From dbc64a8ea231271c580b5a570bc48cf42203fe0e Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 8 Jul 2014 12:40:12 +0100 Subject: [PATCH] net: fec: move calls to quiesce/resume packet processing out of fec_restart() Move the calls to quiesce and resume packet processing out of fec_restart() to its call sites. This is the first step in a two stage clean up of this code, where we just move the calls out of fec_restart() without changing them. Not everywhere needs to issue these calls, and not everywhere needs all of these calls to be issued. Acked-by: Fugang Duan Signed-off-by: Russell King Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/fec_main.c | 64 ++++++++++++++++------- 1 file changed, 45 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index bfb2bb00c493..b71b7491f38f 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -818,9 +818,10 @@ static void fec_enet_bd_init(struct net_device *dev) fep->dirty_tx = bdp; } -/* This function is called to start or restart the FEC during a link - * change. This only happens when switching between half and full - * duplex. +/* + * This function is called to start or restart the FEC during a link + * change, transmit timeout, or to reconfigure the FEC. The network + * packet processing for this device must be stopped before this call. */ static void fec_restart(struct net_device *ndev, int duplex) @@ -834,13 +835,6 @@ fec_restart(struct net_device *ndev, int duplex) u32 rcntl = OPT_FRAME_SIZE | 0x04; u32 ecntl = 0x2; /* ETHEREN */ - if (netif_running(ndev)) { - netif_device_detach(ndev); - napi_disable(&fep->napi); - netif_tx_disable(ndev); - netif_tx_lock_bh(ndev); - } - /* Whack a reset. We should wait for this. */ writel(1, fep->hwp + FEC_ECNTRL); udelay(10); @@ -1009,13 +1003,6 @@ fec_restart(struct net_device *ndev, int duplex) /* Enable interrupts we wish to service */ writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); - - if (netif_running(ndev)) { - netif_tx_unlock_bh(ndev); - netif_wake_queue(ndev); - napi_enable(&fep->napi); - netif_device_attach(ndev); - } } static void @@ -1071,8 +1058,15 @@ static void fec_enet_work(struct work_struct *work) fep->delay_work.timeout = false; rtnl_lock(); if (netif_device_present(ndev) || netif_running(ndev)) { + netif_device_detach(ndev); + napi_disable(&fep->napi); + netif_tx_disable(ndev); + netif_tx_lock_bh(ndev); fec_restart(ndev, fep->full_duplex); + netif_tx_unlock_bh(ndev); netif_wake_queue(ndev); + napi_enable(&fep->napi); + netif_device_attach(ndev); } rtnl_unlock(); } @@ -1529,8 +1523,17 @@ static void fec_enet_adjust_link(struct net_device *ndev) } /* if any of the above changed restart the FEC */ - if (status_change) + if (status_change) { + netif_device_detach(ndev); + napi_disable(&fep->napi); + netif_tx_disable(ndev); + netif_tx_lock_bh(ndev); fec_restart(ndev, phy_dev->duplex); + netif_tx_unlock_bh(ndev); + netif_wake_queue(ndev); + napi_enable(&fep->napi); + netif_device_attach(ndev); + } } else { if (fep->link) { fec_stop(ndev); @@ -1915,8 +1918,17 @@ static int fec_enet_set_pauseparam(struct net_device *ndev, fec_stop(ndev); phy_start_aneg(fep->phy_dev); } - if (netif_running(ndev)) + if (netif_running(ndev)) { + netif_device_detach(ndev); + napi_disable(&fep->napi); + netif_tx_disable(ndev); + netif_tx_lock_bh(ndev); fec_restart(ndev, fep->full_duplex); + netif_tx_unlock_bh(ndev); + netif_wake_queue(ndev); + napi_enable(&fep->napi); + netif_device_attach(ndev); + } return 0; } @@ -2359,8 +2371,15 @@ static int fec_set_features(struct net_device *netdev, if (netif_running(netdev)) { fec_stop(netdev); + netif_device_detach(netdev); + napi_disable(&fep->napi); + netif_tx_disable(netdev); + netif_tx_lock_bh(netdev); fec_restart(netdev, fep->phy_dev->duplex); + netif_tx_unlock_bh(netdev); netif_wake_queue(netdev); + napi_enable(&fep->napi); + netif_device_attach(netdev); } } @@ -2728,7 +2747,14 @@ fec_resume(struct device *dev) rtnl_lock(); if (netif_running(ndev)) { + netif_device_detach(ndev); + napi_disable(&fep->napi); + netif_tx_disable(ndev); + netif_tx_lock_bh(ndev); fec_restart(ndev, fep->full_duplex); + netif_tx_unlock_bh(ndev); + netif_wake_queue(ndev); + napi_enable(&fep->napi); netif_device_attach(ndev); phy_start(fep->phy_dev); }