[PATCH 4.20 091/117] vt: always call notifier with the console lock held

[Greg Kroah-Hartman]

4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>

commit 7e1d226345f89ad5d0216a9092c81386c89b4983 upstream.

Every invocation of notify_write() and notify_update() is performed
under the console lock, except for one case. Let's fix that.

Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/tty/vt/vt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2764,8 +2764,8 @@ rescan_last_byte:
 	con_flush(vc, draw_from, draw_to, &draw_x);
 	vc_uniscr_debug_check(vc);
 	console_conditional_schedule();
-	console_unlock();
 	notify_update(vc);
+	console_unlock();
 	return n;
 }