[PATCH 3.8 121/166] tg3: Expand 4g_overflow_test workaround to skb fragments of any size.

[Kamal Mostafa]

3.8.13.16 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nithin Sujir <nsujir@xxxxxxxxxxxx>

commit 375679104ab3ccfd18dcbd7ba503734fb9a2c63a upstream.

The current driver assumes that an skb fragment can only be upto jumbo
size. Presumably this was a fast-path optimization. This assumption is
no longer true as fragments can be upto 32k.

v2: Remove unnecessary parantheses per Eric Dumazet.

Signed-off-by: Nithin Nayak Sujir <nsujir@xxxxxxxxxxxx>
Signed-off-by: Michael Chan <mchan@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
 drivers/net/ethernet/broadcom/tg3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 79096af..3149f5b 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7030,7 +7030,7 @@ static inline int tg3_4g_overflow_test(dma_addr_t mapping, int len)
 {
 	u32 base = (u32) mapping & 0xffffffff;
 
-	return (base > 0xffffdcc0) && (base + len + 8 < base);
+	return base + len + 8 < base;
 }
 
 /* Test for DMA addresses > 40-bit */
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/