[PATCH] ethernet: (80003es2lan) fix missing checks for return value of reg write

[Kangjie Lu]

e1000_write_kmrn_reg_80003es2lan() may fail. The fix checks its return
value and returns with its error code if it fails.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/net/ethernet/intel/e1000e/80003es2lan.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/80003es2lan.c 
b/drivers/net/ethernet/intel/e1000e/80003es2lan.c
index 257bd59bc9c6..7e2d4b9839bb 100644
--- a/drivers/net/ethernet/intel/e1000e/80003es2lan.c
+++ b/drivers/net/ethernet/intel/e1000e/80003es2lan.c
@@ -699,8 +699,11 @@ static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
        if (ret_val)
                return ret_val;
        kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
-       e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
-                                        kum_reg_data);
+       ret_val =
+               e1000_write_kmrn_reg_80003es2lan(hw,
+                               E1000_KMRNCTRLSTA_INBAND_PARAM, kum_reg_data);
+       if (ret_val)
+               return ret_val;
 
        ret_val = e1000e_get_auto_rd_done(hw);
        if (ret_val)
@@ -757,8 +760,11 @@ static s32 e1000_init_hw_80003es2lan(struct e1000_hw *hw)
        e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
                                        &kum_reg_data);
        kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
-       e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
-                                        kum_reg_data);
+       ret_val =
+               e1000_write_kmrn_reg_80003es2lan(hw,
+                               E1000_KMRNCTRLSTA_INBAND_PARAM, kum_reg_data);
+       if (ret_val)
+               return ret_val;
 
        /* Set the transmit descriptor write-back policy */
        reg_data = er32(TXDCTL(0));
-- 
2.17.2 (Apple Git-113)