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

[Michael Walle]

Am 2021-01-20 15:23, schrieb Rob Herring:
> On Wed, Jan 20, 2021 at 4:53 AM Michael Walle <michael@xxxxxxxx> 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? Then we're not fixing drivers later
> when folks start caring about deferred probe and devlink.
>
> I'd really prefer if we convert this to a module instead. (And all the
> other PCI host drivers.)

I briefly looked into adding a remove() op. But I don't know what will
have to be undo of the ls_pcie_host_init(). That would be up to the
maintainers of this driver.

_But_ I'd really like to see PCI working on my board again ;) At
least until the end of this development cycle.

-michael

> > Fixes: e590474768f1 ("driver core: Set fw_devlink=on by default")
>
> This happened!?
>
> > Signed-off-by: Michael Walle <michael@xxxxxxxx>
> > ---
> >  drivers/pci/controller/dwc/pci-layerscape.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-layerscape.c 
> > b/drivers/pci/controller/dwc/pci-layerscape.c
> > index 44ad34cdc3bc..5b9c625df7b8 100644
> > --- a/drivers/pci/controller/dwc/pci-layerscape.c
> > +++ b/drivers/pci/controller/dwc/pci-layerscape.c
> > @@ -232,7 +232,7 @@ static const struct of_device_id 
> > ls_pcie_of_match[] = {
> >         { },
> >  };
> >
> > -static int __init ls_pcie_probe(struct platform_device *pdev)
> > +static int ls_pcie_probe(struct platform_device *pdev)
> >  {
> >         struct device *dev = &pdev->dev;
> >         struct dw_pcie *pci;
> > @@ -271,10 +271,11 @@ static int __init ls_pcie_probe(struct 
> > platform_device *pdev)
> >  }
> >
> >  static struct platform_driver ls_pcie_driver = {
> > +       .probe = ls_pcie_probe,
> >         .driver = {
> >                 .name = "layerscape-pcie",
> >                 .of_match_table = ls_pcie_of_match,
> >                 .suppress_bind_attrs = true,
> >         },
> >  };
> > -builtin_platform_driver_probe(ls_pcie_driver, ls_pcie_probe);
> > +builtin_platform_driver(ls_pcie_driver);
> > --
> > 2.20.1