Comment # 27 on bug 927677 from Dominique Leuenberger

(In reply to Franck Bui from comment #25)
> Thanks.
> 
> The log shows:
> 
>  2050 g_udev_device_get_parent_with_subsystem(0x7f7690002340, 0x43fee7,
> 0x442641, 0)                 = 0x21008a0
>  [...]
>  2050 g_udev_device_get_parent_with_subsystem(0x1fad100, 0x43fee7, 0x442641,
> 0)                      = 0x2100900
> 
> This seems to indicate that udev_device_get_parent_with_subsystem_devtype()
> doesn't fail as it was suggested in comment #9.

We should probably know what the return value was though... only then can we
know what udisks2 interprets out of the udev call