Re: [PATCH v2 4/7] vfio/ccw: move private to mdev lifecycle

[Eric Farman <farman@linux.ibm.com>]

On Thu, 2022-11-03 at 19:22 -0400, Matthew Rosato wrote:
> On 11/2/22 11:01 AM, Eric Farman wrote:
> > Now that the mdev parent data is split out into its own struct,
> > it is safe to move the remaining private data to follow the
> > mdev probe/remove lifecycle. The mdev parent data will remain
> > where it is, and follow the subchannel and the css driver
> > interfaces.
> > 
> > Signed-off-by: Eric Farman <farman@linux.ibm.com>
> > ---
> >  drivers/s390/cio/vfio_ccw_drv.c     | 15 +--------------
> >  drivers/s390/cio/vfio_ccw_ops.c     | 26 +++++++++++++------------
> > -
> >  drivers/s390/cio/vfio_ccw_private.h |  2 ++
> >  3 files changed, 16 insertions(+), 27 deletions(-)
> > 
> 
> ...
> 
> > diff --git a/drivers/s390/cio/vfio_ccw_ops.c
> > b/drivers/s390/cio/vfio_ccw_ops.c
> > index eb0b8cc210bb..e45d4acb109b 100644
> > --- a/drivers/s390/cio/vfio_ccw_ops.c
> > +++ b/drivers/s390/cio/vfio_ccw_ops.c
> > @@ -100,15 +100,20 @@ static int vfio_ccw_mdev_probe(struct
> > mdev_device *mdev)
> >  {
> >         struct subchannel *sch = to_subchannel(mdev->dev.parent);
> >         struct vfio_ccw_parent *parent = dev_get_drvdata(&sch-
> > >dev);
> > -       struct vfio_ccw_private *private = dev_get_drvdata(&parent-
> > >dev);
> > +       struct vfio_ccw_private *private;
> >         int ret;
> >  
> > -       if (private->state == VFIO_CCW_STATE_NOT_OPER)
> > -               return -ENODEV;
> > +       private = kzalloc(sizeof(*private), GFP_KERNEL);
> > +       if (!private)
> > +               return -ENOMEM;
> 
> Ha, looks like you time traveled and took my advice :)

Ha, I forgot I did this in the future. :)

> 
> In fact it looks like some of my other comments from patch 1 get
> cleaned up here too -- but would still be good to make those changes
> in patch 1 for completeness/bisect.

Agreed, I'll pull those down to patch 1; thanks.

> 
> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
>