diff options
| author |   Bruce Allan <bruce.w.allan@intel.com> | 2009-06-02 11:29:37 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-06-03 02:46:36 -0700 |
| commit | 37289d9c1e72a186ea5f28bee79efeb1d4e7309c (patch) | |
| tree | 429af3e67d9f5d91cf472e40fd1039e6cffe3e69 /drivers/net/e1000e | |
| parent | e1000e: add support for 82577/82578 GbE LOM parts (diff) | |
| download | linux-dev-37289d9c1e72a186ea5f28bee79efeb1d4e7309c.tar.xz linux-dev-37289d9c1e72a186ea5f28bee79efeb1d4e7309c.zip | |
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>
Diffstat (limited to 'drivers/net/e1000e')
| -rw-r--r-- | drivers/net/e1000e/ich8lan.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index b69c8190da30..9e23f50fb9cd 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -2348,8 +2348,13 @@ static s32 e1000_setup_link_ich8lan(struct e1000_hw *hw) * the default flow control setting, so we explicitly * set it to full. */ - if (hw->fc.requested_mode == e1000_fc_default) - hw->fc.requested_mode = e1000_fc_full; + if (hw->fc.requested_mode == e1000_fc_default) { + /* 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 |