[PATCH v2 04/15] virtio: defer config changed notifications

Cornelia Huck
Mon, 06 Oct 2014 15:25:25 -0000

On Mon, 6 Oct 2014 18:10:55 +0300
"Michael S. Tsirkin" <mst at redhat.com> wrote:

> Defer config changed notifications that arrive during
> probe/scan/freeze/restore.
>
> This will allow drivers to set DRIVER_OK earlier, without worrying about
> racing with config change interrupts.
>
> This change will also benefit old hypervisors (before 2009)
> that send interrupts without checking DRIVER_OK: previously,
> the callback could race with driver-specific initialization.
>
> This will also help simplify drivers.
>
> Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> ---
>  include/linux/virtio.h  |  6 ++++++
>  drivers/virtio/virtio.c | 57
+++++++++++++++++++++++++++++++++++++++++--------
>  2 files changed, 54 insertions(+), 9 deletions(-)

Reviewed-by: Cornelia Huck <cornelia.huck at de.ibm.com>