Zhenmin's checker tool <zli4@cs.uiuc.edu> detected this:

 9. /drivers/pci/hotplug/shpchp_ctrl.c, Line 1575:
 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);

 Maybe change to:
 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__,
 retval);

 I think it is right because at line 1564, the slot is turned off, and
in this line (1575) is checked the status to see if we got an error; if
so, the error number is shown. This number is in 'retval', not in 'rc'
('rc' does have the return of configure_new_device()).

 The patch bellow fixes that: