From: Jake Oshins <jakeo@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
---
drivers/pci/probe.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f441d1b..3d5d7d6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -671,6 +671,19 @@ 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) {
+ if (pci_fwnode(bus)) {
+ d = irq_find_matching_fwnode(pci_fwnode(bus),
+ DOMAIN_BUS_PCI_MSI);
+ }
+ }
+#endif
+
return d;
}
--
1.9.1
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