diff options
| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2009-01-26 12:16:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-01-26 12:16:26 -0800 |
| commit | 78272bbab895cc8f63bab5181dee55b72208e3b7 (patch) | |
| tree | 53aa763c515170daaf60b433e251afa842009719 /drivers/net/e1000e/82571.c | |
| parent | 71be7a36026b25e17657ff8e4317837176bf8cfd (diff) | |
e1000e: workaround hw errata
There is a hardware errata in some revisions of the 82574 that needs
to be worked around in the driver by setting a register bit at init.
If this bit is not set A0 versions of the 82574 can generate
tx hangs.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
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/82571.c')
| -rw-r--r-- | drivers/net/e1000e/82571.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c index cf43ee743b3..0890162953e 100644 --- a/drivers/net/e1000e/82571.c +++ b/drivers/net/e1000e/82571.c @@ -981,11 +981,15 @@ static void e1000_initialize_hw_bits_82571(struct e1000_hw *hw) ew32(PBA_ECC, reg); } - /* PCI-Ex Control Register */ + /* PCI-Ex Control Registers */ if (hw->mac.type == e1000_82574) { reg = er32(GCR); reg |= (1 << 22); ew32(GCR, reg); + + reg = er32(GCR2); + reg |= 1; + ew32(GCR2, reg); } return; |