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e1000e: 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.

This patch removes all instances of tx_queue_len in the driver.

Originally reported and patched by Franco Fichtner
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 2010-03-24 12:55:02 +00:00 committed by David S. Miller
parent a08af745e4
commit f49c57e141
2 changed files with 1 additions and 11 deletions
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1
drivers/net/e1000e/e1000.h
View File

@ -279,7 +279,6 @@ struct e1000_adapter {
struct napi_struct napi;
unsigned long tx_queue_len;
unsigned int restart_queue;
u32 txd_cmd;

11
drivers/net/e1000e/netdev.c
View File

@ -2289,8 +2289,6 @@ static void e1000_configure_tx(struct e1000_adapter *adapter)
ew32(TCTL, tctl);
e1000e_config_collision_dist(hw);
adapter->tx_queue_len = adapter->netdev->tx_queue_len;
}
/**
@ -2877,7 +2875,6 @@ void e1000e_down(struct e1000_adapter *adapter)
del_timer_sync(&adapter->watchdog_timer);
del_timer_sync(&adapter->phy_info_timer);
netdev->tx_queue_len = adapter->tx_queue_len;
netif_carrier_off(netdev);
adapter->link_speed = 0;
adapter->link_duplex = 0;
@ -3588,21 +3585,15 @@ static void e1000_watchdog_task(struct work_struct *work)
"link gets many collisions.\n");
}
/*
* 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;
adapter->tx_timeout_factor = 10;
break;
}