Re: [PATCH 1/2] pci: Add pci device even if the driver failed to attach

[Rajat Jain]

On Fri, Jun 26, 2020 at 8:39 AM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> Nit: when you update these patches, can you run "git log --oneline
> drivers/pci/bus.c" and make your subject lines match the convention?

Sorry, will do.

> E.g.,
>
>   PCI: Add device even if driver attach failed
>
> On Thu, Jun 25, 2020 at 05:27:09PM -0700, Rajat Jain wrote:
> > device_attach() returning failure indicates a driver error
> > while trying to probe the device. In such a scenario, the PCI
> > device should still be added in the system and be visible to
> > the user.
>
> Nit: please wrap logs to fill 75 characters.  "git log" adds 4 spaces
> at the beginning, so 75+4 still fits nicely in 80 columns without
> wrapping.

Sorry, will do.

>
> > This patch partially reverts:
> > commit ab1a187bba5c ("PCI: Check device_attach() return value always")
> >
> > Signed-off-by: Rajat Jain <rajatja@xxxxxxxxxx>
> > ---
> >  drivers/pci/bus.c | 6 +-----
> >  1 file changed, 1 insertion(+), 5 deletions(-)
> >
> > diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
> > index 8e40b3e6da77d..3cef835b375fd 100644
> > --- a/drivers/pci/bus.c
> > +++ b/drivers/pci/bus.c
> > @@ -322,12 +322,8 @@ void pci_bus_add_device(struct pci_dev *dev)
> >
> >       dev->match_driver = true;
> >       retval = device_attach(&dev->dev);
> > -     if (retval < 0 && retval != -EPROBE_DEFER) {
> > +     if (retval < 0 && retval != -EPROBE_DEFER)
> >               pci_warn(dev, "device attach failed (%d)\n", retval);
> > -             pci_proc_detach_device(dev);
> > -             pci_remove_sysfs_dev_files(dev);
>
> Thanks for catching my bug!
>
> > -             return;
> > -     }
> >
> >       pci_dev_assign_added(dev, true);
> >  }
> > --
> > 2.27.0.212.ge8ba1cc988-goog
> >