On 02/09/2016 06:28 PM, Lorenzo Pieralisi wrote:

This patch has to be squashed with the previous one otherwise it
has bisectability issues (ie the previous patch passes the parent
to the pci_create_root_bus() call so, without this patch applied,
the companion initialization would fail).

I do not think so. The previous patch passes the parent to the 
pci_create_root_bus(), indeed, so pci_create_root_bus() set companion 
device before calling pcibios_root_bridge_prepare() (for both cases x86 
and ia64). In turn, pcibios_root_bridge_prepare() will do nothing, since 
bridge->dev.parent != NULL. After all, pcibios_root_bridge_prepare() is 
dead code.

Other than that:

Reviewed-by: Lorenzo Pieralisi<redacted>

Thanks!

Tomasz