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virtio: unify config_changed handling

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Replace duplicated code in all transports with a single wrapper in
virtio.c.

The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.

As this must not happen in practice, this does not look like a big deal.

See also commit 3fff0179e3
	virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Michael S. Tsirkin
2014-10-14 10:40:34 +10:30
committed by Rusty Russell
parent 6fbc198cf6
commit 016c98c6fe
7 changed files with 17 additions and 28 deletions
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9
drivers/virtio/virtio.c
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@@ -239,6 +239,15 @@ void unregister_virtio_device(struct virtio_device *dev)
}
EXPORT_SYMBOL_GPL(unregister_virtio_device);
void virtio_config_changed(struct virtio_device *dev)
{
struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
if (drv && drv->config_changed)
drv->config_changed(dev);
}
EXPORT_SYMBOL_GPL(virtio_config_changed);
static int virtio_init(void)
{
if (bus_register(&virtio_bus) != 0)