[PATCH v3 3/8] virtio: hookup irq_get_affinity callback

[Daniel Wagner]

struct bus_type has a new callback for retrieving the IRQ affinity for a
device. Hook this callback up for virtio based devices.

Signed-off-by: Daniel Wagner <w...@kernel.org>
---
 drivers/virtio/virtio.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 
b9095751e43bb7db5fc991b0cc0979d2e86f7b9b..7774aecdfe52d4dce11eb77e43864981a2e2b2bb
 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -377,6 +377,24 @@ static void virtio_dev_remove(struct device *_d)
        of_node_put(dev->dev.of_node);
 }
 
+/**
+ * virtio_irq_get_affinity - get IRQ affinity mask for device
+ * @_d: ptr to dev structure
+ * @irq_vec: interrupt vector number
+ *
+ * Return the CPU affinity mask for @_d and @irq_vec.
+ */
+static const struct cpumask *virtio_irq_get_affinity(struct device *_d,
+                                                    unsigned int irq_veq)
+{
+       struct virtio_device *dev = dev_to_virtio(_d);
+
+       if (!dev->config->get_vq_affinity)
+               return NULL;
+
+       return dev->config->get_vq_affinity(dev, irq_veq);
+}
+
 static const struct bus_type virtio_bus = {
        .name  = "virtio",
        .match = virtio_dev_match,
@@ -384,6 +402,7 @@ static const struct bus_type virtio_bus = {
        .uevent = virtio_uevent,
        .probe = virtio_dev_probe,
        .remove = virtio_dev_remove,
+       .irq_get_affinity = virtio_irq_get_affinity,
 };
 
 int __register_virtio_driver(struct virtio_driver *driver, struct module 
*owner)

-- 
2.47.0