e1000e: Invalid Image CSUM bit changed for I217

On I217, the bit that indicates an invalid EEPROM (NVM) image checksum has
changed from previous ICH/PCH LOMs.  When validating the EEPROM checksum,
check the appropriate bit on different devices.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

2 files changed, 25 insertions, 8 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h
index 20735327a7a0..7326ea2fef8f 100644
--- a/drivers/net/ethernet/intel/e1000e/defines.h
+++ b/drivers/net/ethernet/intel/e1000e/defines.h
@@ -639,6 +639,10 @@
 /* NVM Word Offsets */
 #define NVM_COMPAT                 0x0003
 #define NVM_ID_LED_SETTINGS        0x0004
+#define NVM_FUTURE_INIT_WORD1      0x0019
+#define NVM_COMPAT_VALID_CSUM      0x0001
+#define NVM_FUTURE_INIT_WORD1_VALID_CSUM        0x0040
+
 #define NVM_INIT_CONTROL2_REG      0x000F
 #define NVM_INIT_CONTROL3_PORT_B   0x0014
 #define NVM_INIT_3GIO_3            0x001A
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 976336547607..7d5f6b7856e6 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -2949,19 +2949,32 @@ static s32 e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw)
 {
         s32 ret_val;
         u16 data;
+        u16 word;
+        u16 valid_csum_mask;
 
-        /* Read 0x19 and check bit 6.  If this bit is 0, the checksum
-         * needs to be fixed.  This bit is an indication that the NVM
-         * was prepared by OEM software and did not calculate the
-         * checksum...a likely scenario.
+        /* Read NVM and check Invalid Image CSUM bit.  If this bit is 0,
+         * the checksum needs to be fixed.  This bit is an indication that
+         * the NVM was prepared by OEM software and did not calculate
+         * the checksum...a likely scenario.
          */
-        ret_val = e1000_read_nvm(hw, 0x19, 1, &data);
+        switch (hw->mac.type) {
+        case e1000_pch_lpt:
+                word = NVM_COMPAT;
+                valid_csum_mask = NVM_COMPAT_VALID_CSUM;
+                break;
+        default:
+                word = NVM_FUTURE_INIT_WORD1;
+                valid_csum_mask = NVM_FUTURE_INIT_WORD1_VALID_CSUM;
+                break;
+        }
+
+        ret_val = e1000_read_nvm(hw, word, 1, &data);
         if (ret_val)
                 return ret_val;
 
-        if (!(data & 0x40)) {
-                data |= 0x40;
-                ret_val = e1000_write_nvm(hw, 0x19, 1, &data);
+        if (!(data & valid_csum_mask)) {
+                data |= valid_csum_mask;
+                ret_val = e1000_write_nvm(hw, word, 1, &data);
                 if (ret_val)
                         return ret_val;
                 ret_val = e1000e_update_nvm_checksum(hw);