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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>
This commit is contained in:
Marc Zyngier 2015-09-18 14:07:40 +01:00
parent 61c08240a1
commit c8d175883e
1 changed files with 6 additions and 7 deletions
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13
drivers/pci/of.c
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@ -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