From bcc67771ed8ee31cc1f2b1e033ae822b40c72ff9 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Wed, 5 Jan 2011 21:13:12 +0000 Subject: net/fec: improve pm for better suspend/resume The following commit made a fix to use fec_enet_open/fec_enet_close over fec_enet_init/fec_stop for suspend/resume, because fec_enet_init does not allow to have a working network interface at resume. e3fe8558c7fc182972c3d947d88744482111f304 net/fec: fix pm to survive to suspend/resume This fix works for i.mx/mxc fec controller, but fails on mx28 fec which gets a different interrupt logic design. On i.mx fec, interrupt can be triggered even bit ETHER_EN of ECR register is not set. But on mx28 fec, ETHER_EN must be set to get interrupt work. Meanwhile, MII interrupt is mandatory to resume the driver, because MDIO read/write changed to interrupt mode by commit below. 97b72e4320a9aaa4a7f1592ee7d2da7e2c9bd349 fec: use interrupt for MDIO completion indication fec_restart/fec_stop comes out as the solution working for both cases. Signed-off-by: Shawn Guo Signed-off-by: David S. Miller --- drivers/net/fec.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 47a3c7b499e9..8a1c51f86414 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -1372,8 +1372,10 @@ fec_suspend(struct device *dev) if (ndev) { fep = netdev_priv(ndev); - if (netif_running(ndev)) - fec_enet_close(ndev); + if (netif_running(ndev)) { + fec_stop(ndev); + netif_device_detach(ndev); + } clk_disable(fep->clk); } return 0; @@ -1388,8 +1390,10 @@ fec_resume(struct device *dev) if (ndev) { fep = netdev_priv(ndev); clk_enable(fep->clk); - if (netif_running(ndev)) - fec_enet_open(ndev); + if (netif_running(ndev)) { + fec_restart(ndev, fep->full_duplex); + netif_device_attach(ndev); + } } return 0; } -- cgit v1.2.3