tg3: Don't turn off led on 5719 serdes port 0

[ Upstream commit 989038e217e94161862a959e82f9a1ecf8dda152 ]

Turning off led on port 0 of the 5719 serdes causes all other ports to
lose power and stop functioning. Add tg3_phy_led_bug() function to check
for this condition. We use a switch() in tg3_phy_led_bug() for
consistency with the tg3_phy_power_bug() function.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index a13463e..0877a05 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -3003,6 +3003,19 @@ static bool tg3_phy_power_bug(struct tg3 *tp)
        return false;
 }
 
+static bool tg3_phy_led_bug(struct tg3 *tp)
+{
+       switch (tg3_asic_rev(tp)) {
+       case ASIC_REV_5719:
+               if ((tp->phy_flags & TG3_PHYFLG_MII_SERDES) &&
+                   !tp->pci_fn)
+                       return true;
+               return false;
+       }
+
+       return false;
+}
+
 static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
 {
        u32 val;
@@ -3050,8 +3063,9 @@ static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
                }
                return;
        } else if (do_low_power) {
-               tg3_writephy(tp, MII_TG3_EXT_CTRL,
-                            MII_TG3_EXT_CTRL_FORCE_LED_OFF);
+               if (!tg3_phy_led_bug(tp))
+                       tg3_writephy(tp, MII_TG3_EXT_CTRL,
+                                    MII_TG3_EXT_CTRL_FORCE_LED_OFF);
 
                val = MII_TG3_AUXCTL_PCTL_100TX_LPWR |
                      MII_TG3_AUXCTL_PCTL_SPR_ISOLATE |