Re: [PATCH v2] driver core: Check drivers_autoprobe for all added devices

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Oct 21, 2025 at 12:49:21PM +0000, Vincent Liu wrote:
> > On 14 Oct 2025, at 13:10, Vincent Liu <vincent.liu@nutanix.com> wrote:
> > 
> > On 14 Oct 2025, at 06:14, Greg KH <gregkh@linuxfoundation.org> wrote:
> > 
> >> What commit id does this fix?
> > 
> > I am not entirely sure if there is a particular commit that causes this issue,
> > the device_attach call was added in pci/bus.c 58d9a38f6fac, and then the
> > device_add was removed in 4f535093cf8f6. At this point I think the
> > drivers_autoprobe stopped working because driver_attach that’s left in
> > pci_bus_add_device does not check for that.
> > 
> > The drivers_autoprobe check in base/bus.c has been there a long time 
> > since b8c5cec23d5c.
> > 
> >> What devices cause this to happen today that are seeing this issue?
> > 
> > I am observing this for hot-plugged PCIe devices and VFs.
> > 
> >> Should this be backported to older kernels?
> > 
> > I suppose not since this was not working for a long time?
> > 
> 
> Are you happy with this reply Greg? Do you want me to update the commit
> message to include some of these commit ids?

Please do.