[PATCH] e1000e: Fix error handling in e1000_set_d0_lplu_state_82571

[Dinghao Liu]

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 <dinghao....@zju.edu.cn>
---
 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
-- 
2.17.1