diff options
| author | Marc Zyngier <[email protected]> | 2015-07-28 14:46:13 +0100 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2015-07-30 00:14:37 +0200 |
| commit | 471c931cb248ab7af0cd62503d811239b47f217b (patch) | |
| tree | 02a784c22c030dd382b609df45d9dd0a6192e618 | |
| parent | b165e2b60b39888a7ff8efbc1de40137471dda41 (diff) | |
PCI/MSI: Allow msi_domain lookup using the host bridge node
A number of platforms do not need to use the msi-parent property,
as the host bridge itself provides the MSI controller.
Allow this configuration by performing an irq domain lookup based
on the host bridge node if it doesn't have a valid msi-parent property.
Acked-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Cc: <[email protected]>
Cc: Yijing Wang <[email protected]>
Cc: Ma Jun <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Duc Dang <[email protected]>
Cc: Hanjun Guo <[email protected]>
Cc: Jiang Liu <[email protected]>
Cc: Jason Cooper <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
| -rw-r--r-- | drivers/pci/of.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index 85844d8c3efd..2e99a500cb83 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -72,8 +72,13 @@ struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus) /* Start looking for a phandle to an MSI controller. */ np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0); + + /* + * If we don't have an msi-parent property, look for a domain + * directly attached to the host bridge. + */ if (!np) - return NULL; + np = bus->dev.of_node; d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI); if (d) |