[git:media_tree/master] media: rc: oops in ir_timer_keyup after device unplug

[Mauro Carvalho Chehab <mchehab@s-opensource.com>]

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Subject: media: rc: oops in ir_timer_keyup after device unplug
Author:  Sean Young <sean@mess.org>
Date:    Tue Mar 6 08:57:57 2018 -0500

If there is IR in the raw kfifo when ir_raw_event_unregister() is called,
then kthread_stop() causes ir_raw_event_thread to be scheduled, decode
some scancodes and re-arm timer_keyup. The timer_keyup then fires when
the rc device is long gone.

Cc: stable@vger.kernel.org
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

 drivers/media/rc/rc-main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

---

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 4a952108ba1e..8621761a680f 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1932,12 +1932,12 @@ void rc_unregister_device(struct rc_dev *dev)
 	if (!dev)
 		return;
 
-	del_timer_sync(&dev->timer_keyup);
-	del_timer_sync(&dev->timer_repeat);
-
 	if (dev->driver_type == RC_DRIVER_IR_RAW)
 		ir_raw_event_unregister(dev);
 
+	del_timer_sync(&dev->timer_keyup);
+	del_timer_sync(&dev->timer_repeat);
+
 	rc_free_rx_device(dev);
 
 	mutex_lock(&dev->lock);