From: Sean Young <sean@mess.org>
Date: Sun, 4 Nov 2018 10:12:09 +0000 (-0500)
Subject: media: rc: ensure close() is called on rc_unregister_device
X-Git-Tag: rel_imx_4.19.35_1.1.0~6823
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=da77b546055c07793c6ae9f6d781d6cb598b7b69;p=linux.git

media: rc: ensure close() is called on rc_unregister_device

[ 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@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 8b2c16dd58bd..0f218afdadaa 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1956,6 +1956,8 @@ 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);