r8169: expand received packet length indication.

commit deb9d93c89d311714a60809b28160e538e1cbb43 upstream.

8168d and above allow jumbo frames beyond 8k. Bump the received
packet length check before enabling jumbo frames on these chipsets.

Frame length indication covers bits 0..13 of the first Rx descriptor
32 bits for the 8169 and 8168. I only have authoritative documentation
for the allowed use of the extra (13) bit with the 8169 and 8168c.
Realtek's drivers use the same mask for the 816x and the fast ethernet
only 810x.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 0d34b38d09a5c9b96cf35e03d10af7e06648e927..3fe4fd3cbe8355510420fe7a14666f2c15bfd36b 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -5137,7 +5137,7 @@ static int rtl8169_rx_interrupt(struct net_device *dev,
                } else {
                        struct sk_buff *skb;
                        dma_addr_t addr = le64_to_cpu(desc->addr);
-                       int pkt_size = (status & 0x00001FFF) - 4;
+                       int pkt_size = (status & 0x00003fff) - 4;
 
                        /*
                         * The driver does not support incoming fragmented