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Re: [PATCH v10 5/7] PCI: irqdomain: Look up IRQ domain by fwnode_handle

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On 10/12/15 17:53, jakeo@microsoft.com wrote:
> From: Jake Oshins <jakeo@microsoft.com>
> 
> This patch adds a second way of finding an IRQ domain associated with
> a root PCI bus.  After looking to see if one can be found through
> the OF tree, it attempts to look up the IRQ domain through an
> fwnode_handle stored in the pci_sysdata struct.
> 
> Signed-off-by: Jake Oshins <jakeo@microsoft.com>
> ---
>  drivers/pci/probe.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 750f907..c6369dd 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -674,6 +674,20 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
>  	 */
>  	d = pci_host_bridge_of_msi_domain(bus);
>  
> +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
> +	/*
> +	 * If no IRQ domain was found via the OF tree, try looking it up
> +	 * directly through the fwnode_handle.
> +	 */
> +	if (!d) {
> +		struct fwnode_handle *fwnode = pci_root_bus_fwnode(bus);
> +
> +		if (fwnode)
> +			d = irq_find_matching_fwnode(fwnode,
> +						     DOMAIN_BUS_PCI_MSI);
> +	}
> +#endif
> +
>  	return d;
>  }
>  
> 

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>

	M.
-- 
Jazz is not dead. It just smells funny...
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[PATCH v10 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs jakeo@microsoft.com - 2015-12-10 19:00 +0100
  [PATCH v10 3/7] PCI: Make it possible to implement a PCI MSI IRQ Domain in a module. jakeo@microsoft.com - 2015-12-10 19:00 +0100
    Re: [PATCH v10 3/7] PCI: Make it possible to implement a PCI MSI  IRQ Domain in a module. Marc Zyngier <marc.zyngier@arm.com> - 2015-12-10 19:20 +0100
  [PATCH v10 4/7] PCI: Add fwnode_handle to pci_sysdata jakeo@microsoft.com - 2015-12-10 19:00 +0100
    Re: [PATCH v10 4/7] PCI: Add fwnode_handle to pci_sysdata Marc Zyngier <marc.zyngier@arm.com> - 2015-12-10 19:20 +0100
  [PATCH v10 1/7] drivers:hv: Export a function that maps Linux CPU num onto Hyper-V proc num jakeo@microsoft.com - 2015-12-10 19:00 +0100
  [PATCH v10 5/7] PCI: irqdomain: Look up IRQ domain by fwnode_handle jakeo@microsoft.com - 2015-12-10 19:00 +0100
    Re: [PATCH v10 5/7] PCI: irqdomain: Look up IRQ domain by fwnode_handle Marc Zyngier <marc.zyngier@arm.com> - 2015-12-10 19:20 +0100

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