linux-kernel - Re: [PATCH 03/10] vfio: ccw: new SCH

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Message-ID: <20180425102519.16e6195b.cohuck@redhat.com>
Date:   Wed, 25 Apr 2018 10:25:19 +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 03/10] vfio: ccw: new SCH_EVENT event

On Thu, 19 Apr 2018 16:48:06 +0200
Pierre Morel <pmorel@...ux.vnet.ibm.com> wrote:

> The Sub channel event callback is threaded using workqueues.
> The work uses the FSM introducing the VFIO_CCW_EVENT_SCH_EVENT
> event.

I don't think this is a good name; after all, all of the events are
events for the subchannel :)

This seems to be more of a "we need to update the schib" event...
VFIO_CCW_EVENT_SCHIB_CHANGED? _SCH_CHANGED? _UPDATE_NEEDED?

Tbh, I'm not quite sure this makes sense for me yet... will continue
reading, but this probably needs a 'why'.

> The update of the SCHIB is now done inside the FSM function.
> 
> Signed-off-by: Pierre Morel <pmorel@...ux.vnet.ibm.com>
> ---
>  drivers/s390/cio/vfio_ccw_drv.c     | 33 +++++++++++++--------------------
>  drivers/s390/cio/vfio_ccw_fsm.c     | 23 +++++++++++++++++++++++
>  drivers/s390/cio/vfio_ccw_private.h |  3 +++
>  3 files changed, 39 insertions(+), 20 deletions(-)