On Fri, Apr 21, 2017 at 10:04:45AM +0200, Johannes Thumshirn wrote: > This series re-orders the calls to scsi_remove_host() and sas_remove_host() in > all SAS HBA drivers (apart from mpt3sas which is doing it correctly). This is > for two reasons: > 1) After the change to recursive removal of sysfs entries, we're > trying to remove already removed kobjects when doing a > sas_remove_host() _after_ a scsi_remove_host() > 2) the documentation mandates it even (becuase of 1) > > Unfortunately this does not completely solve issues with recursive sysfs > removals in SAS, as libsas has asynchronous behaviour where strong ordering > would be needed. But I am working on it and I do know other do as well. So if > anyone else (James, Christoph, Bart, I'm looking at you) has an idea, I do > have test setups and I'm willing to take input in form of ideas and patches. > > I also dropped the SDEV_CANCEL state change for now. We re-evaluate it once we > have an idea how to tackle the ordering issues and place it into > sas_unregister_ha() as per James' comment. Any reason to not just make sas_remove_host call scsi_remove_host to ensure we get the ordering right?
