_suspend(ndev); -} - -static int stmmac_pltfr_resume(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - - return stmmac_resume(ndev); -} - -static int stmmac_pltfr_freeze(struct device *dev) -{ int ret; - struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); struct platform_device *pdev = to_platform_device(dev); - ret = stmmac_freeze(ndev); - if (plat_dat->exit) - plat_dat->exit(pdev); + ret = stmmac_suspend(ndev); + if (priv->plat->exit) + priv->plat->exit(pdev); return ret; } -static int stmmac_pltfr_restore(struct device *dev) +static int stmmac_pltfr_resume(struct device *dev) { - struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); struct platform_device *pdev = to_platform_device(dev); - if (plat_dat->init) - plat_dat->init(pdev); + if (priv->plat->init) + priv->plat->init(pdev); - return stmmac_restore(ndev); + return stmmac_resume(ndev); } -static const struct dev_pm_ops stmmac_pltfr_pm_ops = { - .suspend = stmmac_pltfr_suspend, - .resume = stmmac_pltfr_resume, - .freeze = stmmac_pltfr_freeze, - .thaw = stmmac_pltfr_restore, - .restore = stmmac_pltfr_restore, -}; -#else -static const struct dev_pm_ops stmmac_pltfr_pm_ops; #endif /* CONFIG_PM */ +static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, + stmmac_pltfr_suspend, stmmac_pltfr_resume); + static const struct of_device_id stmmac_dt_ids[] = { { .compatible = "st,spear600-gmac"}, { .compatible = "snps,dwmac-3.610"}, -- 1.8.5.5