On the 5718, 5719 and 5720 serdes devices, powering down function 0
results in all the other ports being powered down. Add code to skip
function 0 power down.

Cc: <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Signed-off-by: Nithin Nayak Sujir <[email protected]>
---
 drivers/net/ethernet/broadcom/tg3.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c 
b/drivers/net/ethernet/broadcom/tg3.c
index 728d42a..737f035 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -2957,6 +2957,23 @@ static int tg3_5700_link_polarity(struct tg3 *tp, u32 
speed)
        return 0;
 }
 
+static bool tg3_phy_power_bug(struct tg3 *tp)
+{
+       if (tg3_asic_rev(tp) == ASIC_REV_5700 ||
+           tg3_asic_rev(tp) == ASIC_REV_5704 ||
+           (tg3_asic_rev(tp) == ASIC_REV_5780 &&
+            (tp->phy_flags & TG3_PHYFLG_MII_SERDES)) ||
+           (tg3_asic_rev(tp) == ASIC_REV_5717 &&
+            !tp->pci_fn) ||
+           ((tg3_asic_rev(tp) == ASIC_REV_5719 ||
+             tg3_asic_rev(tp) == ASIC_REV_5720) &&
+            (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) &&
+            !tp->pci_fn))
+               return true;
+
+       return false;
+}
+
 static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
 {
        u32 val;
@@ -3016,12 +3033,7 @@ static void tg3_power_down_phy(struct tg3 *tp, bool 
do_low_power)
        /* The PHY should not be powered down on some chips because
         * of bugs.
         */
-       if (tg3_asic_rev(tp) == ASIC_REV_5700 ||
-           tg3_asic_rev(tp) == ASIC_REV_5704 ||
-           (tg3_asic_rev(tp) == ASIC_REV_5780 &&
-            (tp->phy_flags & TG3_PHYFLG_MII_SERDES)) ||
-           (tg3_asic_rev(tp) == ASIC_REV_5717 &&
-            !tp->pci_fn))
+       if (tg3_phy_power_bug(tp))
                return;
 
        if (tg3_chip_rev(tp) == CHIPREV_5784_AX ||
-- 
1.8.1.4


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