This reverts commit bfd546a552e140b0a4c8a21527c39d6d21addb28
Commit bfd546a552e1 ("e1000e: move force SMBUS near the end of
enable_ulp function") introduces system suspend failure on some
ethernet cards, at the moment, the pciid of the affected ethernet
cards include [8086:15b8] and [8086:15bc].
About the regression the commit bfd546a552e1 ("e1000e: move force
SMBUS near the end of enable_ulp function") tried to fix, looks like
it is not trivial to fix, we need to find a better way to resolve it.
Reported-by: Todd Brandt <todd.e.bra...@intel.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218940
Reported-by: Dieter Mummenschanz <dmummensch...@web.de>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218936
Signed-off-by: Hui Wang <hui.w...@canonical.com>
---
drivers/net/ethernet/intel/e1000e/ich8lan.c | 22 ---------------------
drivers/net/ethernet/intel/e1000e/netdev.c | 18 +++++++++++++++++
2 files changed, 18 insertions(+), 22 deletions(-)
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c
b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 2e98a2a0bead..f9e94be36e97 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1225,28 +1225,6 @@ s32 e1000_enable_ulp_lpt_lp(struct e1000_hw *hw, bool
to_sx)
}
release:
- /* Switching PHY interface always returns MDI error
- * so disable retry mechanism to avoid wasting time
- */
- e1000e_disable_phy_retry(hw);
-
- /* Force SMBus mode in PHY */
- ret_val = e1000_read_phy_reg_hv_locked(hw, CV_SMB_CTRL, &phy_reg);
- if (ret_val) {
- e1000e_enable_phy_retry(hw);
- hw->phy.ops.release(hw);
- goto out;
- }
- phy_reg |= CV_SMB_CTRL_FORCE_SMBUS;
- e1000_write_phy_reg_hv_locked(hw, CV_SMB_CTRL, phy_reg);
-
- e1000e_enable_phy_retry(hw);
-
- /* Force SMBus mode in MAC */
- mac_reg = er32(CTRL_EXT);
- mac_reg |= E1000_CTRL_EXT_FORCE_SMBUS;
- ew32(CTRL_EXT, mac_reg);
-
hw->phy.ops.release(hw);
out:
if (ret_val)
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c
b/drivers/net/ethernet/intel/e1000e/netdev.c
index da5c59daf8ba..220d62fca55d 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -6623,6 +6623,7 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool
runtime)
struct e1000_hw *hw = &adapter->hw;
u32 ctrl, ctrl_ext, rctl, status, wufc;
int retval = 0;
+ u16 smb_ctrl;
/* Runtime suspend should only enable wakeup for link changes */
if (runtime)
@@ -6696,6 +6697,23 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool
runtime)
if (retval)
return retval;
}
+
+ /* Force SMBUS to allow WOL */
+ /* Switching PHY interface always returns MDI error
+ * so disable retry mechanism to avoid wasting time
+ */
+ e1000e_disable_phy_retry(hw);
+
+ e1e_rphy(hw, CV_SMB_CTRL, &smb_ctrl);
+ smb_ctrl |= CV_SMB_CTRL_FORCE_SMBUS;
+ e1e_wphy(hw, CV_SMB_CTRL, smb_ctrl);
+
+ e1000e_enable_phy_retry(hw);
+
+ /* Force SMBus mode in MAC */
+ ctrl_ext = er32(CTRL_EXT);
+ ctrl_ext |= E1000_CTRL_EXT_FORCE_SMBUS;
+ ew32(CTRL_EXT, ctrl_ext);
}
/* Ensure that the appropriate bits are set in LPI_CTRL
--
2.34.1
