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e1000: 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.

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>
Acked-by: Jesse Brandeburg <jesse.brandeburg@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 2010-03-26 11:25:58 +00:00 committed by David S. Miller
parent 7438189baa
commit 39ca5f033b
2 changed files with 1 additions and 9 deletions
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1
drivers/net/e1000/e1000.h
View file

@ -261,7 +261,6 @@ struct e1000_adapter {
/* TX */
struct e1000_tx_ring *tx_ring; /* One per active queue */
unsigned int restart_queue;
unsigned long tx_queue_len;
u32 txd_cmd;
u32 tx_int_delay;
u32 tx_abs_int_delay;

9
drivers/net/e1000/e1000_main.c
View file

@ -383,8 +383,6 @@ static void e1000_configure(struct e1000_adapter *adapter)
adapter->alloc_rx_buf(adapter, ring,
E1000_DESC_UNUSED(ring));
}
adapter->tx_queue_len = netdev->tx_queue_len;
}
int e1000_up(struct e1000_adapter *adapter)
@ -503,7 +501,6 @@ void e1000_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;
adapter->link_speed = 0;
adapter->link_duplex = 0;
netif_carrier_off(netdev);
@ -2316,19 +2313,15 @@ static void e1000_watchdog(unsigned long data)
E1000_CTRL_RFCE) ? "RX" : ((ctrl &
E1000_CTRL_TFCE) ? "TX" : "None" )));
/* 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 = false;
netdev->tx_queue_len = 10;
adapter->tx_timeout_factor = 16;
break;
case SPEED_100:
txb2b = false;
netdev->tx_queue_len = 100;
/* maybe add some timeout factor ? */
break;
}