e1000e: workaround a Tx hang on 82577/82578
With bi-directional stress traffic, the receiver could hang causing the hardware to stop and a "Detected Tx Unit Hang" message dumped to the system logfile. Temporarily workaround this issue by disabling Tx flow control by default. The issue is currently being investigated and a follow-on patch will be provided to revert this when it is resolved. Signed-off-by: Bruce Allan <bruce.w.allan@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:
parent
a4f58f5455
commit
37289d9c1e
|
@ -2348,8 +2348,13 @@ static s32 e1000_setup_link_ich8lan(struct e1000_hw *hw)
|
||||||
* the default flow control setting, so we explicitly
|
* the default flow control setting, so we explicitly
|
||||||
* set it to full.
|
* set it to full.
|
||||||
*/
|
*/
|
||||||
if (hw->fc.requested_mode == e1000_fc_default)
|
if (hw->fc.requested_mode == e1000_fc_default) {
|
||||||
hw->fc.requested_mode = e1000_fc_full;
|
/* Workaround h/w hang when Tx flow control enabled */
|
||||||
|
if (hw->mac.type == e1000_pchlan)
|
||||||
|
hw->fc.requested_mode = e1000_fc_rx_pause;
|
||||||
|
else
|
||||||
|
hw->fc.requested_mode = e1000_fc_full;
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Save off the requested flow control mode for use later. Depending
|
* Save off the requested flow control mode for use later. Depending
|
||||||
|
|
Loading…
Reference in New Issue