linux-kernel - [PATCH 4.9 35/44] vt: invoke notifier on screen size change

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Message-Id: <20190129113142.753603951@linuxfoundation.org>
Date:   Tue, 29 Jan 2019 12:36:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Nicolas Pitre <nico@...aro.org>
Subject: [PATCH 4.9 35/44] vt: invoke notifier on screen size change

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

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

From: Nicolas Pitre <nicolas.pitre@...aro.org>

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@...aro.org>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -956,6 +956,7 @@ static int vc_do_resize(struct tty_struc
 	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;
 }