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path: root/drivers/pci/probe.c
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-rw-r--r--drivers/pci/probe.c43
1 files changed, 38 insertions, 5 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8361d27e5eca..f14a970b61fa 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1622,15 +1622,48 @@ static void pci_init_capabilities(struct pci_dev *dev)
pci_enable_acs(dev);
}
+/*
+ * This is the equivalent of pci_host_bridge_msi_domain that acts on
+ * devices. Firmware interfaces that can select the MSI domain on a
+ * per-device basis should be called from here.
+ */
+static struct irq_domain *pci_dev_msi_domain(struct pci_dev *dev)
+{
+ struct irq_domain *d;
+
+ /*
+ * If a domain has been set through the pcibios_add_device
+ * callback, then this is the one (platform code knows best).
+ */
+ d = dev_get_msi_domain(&dev->dev);
+ if (d)
+ return d;
+
+ /*
+ * Let's see if we have a firmware interface able to provide
+ * the domain.
+ */
+ d = pci_msi_get_device_domain(dev);
+ if (d)
+ return d;
+
+ return NULL;
+}
+
static void pci_set_msi_domain(struct pci_dev *dev)
{
+ struct irq_domain *d;
+
/*
- * If no domain has been set through the pcibios_add_device
- * callback, inherit the default from the bus device.
+ * If the platform or firmware interfaces cannot supply a
+ * device-specific MSI domain, then inherit the default domain
+ * from the host bridge itself.
*/
- if (!dev_get_msi_domain(&dev->dev))
- dev_set_msi_domain(&dev->dev,
- dev_get_msi_domain(&dev->bus->dev));
+ d = pci_dev_msi_domain(dev);
+ if (!d)
+ d = dev_get_msi_domain(&dev->bus->dev);
+
+ dev_set_msi_domain(&dev->dev, d);
}
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)