diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-07-08 12:55:45 +0800 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2019-07-24 13:55:09 -0700 |
| commit | e5e9a2ecfe780975820e157b922edee715710b66 (patch) | |
| tree | bd2528d94f7db842d6306c3e077c20a2a558feb5 /drivers/net/ethernet/intel/e1000e/ich8lan.c | |
| parent | 6d37a38243bc4bb3336b9771961e2904500fb3a9 (diff) | |
e1000e: add workaround for possible stalled packet
This works around a possible stalled packet issue, which may occur due to
clock recovery from the PCH being too slow, when the LAN is transitioning
from K1 at 1G link speed.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204057
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/ich8lan.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/ich8lan.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index 395b05701480..a1fab77b2096 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -1429,6 +1429,16 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw) else phy_reg |= 0xFA; e1e_wphy_locked(hw, I217_PLL_CLOCK_GATE_REG, phy_reg); + + if (speed == SPEED_1000) { + hw->phy.ops.read_reg_locked(hw, HV_PM_CTRL, + &phy_reg); + + phy_reg |= HV_PM_CTRL_K1_CLK_REQ; + + hw->phy.ops.write_reg_locked(hw, HV_PM_CTRL, + phy_reg); + } } hw->phy.ops.release(hw); |