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tg3: Add PHY reset for 5717/5719/5720 in change ring and flow control paths 

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 <siva.kallam@broadcom.com>
Acked-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Siva Reddy Kallam 2018-11-20 10:04:04 +05:30 committed by David S. Miller
parent 1359f25106
commit 59663e4219
1 changed files with 16 additions and 2 deletions
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18
drivers/net/ethernet/broadcom/tg3.c
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@ -12422,6 +12422,7 @@ 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) ||
@ -12453,7 +12454,13 @@ 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);
}
@ -12487,6 +12494,7 @@ 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);
@ -12556,7 +12564,13 @@ 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);
}