Re: BUG in libata from ata_sas_port_alloc

["Darrick J. Wong" <djwong@us.ibm.com>]

James Bottomley wrote:

> The problem is that memory obtained by devm_kzalloc() cannot be returned
> by kfree() ... they come from different allocation lists.  The solution
> is probably to have a corresponding ata_probe_ent_free(), I just don't
> exactly see how to tell if the object came from the devm_kzalloc or not
> (unless it gets marked).

Just a shot in the dark, but could we simply make whatever changes are
necessary to make all sas-ata LLDDs managed and then use devm_kzalloc?
Though (and I may be totally wrong here) if it's the case that
devres_head is made (or not made) to be part of a list _only_ before we
reach ata_probe_ent_alloc, we could put a similar if check into the free
function.

--D