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igbvf: do not modify tx_queue_len on link speed change

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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>
This commit is contained in:
Emil Tantilov 2010-03-25 12:11:48 +00:00 committed by David S. Miller
parent 6a2bad70d5
commit a08af745e4
2 changed files with 1 additions and 11 deletions
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1
drivers/net/igbvf/igbvf.h
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@ -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;

11
drivers/net/igbvf/netdev.c
View File

@ -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;
}