linux-kernel - Re: [PATCH 09/10] vfio: ccw: Suppressing the BOXED state

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Message-ID: <20180425104429.582618f8.cohuck@redhat.com>
Date:   Wed, 25 Apr 2018 10:44:29 +0200
From:   Cornelia Huck <cohuck@...hat.com>
To:     Pierre Morel <pmorel@...ux.vnet.ibm.com>
Cc:     pasic@...ux.vnet.ibm.com, bjsdjshi@...ux.vnet.ibm.com,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH 09/10] vfio: ccw: Suppressing the BOXED state

On Thu, 19 Apr 2018 16:48:12 +0200
Pierre Morel <pmorel@...ux.vnet.ibm.com> wrote:

> VFIO_CCW_STATE_BOXED and VFIO_CCW_STATE_BUSY are the same
> states.
> Let's only keep one: VFIO_CCW_STATE_BUSY
> 
> Signed-off-by: Pierre Morel <pmorel@...ux.vnet.ibm.com>
> ---
>  drivers/s390/cio/vfio_ccw_fsm.c     | 9 ---------
>  drivers/s390/cio/vfio_ccw_private.h | 1 -
>  2 files changed, 10 deletions(-)

I think they were initially supposed to cover two different things:
- BUSY: we're currently dealing with an I/O request
- BOXED: the device currently won't talk to us or we won't talk to it

It seems we never really did anything useful with BOXED; but should we?