igbvf: do not modify tx_queue_len on link speed change

Previously the driver tweaked txqueuelen to avoid false Tx hang reports seen at half duplex.
This had the effect of overriding user set values on link change/reset. Testing shows that
adjusting only the timeout factor is sufficient to prevent Tx hang reports at half duplex.

Based on e1000e patch by Franco Fichtner <franco@lastsummer.de>

CC: Franco Fichtner <franco@lastsummer.de>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/igbvf/igbvf.h b/drivers/net/igbvf/igbvf.h
index a1774b29d222093851ce46e29d5871d9cc69e286..debeee2dc717c6f86261c53ea93f46b84a07e9ca 100644 (file)
--- a/drivers/net/igbvf/igbvf.h
+++ b/drivers/net/igbvf/igbvf.h
@@ -198,7 +198,6 @@ struct igbvf_adapter {
        struct igbvf_ring *tx_ring /* One per active queue */
        ____cacheline_aligned_in_smp;
 
-       unsigned long tx_queue_len;
        unsigned int restart_queue;
        u32 txd_cmd;
 

diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index a77afd8a14bbfd30fed68c02cb1861e6113f50fa..b41037ed8083107a7d736a9a54ebacbd989f0d85 100644 (file)
--- a/drivers/net/igbvf/netdev.c
+++ b/drivers/net/igbvf/netdev.c
@@ -1304,8 +1304,6 @@ static void igbvf_configure_tx(struct igbvf_adapter *adapter)
 
        /* enable Report Status bit */
        adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
-
-       adapter->tx_queue_len = adapter->netdev->tx_queue_len;
 }
 
 /**
@@ -1524,7 +1522,6 @@ void igbvf_down(struct igbvf_adapter *adapter)
 
        del_timer_sync(&adapter->watchdog_timer);
 
-       netdev->tx_queue_len = adapter->tx_queue_len;
        netif_carrier_off(netdev);
 
        /* record the stats before reset*/
@@ -1857,21 +1854,15 @@ static void igbvf_watchdog_task(struct work_struct *work)
                                                  &adapter->link_duplex);
                        igbvf_print_link_info(adapter);
 
-                       /*
-                        * tweak tx_queue_len according to speed/duplex
-                        * and adjust the timeout factor
-                        */
-                       netdev->tx_queue_len = adapter->tx_queue_len;
+                       /* adjust timeout factor according to speed/duplex */
                        adapter->tx_timeout_factor = 1;
                        switch (adapter->link_speed) {
                        case SPEED_10:
                                txb2b = 0;
-                               netdev->tx_queue_len = 10;
                                adapter->tx_timeout_factor = 16;
                                break;
                        case SPEED_100:
                                txb2b = 0;
-                               netdev->tx_queue_len = 100;
                                /* maybe add some timeout factor ? */
                                break;
                        }