Fix retry failure in nvdimmWriteData()

Need to create a local variable for i_dataLen,
because deviceOp will alter the i_dataLen value
on failure (ie NACK).

Change-Id: If73efb77a1ba918fbc1bb7decd8fb46a5d2014b9
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/82344
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: TSUNG K YEUNG <tyeung@us.ibm.com>
Reviewed-by: Matthew Raybuck <matthew.raybuck@ibm.com>
Reviewed-by: Daniel M Crowell <dcrowell@us.ibm.com>

Author: mderkse1

src/usr/isteps/nvdimm/nvdimmdd.C

@@ -922,6 +922,7 @@ errlHndl_t nvdimmWriteData( TARGETING::Target * i_target,
                ENTER_MRK"nvdimmWriteData()");
     errlHndl_t err = nullptr;
     errlHndl_t err_retryable = nullptr;
+    size_t data_length;
     do
     {
         /***********************************************************/
@@ -931,13 +932,15 @@ errlHndl_t nvdimmWriteData( TARGETING::Target * i_target,
               retry <= NVDIMM_MAX_RETRIES;
               retry++)
         {
+            data_length = i_dataLen;
+
             // Do the actual data write
             if ( i_dataLen == sizeof(uint16_t) )
             {
                 err = deviceOp( DeviceFW::WRITE,
                                 i_target,
                                 i_dataToWrite,
-                                i_dataLen,
+                                data_length,
                                 DeviceFW::I2C,
                                 I2C_SMBUS_RW_W_CMD_PARAMS(
                                     DeviceFW::I2C_SMBUS_WORD_NO_PEC,
@@ -954,7 +957,7 @@ errlHndl_t nvdimmWriteData( TARGETING::Target * i_target,
                 err = deviceOp( DeviceFW::WRITE,
                                 i_target,
                                 i_dataToWrite,
-                                i_dataLen,
+                                data_length,
                                 DEVICE_I2C_ADDRESS_OFFSET(
                                             i_i2cInfo.port,
                                             i_i2cInfo.engine,
@@ -978,7 +981,7 @@ errlHndl_t nvdimmWriteData( TARGETING::Target * i_target,
                            "Write Non-Retryable fail %d/%d/0x%X, "
                            "ldl=%d, offset=0x%X, aS=%d, retry=%d",
                            i_i2cInfo.port, i_i2cInfo.engine,
-                           i_i2cInfo.devAddr, i_dataLen,
+                           i_i2cInfo.devAddr, data_length,
                            i_i2cInfo.offset, i_i2cInfo.addrSize, retry);
 
                  // Printing mux info separately, if combined, nothing is displayed