From: Nicolas Pitre <nicolas.pitre@linaro.org>
Date: Wed, 9 Jan 2019 03:55:01 +0000 (-0500)
Subject: vt: invoke notifier on screen size change
X-Git-Tag: v4.9.154~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c13c2a5b1906faab5f2ca318b4e4f9a3e0d4c8a7;p=thirdparty%2Fkernel%2Fstable.git

vt: invoke notifier on screen size change

commit 0c9b1965faddad7534b6974b5b36c4ad37998f8e upstream.

User space using poll() on /dev/vcs devices are not awaken when a
screen size change occurs. Let's fix that.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 9d3e413f48c6a..232cb0a760b90 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -956,6 +956,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
 	if (con_is_visible(vc))
 		update_screen(vc);
 	vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
+	notify_update(vc);
 	return err;
 }