From: Nicolas Pitre <npitre@baylibre.com>
Date: Wed, 11 Jun 2025 01:41:44 +0000 (-0400)
Subject: vt: add missing notification when switching back to text mode
X-Git-Tag: v6.1.146~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dce9d76b73b85a9ca82c5301b0e00043781d7419;p=thirdparty%2Fkernel%2Fstable.git

vt: add missing notification when switching back to text mode

[ Upstream commit ff78538e07fa284ce08cbbcb0730daa91ed16722 ]

Programs using poll() on /dev/vcsa to be notified when VT changes occur
were missing one case: the switch from gfx to text mode.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Link: https://lore.kernel.org/r/9o5ro928-0pp4-05rq-70p4-ro385n21n723@onlyvoer.pbz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ccfd9d93c10c5..f6457263354ba 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4452,6 +4452,7 @@ void do_unblank_screen(int leaving_gfx)
 	set_palette(vc);
 	set_cursor(vc);
 	vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
+	notify_update(vc);
 }
 EXPORT_SYMBOL(do_unblank_screen);