From: Matt Carlson <mcarlson@broadcom.com>
Date: Mon, 13 Jun 2011 13:38:57 +0000 (+0000)
Subject: tg3: Remove 4G_DMA_BNDRY_BUG flag
X-Git-Tag: v3.12-rc1~5334^2~451^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb69d564a3f34df602bd9b0fae94e14fad23de2d;p=kernel%2Fkernel-generic.git

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>
---

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index c4f193e..8483664 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);
 
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 4f5dbf6..fc33566 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2896,7 +2896,6 @@ enum TG3_FLAGS {
 	TG3_FLAG_NO_NVRAM,
 	TG3_FLAG_ENABLE_RSS,
 	TG3_FLAG_ENABLE_TSS,
-	TG3_FLAG_4G_DMA_BNDRY_BUG,
 	TG3_FLAG_SHORT_DMA_BUG,
 	TG3_FLAG_USE_JUMBO_BDFLAG,
 	TG3_FLAG_L1PLLPD_EN,