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/hvc_xen.c b/drivers/char/hvc_xen.c
index 538ceea5e7d..eba999f8598 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -102,6 +102,7 @@ static struct hv_ops hvc_ops = {
         .put_chars = write_console,
         .notifier_add = notifier_add_irq,
         .notifier_del = notifier_del_irq,
+        .notifier_hangup = notifier_hangup_irq,
 };
 
 static int __init xen_init(void)