From 91d3ddb8cb5fd507048ed3fa4d7bba431fe038bc Mon Sep 17 00:00:00 2001 From: Siva Reddy Kallam Date: Tue, 20 Nov 2018 10:04:04 +0530 Subject: [PATCH] tg3: Add PHY reset for 5717/5719/5720 in change ring and flow control paths [ Upstream commit 59663e42199c93d1d7314d1446f6782fc4b1eb81 ] This patch has the fix to avoid PHY lockup with 5717/5719/5720 in change ring and flow control paths. This patch solves the RX hang while doing continuous ring or flow control parameters with heavy traffic from peer. Signed-off-by: Siva Reddy Kallam Acked-by: Michael Chan Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/broadcom/tg3.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 6250989c83d8..c069a04a6e7e 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -12389,6 +12389,7 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e { struct tg3 *tp = netdev_priv(dev); int i, irq_sync = 0, err = 0; + bool reset_phy = false; if ((ering->rx_pending > tp->rx_std_ring_mask) || (ering->rx_jumbo_pending > tp->rx_jmb_ring_mask) || @@ -12420,7 +12421,13 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e if (netif_running(dev)) { tg3_halt(tp, RESET_KIND_SHUTDOWN, 1); - err = tg3_restart_hw(tp, false); + /* Reset PHY to avoid PHY lock up */ + if (tg3_asic_rev(tp) == ASIC_REV_5717 || + tg3_asic_rev(tp) == ASIC_REV_5719 || + tg3_asic_rev(tp) == ASIC_REV_5720) + reset_phy = true; + + err = tg3_restart_hw(tp, reset_phy); if (!err) tg3_netif_start(tp); } @@ -12454,6 +12461,7 @@ static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam { struct tg3 *tp = netdev_priv(dev); int err = 0; + bool reset_phy = false; if (tp->link_config.autoneg == AUTONEG_ENABLE) tg3_warn_mgmt_link_flap(tp); @@ -12544,7 +12552,13 @@ static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam if (netif_running(dev)) { tg3_halt(tp, RESET_KIND_SHUTDOWN, 1); - err = tg3_restart_hw(tp, false); + /* Reset PHY to avoid PHY lock up */ + if (tg3_asic_rev(tp) == ASIC_REV_5717 || + tg3_asic_rev(tp) == ASIC_REV_5719 || + tg3_asic_rev(tp) == ASIC_REV_5720) + reset_phy = true; + + err = tg3_restart_hw(tp, reset_phy); if (!err) tg3_netif_start(tp); } -- 2.20.1