commit cb97605728fc1d7a15ddc6ab689e8bcd23871133
Author: Chris Lalancette <clalance@redhat.com>
Date:   Thu May 15 09:04:55 2008 -0400

    register_virtio_device was doing something silly, in that it was overwriting
    what the calling driver stuck into .bus_id" for the name.  This caused
    problems in the output of /proc/interrupts, since when you request_irq(),
    it doesn't actually copy the devname you pass in but just stores a pointer
    to the data.  The fix is to just not have register_virtio_device do anything
    with the bus_id, and assume the higher level driver set it up properly.

diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 138a7f0..1556ac2 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -128,7 +128,6 @@ int register_virtio_device(struct virtio_device *dev)
 	int err;
 
 	dev->dev.bus = &virtio_bus;
-	sprintf(dev->dev.bus_id, "%u", dev->index);
 
 	/* We always start by resetting the device, in case a previous
 	 * driver messed it up.  This also tests that code path a little. */