Messages in this thread | | | Date | Wed, 23 Mar 2005 18:13:26 +0900 | From | Tejun Heo <> | Subject | Re: [PATCH scsi-misc-2.6 07/08] scsi: remove bogus {get|put}_device() calls |
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Hi,
James Bottomley wrote: > On Wed, 2005-03-23 at 11:14 +0900, Tejun Heo wrote: > >> So, basically, SCSI high-level object (scsi_disk) and >> mid-level object (scsi_device) are reference counted by users, >> not the requests they submit. Reference count cannot go zero >> with active users and users cannot access the object once the >> reference count reaches zero. > > > Actually, no. Unfortunately we still have some fire and forget APIs, so > the contention that we always have an open refcounted descriptor isn't > always true.
Yeap, you're right. So, what we have is
* All high-level users have open access to the scsi high-level object on issueing requests, but may close it before its requests complete. * All mid-layer users do get_device() before submitting requests, but may put_device() before its requests complete.
Thanks for pointing that out. :-)
-- tejun
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