[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.pi...@linaro.org>

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 <n...@linaro.org>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 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;
 }