Re: [PATCH v2] ios: track sub IOS devices

[Jose E. Marchesi]

> Hi Jose.
>
> On Sun, Apr 23, 2023 at 03:11:15PM +0200, Jose E. Marchesi wrote:
>> 
>> > In this commit, we keep track of number of sub-devices for each
>> > IO space.  If the user close the super-IOS, it'll become a zombie
>> > IOS: it's dead but the corresponding `struct ios' is not un-allocated
>> > yet.  When user closes the sub-IOS, and if it's the last sub-IOS,
>> > it'll de-allocate the corresponding `struct ios'.
>> 
>> I like this idea.  But I would suggest to move the sub-spaces business
>> completely to the IOS, at this point, instead of keeping a "sub" IOD.
>
> IMHO moving the logic from `ios-dev-sub.c' to `ios.c', only complicates the
> `ios.c' with no obvious benefits.  I think keep the sub IOD is a good thing.

Agreed, the interplay between ios<->iod in this case can help to reduce
replication of logic.  The sub IOD will be special, but no harm in that.

OK for master.
Thanks.