* In single master mode, split the read and write actions.
                 * No special action is needed for write chunks here.
                 */
-               rc = drxbsp_i2c_write_read(dev_addr, bufx, buf, 0, 0, 0);
+               rc = drxbsp_i2c_write_read(dev_addr, bufx, buf,
+                                          NULL, 0, NULL);
                if (rc == 0)
-                       rc = drxbsp_i2c_write_read(0, 0, 0, dev_addr, todo, data);
+                       rc = drxbsp_i2c_write_read(NULL, 0, NULL, dev_addr, todo, data);
 #else
                /* In multi master mode, do everything in one RW action */
                rc = drxbsp_i2c_write_read(dev_addr, bufx, buf, dev_addr, todo,