From 79fba9f51755c704c0a7d7b7f0df10874dc0a744 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Mon, 28 May 2012 23:07:55 +0000 Subject: net: sh_eth: fix the rxdesc pointer when rx descriptor empty happens When Receive Descriptor Empty happens, rxdesc pointer of the driver and actual next descriptor of the controller may be mismatch. This patch fixes it. Signed-off-by: Yoshihiro Shimoda Signed-off-by: David S. Miller --- drivers/net/ethernet/renesas/sh_eth.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/net/ethernet/renesas') diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index be3c22179161..667169b82526 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1101,8 +1101,12 @@ static int sh_eth_rx(struct net_device *ndev) /* Restart Rx engine if stopped. */ /* If we don't need to check status, don't. -KDU */ - if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) + if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) { + /* fix the values for the next receiving */ + mdp->cur_rx = mdp->dirty_rx = (sh_eth_read(ndev, RDFAR) - + sh_eth_read(ndev, RDLAR)) >> 4; sh_eth_write(ndev, EDRRR_R, EDRRR); + } return 0; } @@ -1199,8 +1203,6 @@ static void sh_eth_error(struct net_device *ndev, int intr_status) /* Receive Descriptor Empty int */ ndev->stats.rx_over_errors++; - if (sh_eth_read(ndev, EDRRR) ^ EDRRR_R) - sh_eth_write(ndev, EDRRR_R, EDRRR); if (netif_msg_rx_err(mdp)) dev_err(&ndev->dev, "Receive Descriptor Empty\n"); } -- cgit v1.2.3