else
res = read_child (memaddr, readbuf, len);
- if (res <= 0)
+ /* read_child and write_child return zero on success, non-zero on
+ failure. */
+ if (res != 0)
return TARGET_XFER_E_IO;
- *xfered_len = res;
+ *xfered_len = len;
return TARGET_XFER_OK;
}