On 11/12/14 13:56, Srikanth Thokala wrote:
@@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, 
unsigned int devfn,
>         return PCIBIOS_SUCCESSFUL;
>  }
>
>+static int gen_pci_set_msi_parent(struct pci_bus *bus)
>+{
>+       struct gen_pci *pci = bus_to_gen_pci(bus);
>+
>+       bus->msi = pci->mchip;
>+
>+       return PCIBIOS_SUCCESSFUL;
>+}
>+
>  static struct pci_ops gen_pci_ops = {
>         .read   = gen_pci_config_read,
>         .write  = gen_pci_config_write,
>+       .set_msi_parent = gen_pci_set_msi_parent,
We assign the msi chip through add_bus() call, do we still need this?

Certain architecture (i.e arm64) doesn't implement struct hw_pci. Therefore, there is no add_bus(). However, this new API should allow non-arch dependent implementation.

Suravee
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