Re: [PATCH] PCI: dwc: layerscape: convert to builtin_platform_driver()

Saravana Kannan
2021-01-20T19:50:37Z

On Wed, Jan 20, 2021 at 11:28 AM Michael Walle <michael@walle.cc> wrote:
>
> [RESEND, fat-fingered the buttons of my mail client and converted
> all CCs to BCCs :(]
>
> Am 2021-01-20 20:02, schrieb Saravana Kannan:
> > On Wed, Jan 20, 2021 at 6:24 AM Rob Herring <robh@kernel.org> wrote:
> >>
> >> On Wed, Jan 20, 2021 at 4:53 AM Michael Walle <michael@walle.cc>
> >> wrote:
> >> >
> >> > fw_devlink will defer the probe until all suppliers are ready. We can't
> >> > use builtin_platform_driver_probe() because it doesn't retry after probe
> >> > deferral. Convert it to builtin_platform_driver().
> >>
> >> If builtin_platform_driver_probe() doesn't work with fw_devlink, then
> >> shouldn't it be fixed or removed?
> >
> > I was actually thinking about this too. The problem with fixing
> > builtin_platform_driver_probe() to behave like
> > builtin_platform_driver() is that these probe functions could be
> > marked with __init. But there are also only 20 instances of
> > builtin_platform_driver_probe() in the kernel:
> > $ git grep ^builtin_platform_driver_probe | wc -l
> > 20
> >
> > So it might be easier to just fix them to not use
> > builtin_platform_driver_probe().
> >
> > Michael,
> >
> > Any chance you'd be willing to help me by converting all these to
> > builtin_platform_driver() and delete builtin_platform_driver_probe()?
>
> If it just moving the probe function to the _driver struct and
> remove the __init annotations. I could look into that.

Yup. That's pretty much it AFAICT.

builtin_platform_driver_probe() also makes sure the driver doesn't ask
for async probe, etc. But I doubt anyone is actually setting async
flags and still using builtin_platform_driver_probe().

-Saravana