tg3: Fix 5719 A0 tx completion bug

The 5719 A0 has a bug that manifests itself as if the chipset were
reordering memory writes.  The best known way to solve this problem is
to turn off LSO and jumbo frames.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b944cc64a409..d6d081716af0 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8108,8 +8108,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
         /* Program the jumbo buffer descriptor ring control
          * blocks on those devices that have them.
          */
-        if ((tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE) &&
-            !(tp->tg3_flags2 & TG3_FLG2_5780_CLASS)) {
+        if (tp->pci_chip_rev_id == CHIPREV_ID_5719_A0 ||
+            ((tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE) &&
+            !(tp->tg3_flags2 & TG3_FLG2_5780_CLASS))) {
                 /* Setup replenish threshold. */
                 tw32(RCVBDI_JUMBO_THRESH, tp->rx_jumbo_pending / 8);
 
@@ -13329,7 +13330,9 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
         }
 
         /* Determine TSO capabilities */
-        if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
+        if (tp->pci_chip_rev_id == CHIPREV_ID_5719_A0)
+                ; /* Do nothing. HW bug. */
+        else if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
                 tp->tg3_flags2 |= TG3_FLG2_HW_TSO_3;
         else if ((tp->tg3_flags3 & TG3_FLG3_5755_PLUS) ||
                  GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
@@ -13380,7 +13383,8 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
                 tp->tg3_flags3 |= TG3_FLG3_40BIT_DMA_LIMIT_BUG;
         }
 
-        if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
+        if ((tp->tg3_flags3 & TG3_FLG3_5717_PLUS) &&
+            tp->pci_chip_rev_id != CHIPREV_ID_5719_A0)
                 tp->tg3_flags3 |= TG3_FLG3_USE_JUMBO_BDFLAG;
 
         if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS) ||