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Mon, 7 Dec 2020 11:39:08 +0000 From: Joakim Zhang To: peppe.cavallaro@st.com, alexandre.torgue@st.com, joabreu@synopsys.com, davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, linux-imx@nxp.com, Jisheng.Zhang@synaptics.com Subject: [PATCH RFC] ethernet: stmmac: clean up the code for release/suspend/resume function Date: Mon, 7 Dec 2020 19:38:49 +0800 Message-Id: <20201207113849.27930-1-qiangqing.zhang@nxp.com> X-Mailer: git-send-email 2.17.1 X-Originating-IP: [119.31.174.71] X-ClientProxiedBy: SG2PR0401CA0006.apcprd04.prod.outlook.com (2603:1096:3:1::16) To DB8PR04MB6795.eurprd04.prod.outlook.com (2603:10a6:10:fa::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.71) by SG2PR0401CA0006.apcprd04.prod.outlook.com (2603:1096:3:1::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3632.19 via Frontend Transport; Mon, 7 Dec 2020 11:39:05 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 5b435668-e630-4b5a-5af0-08d89aa4b544 X-MS-TrafficTypeDiagnostic: DB7PR04MB4106: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:313; 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Slightly adjust the order of the codes so that suspend/resume look more symmetrical, generally speaking they should appear symmetrically. Signed-off-by: Joakim Zhang --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 22 +++++++++---------- 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index c33db79cdd0a..a46e865c4acc 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2908,8 +2908,7 @@ static int stmmac_release(struct net_device *dev) struct stmmac_priv *priv = netdev_priv(dev); u32 chan; - if (device_may_wakeup(priv->device)) - phylink_speed_down(priv->phylink, false); + phylink_speed_down(priv->phylink, false); /* Stop and disconnect the PHY */ phylink_stop(priv->phylink); phylink_disconnect_phy(priv->phylink); @@ -5183,6 +5182,7 @@ int stmmac_suspend(struct device *dev) } else { mutex_unlock(&priv->lock); rtnl_lock(); + /* For PHY wakeup case */ if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); phylink_stop(priv->phylink); @@ -5260,11 +5260,17 @@ int stmmac_resume(struct device *dev) /* enable the clk previously disabled */ clk_prepare_enable(priv->plat->stmmac_clk); clk_prepare_enable(priv->plat->pclk); - if (priv->plat->clk_ptp_ref) - clk_prepare_enable(priv->plat->clk_ptp_ref); + clk_prepare_enable(priv->plat->clk_ptp_ref); /* reset the phy so that it's ready */ if (priv->mii) stmmac_mdio_reset(priv->mii); + + rtnl_lock(); + phylink_start(priv->phylink); + /* We may have called phylink_speed_down before */ + if (device_may_wakeup(priv->device)) + phylink_speed_up(priv->phylink); + rtnl_unlock(); } if (priv->plat->serdes_powerup) { @@ -5275,14 +5281,6 @@ int stmmac_resume(struct device *dev) return ret; } - if (!device_may_wakeup(priv->device) || !priv->plat->pmt) { - rtnl_lock(); - phylink_start(priv->phylink); - /* We may have called phylink_speed_down before */ - phylink_speed_up(priv->phylink); - rtnl_unlock(); - } - rtnl_lock(); mutex_lock(&priv->lock);