From 99f93a156a2aa9ac1e44f7cb1a197425e6d9879a Mon Sep 17 00:00:00 2001 From: Alexander Kochetkov Date: Tue, 9 Feb 2016 18:20:39 +0300 Subject: [PATCH] net: arc_emac: reset txbd_curr and txbd_dirty pointers to zero EMAC reset internal tx ring pointer to zero at statup. txbd_curr and txbd_dirty can be different from zero. That cause ethernet transfer hang (no packets transmitted). In order to reproduce, run on device: ifconfig eth0 down ifconfig eth0 up Signed-off-by: Alexander Kochetkov Signed-off-by: David S. Miller --- drivers/net/ethernet/arc/emac_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c index 63a63e31d59d..4f6e5be184df 100644 --- a/drivers/net/ethernet/arc/emac_main.c +++ b/drivers/net/ethernet/arc/emac_main.c @@ -447,6 +447,9 @@ static int arc_emac_open(struct net_device *ndev) *last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM; } + priv->txbd_curr = 0; + priv->txbd_dirty = 0; + /* Clean Tx BD's */ memset(priv->txbd, 0, TX_RING_SZ); -- 2.20.1