atl1e: limit gso segment size to prevent generation of wrong ip length fields
Hannes Frederic Sowa [Tue, 2 Apr 2013 14:36:46 +0000 (14:36 +0000)]
[ Upstream commit 31d1670e73f4911fe401273a8f576edc9c2b5fea ]

The limit of 0x3c00 is taken from the windows driver.

Suggested-by: Huang, Xiong <xiong@qca.qualcomm.com>
Cc: Huang, Xiong <xiong@qca.qualcomm.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/ethernet/atheros/atl1e/atl1e.h
drivers/net/ethernet/atheros/atl1e/atl1e_main.c

index edfdf6b..b5fd934 100644 (file)
@@ -186,7 +186,7 @@ struct atl1e_tpd_desc {
 /* how about 0x2000 */
 #define MAX_TX_BUF_LEN      0x2000
 #define MAX_TX_BUF_SHIFT    13
-/*#define MAX_TX_BUF_LEN  0x3000 */
+#define MAX_TSO_SEG_SIZE    0x3c00
 
 /* rrs word 1 bit 0:31 */
 #define RRS_RX_CSUM_MASK       0xFFFF
index f964151..d53509e 100644 (file)
@@ -2354,6 +2354,7 @@ static int __devinit atl1e_probe(struct pci_dev *pdev,
 
        INIT_WORK(&adapter->reset_task, atl1e_reset_task);
        INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
+       netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
        err = register_netdev(netdev);
        if (err) {
                netdev_err(netdev, "register netdevice failed\n");