[PATCH 4.20 057/352] media: rc: ensure close() is called on rc_unregister_device

[Greg Kroah-Hartman]

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

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

[ Upstream commit 8e782fcf78275f505194e767c515202d4fd274bc ]

If userspace has an open file descriptor on the rc input device or lirc
device when rc_unregister_device() is called, then the rc close() is
never called.

This ensures that the receiver is turned off on the nuvoton-cir driver
during shutdown.

Signed-off-by: Sean Young <sean@xxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/media/rc/rc-main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 877978dbd409..66a174979b3c 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1952,6 +1952,8 @@ void rc_unregister_device(struct rc_dev *dev)
 	rc_free_rx_device(dev);
 
 	mutex_lock(&dev->lock);
+	if (dev->users && dev->close)
+		dev->close(dev);
 	dev->registered = false;
 	mutex_unlock(&dev->lock);
 
-- 
2.19.1