[PATCH 5.2 019/143] auxdisplay: panel: need to delete scan_timer when misc_register fails in panel_attach

[Greg Kroah-Hartman]

[ Upstream commit b33d567560c1aadf3033290d74d4fd67af47aa61 ]

In panel_attach, if misc_register fails, we need to delete scan_timer,
which was setup in keypad_init->init_scan_timer.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: zhengbin <zhengbin13@xxxxxxxxxx>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/auxdisplay/panel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index e06de63497cf8..e6bd727da503a 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1617,6 +1617,8 @@ static void panel_attach(struct parport *port)
 	return;
 
 err_lcd_unreg:
+	if (scan_timer.function)
+		del_timer_sync(&scan_timer);
 	if (lcd.enabled)
 		charlcd_unregister(lcd.charlcd);
 err_unreg_device:
-- 
2.20.1