PCI/MSI: Use of_msi_get_domain instead of open-coded "msi-parent" parsing

Now that we have a function that implements the complexity of the
"msi-parent" property parsing, switch to that.

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 2e99a50..e112da1 100644 (file)
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 #include <linux/of_pci.h>
 #include "pci.h"
 
@@ -64,27 +65,25 @@ struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
 {
 #ifdef CONFIG_IRQ_DOMAIN
-       struct device_node *np;
        struct irq_domain *d;
 
        if (!bus->dev.of_node)
                return NULL;
 
        /* Start looking for a phandle to an MSI controller. */
-       np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0);
+       d = of_msi_get_domain(&bus->dev, bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
+       if (d)
+               return d;
 
        /*
         * If we don't have an msi-parent property, look for a domain
         * directly attached to the host bridge.
         */
-       if (!np)
-               np = bus->dev.of_node;
-
-       d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI);
+       d = irq_find_matching_host(bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
        if (d)
                return d;
 
-       return irq_find_host(np);
+       return irq_find_host(bus->dev.of_node);
 #else
        return NULL;
 #endif