tg3: Expand 4g_overflow_test workaround to skb fragments of any size.

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@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index b51560d..36a0b43 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7482,7 +7482,7 @@ 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 TSO DMA buffers that cross into regions which are within MSS bytes