Re: [PATCH v2 1/1] s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem

[Pierre Morel]

On 19/02/2019 10:44, Christian Borntraeger wrote:
> On 19.02.2019 10:22, Cornelia Huck wrote:
> > On Mon, 18 Feb 2019 19:08:48 +0100
> > Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote:

...snip...

> > > +static struct bus_type matrix_bus = {
> > > +	.name = "vfio_ap",
> > > +	.match = &matrix_bus_match,
> > > +};
> > > +
> > > +static int matrix_probe(struct device *dev)
> > > +{
> > > +	return 0;
> > > +}
> >
> > I don't think you need this (the important function is the match
> > function of the bus).
>
> Yes, with
>
> diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
> index 8e45559795429..8ceec41afe322 100644
> --- a/drivers/s390/crypto/vfio_ap_drv.c
> +++ b/drivers/s390/crypto/vfio_ap_drv.c
> @@ -68,15 +68,9 @@ static struct bus_type matrix_bus = {
>          .match = &matrix_bus_match,
>   };
>   
> -static int matrix_probe(struct device *dev)
> -{
> -       return 0;
> -}
> -
>   static struct device_driver matrix_driver = {
>          .name = "vfio_ap",
>          .bus = &matrix_bus,
> -       .probe = matrix_probe,
>   };
>   
>   static int vfio_ap_matrix_dev_create(void)
>
> on top things still look fine.

OK, simpler is better, I remove the probe.

Thanks,
Pierre

--
Pierre Morel
Linux/KVM/QEMU in BÃblingen - Germany