From f957d1f05a1a20bc3b954877c6562a4d53d58bde Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 4 Feb 2008 23:49:58 -0500
Subject: [PATCH] virtio: configuration change callback
Various drivers want to know when their configuration information
changes: the balloon driver is the immediate user, but the network
driver may one day have a "carrier" status as well.
This introduces that callback (lguest doesn't use it yet).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
include/linux/virtio.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 951d81747b42..78408d5237c1 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -98,12 +98,15 @@ void unregister_virtio_device(struct virtio_device *dev);
* @probe: the function to call when a device is found. Returns a token for
* remove, or PTR_ERR().
* @remove: the function when a device is removed.
+ * @config_changed: optional function to call when the device configuration
+ * changes; may be called in interrupt context.
*/
struct virtio_driver {
struct device_driver driver;
const struct virtio_device_id *id_table;
int (*probe)(struct virtio_device *dev);
void (*remove)(struct virtio_device *dev);
+ void (*config_changed)(struct virtio_device *dev);
};
int register_virtio_driver(struct virtio_driver *drv);
--
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