tg3: Remove 4G_DMA_BNDRY_BUG flag

Now that all chips have this bug, the flag checks become useless code.
This patch removes the flag.

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

1 files changed, 3 insertions, 11 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index c4f193eba82d..8483664b9cee 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -5822,8 +5822,7 @@ static int tigon3_dma_hwbug_workaround(struct tg3_napi *tnapi,
                 /* Make sure new skb does not cross any 4G boundaries.
                  * Drop the packet if it does.
                  */
-                } else if (tg3_flag(tp, 4G_DMA_BNDRY_BUG) &&
-                           tg3_4g_overflow_test(new_addr, new_skb->len)) {
+                } else if (tg3_4g_overflow_test(new_addr, new_skb->len)) {
                         pci_unmap_single(tp->pdev, new_addr, new_skb->len,
                                          PCI_DMA_TODEVICE);
                         ret = -1;
@@ -6018,8 +6017,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
         if (tg3_flag(tp, SHORT_DMA_BUG) && len <= 8)
                 would_hit_hwbug = 1;
 
-        if (tg3_flag(tp, 4G_DMA_BNDRY_BUG) &&
-            tg3_4g_overflow_test(mapping, len))
+        if (tg3_4g_overflow_test(mapping, len))
                 would_hit_hwbug = 1;
 
         if (tg3_40bit_overflow_test(tp, mapping, len))
@@ -6055,8 +6053,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
                             len <= 8)
                                 would_hit_hwbug = 1;
 
-                        if (tg3_flag(tp, 4G_DMA_BNDRY_BUG) &&
-                            tg3_4g_overflow_test(mapping, len))
+                        if (tg3_4g_overflow_test(mapping, len))
                                 would_hit_hwbug = 1;
 
                         if (tg3_40bit_overflow_test(tp, mapping, len))
@@ -13703,11 +13700,6 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
                 }
         }
 
-        /* All chips can get confused if TX buffers
-         * straddle the 4GB address boundary.
-         */
-        tg3_flag_set(tp, 4G_DMA_BNDRY_BUG);
-
         if (tg3_flag(tp, 5755_PLUS))
                 tg3_flag_set(tp, SHORT_DMA_BUG);