hvc_console: Add a hangup notifier for backends

I have added a hangup notifier that can be used by hvc console
backends to handle a tty hangup. The default irq hangup notifier
calls the notifier_del_irq() for compatibility.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index d0f4eb6fdb7..3fb0d2c88ba 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -198,6 +198,7 @@ static int __devinit virtcons_probe(struct virtio_device *dev)
         virtio_cons.put_chars = put_chars;
         virtio_cons.notifier_add = notifier_add_vio;
         virtio_cons.notifier_del = notifier_del_vio;
+        virtio_cons.notifier_hangup = notifier_del_vio;
 
         /* The first argument of hvc_alloc() is the virtual console number, so
          * we use zero.  The second argument is the parameter for the