From 7cebf2ee8b7e39c06c93b593b0848a7baf9e73a8 Mon Sep 17 00:00:00 2001
From: Sean Young <sean@mess.org>
Date: Fri, 20 Jan 2017 10:10:11 -0200
Subject: [PATCH] [media] lirc: fix null dereference for tx-only devices

tx-only RC devices do not have a receive buffer.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/rc/lirc_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index e0e2297f13d1..0030ce01babc 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -468,7 +468,7 @@ int lirc_dev_fop_open(struct inode *inode, struct file *file)
 		if (retval) {
 			module_put(cdev->owner);
 			ir->open--;
-		} else {
+		} else if (ir->buf) {
 			lirc_buffer_clear(ir->buf);
 		}
 		if (ir->task)
-- 
2.20.1