sky2: enable rx/tx in sky2_phy_reinit()

sky2_phy_reinit is called by the ethtool helpers sky2_set_settings,
sky2_nway_reset and sky2_set_pauseparam when netif_running.

However, at the end of sky2_phy_init GM_GP_CTRL has GM_GPCR_RX_ENA and
GM_GPCR_TX_ENA cleared. So, doing these commands causes the device to
stop working:

$ ethtool -r eth0
$ ethtool -A eth0 autoneg off

Fix this issue by enabling Rx/Tx after running sky2_phy_init in
sky2_phy_reinit.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Tested-by: Brandon Philips <bphilips@suse.de>
Cc: stable@kernel.org
Tested-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 2111c7bbf578..7985165e84fc 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -717,11 +717,24 @@ static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
         sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 }
 
+/* Enable Rx/Tx */
+static void sky2_enable_rx_tx(struct sky2_port *sky2)
+{
+        struct sky2_hw *hw = sky2->hw;
+        unsigned port = sky2->port;
+        u16 reg;
+
+        reg = gma_read16(hw, port, GM_GP_CTRL);
+        reg |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
+        gma_write16(hw, port, GM_GP_CTRL, reg);
+}
+
 /* Force a renegotiation */
 static void sky2_phy_reinit(struct sky2_port *sky2)
 {
         spin_lock_bh(&sky2->phy_lock);
         sky2_phy_init(sky2->hw, sky2->port);
+        sky2_enable_rx_tx(sky2);
         spin_unlock_bh(&sky2->phy_lock);
 }
 
@@ -2040,7 +2053,6 @@ static void sky2_link_up(struct sky2_port *sky2)
 {
         struct sky2_hw *hw = sky2->hw;
         unsigned port = sky2->port;
-        u16 reg;
         static const char *fc_name[] = {
                 [FC_NONE]       = "none",
                 [FC_TX]         = "tx",
@@ -2048,10 +2060,7 @@ static void sky2_link_up(struct sky2_port *sky2)
                 [FC_BOTH]       = "both",
         };
 
-        /* enable Rx/Tx */
-        reg = gma_read16(hw, port, GM_GP_CTRL);
-        reg |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
-        gma_write16(hw, port, GM_GP_CTRL, reg);
+        sky2_enable_rx_tx(sky2);
 
         gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);