[PATCH 0/2] Fix IOMMU setup for hotplugged devices on pseries

[Shawn Anastasio]

On 9/5/19 4:38 AM, Lukas Wunner wrote:
> On Wed, Sep 04, 2019 at 11:22:13PM -0500, Shawn Anastasio wrote:
>> If anybody has more insight or a better way to fix this, please let me know.
> 
> Have you considered moving the invocation of pcibios_setup_device()
> to pcibios_bus_add_device()?
> 
> The latter is called from pci_bus_add_device() in drivers/pci/bus.c.
> At this point device_add() has been called, so the device exists in
> sysfs.
> 
> Basically when adding a PCI device, the order is:
> 
> * pci_device_add() populates struct pci_dev, calls device_add(),
>    binding the device to a driver is prevented
> * after pci_device_add() has been called for all discovered devices,
>    resources are allocated
> * pci_bus_add_device() is called for each device,
>    calls pcibios_bus_add_device() and binds the device to a driver

Thank you, this is exactly what I was looking for! Just tested and
this seems to work perfectly. I'll go ahead and submit a v2 that
does this instead.

Thanks again,
Shawn