[PATCH] e1000e: Fix error handling in e1000_set_d0_lplu_state_82571

There is one e1e_wphy() call in e1000_set_d0_lplu_state_82571
that we have caught its return value but lack further handling.
Check and terminate the execution flow just like other e1e_wphy()
in this function.

Signed-off-by: Dinghao Liu <redacted>
---
  drivers/net/ethernet/intel/e1000e/82571.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c
index 88faf05e23ba..0b1e890dd583 100644
--- a/drivers/net/ethernet/intel/e1000e/82571.c
+++ b/drivers/net/ethernet/intel/e1000e/82571.c

@@ -899,6 +899,8 @@ static s32 e1000_set_d0_lplu_state_82571(struct e1000_hw *hw, bool active)
  	} else {
  		data &= ~IGP02E1000_PM_D0_LPLU;
  		ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
+		if (ret_val)
+			return ret_val;
  		/* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
  		 * during Dx states where the power conservation is most
  		 * important.  During driver activity we should enable

There is one e1e_wphy() call in e1000_set_d0_lplu_state_82571
that we have caught its return value but lack further handling.
Check and terminate the execution flow just like other e1e_wphy()
in this function.

Signed-off-by: Dinghao Liu <redacted>
---
  drivers/net/ethernet/intel/e1000e/82571.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c
index 88faf05e23ba..0b1e890dd583 100644
--- a/drivers/net/ethernet/intel/e1000e/82571.c
+++ b/drivers/net/ethernet/intel/e1000e/82571.c

@@ -899,6 +899,8 @@ static s32 e1000_set_d0_lplu_state_82571(struct e1000_hw *hw, bool active)
  	} else {
  		data &= ~IGP02E1000_PM_D0_LPLU;
  		ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
+		if (ret_val)
+			return ret_val;
  		/* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
  		 * during Dx states where the power conservation is most
  		 * important.  During driver activity we should enable