From: Zhouyang Jia <jiazhouyang09@gmail.com>
Date: Mon, 11 Jun 2018 04:39:20 +0000 (-0400)
Subject: media: tm6000: add error handling for dvb_register_adapter
X-Git-Tag: v4.9.131~62
X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=68fc12437bb33e6c8c65a36050a5bcb8469da6ab;p=linux

media: tm6000: add error handling for dvb_register_adapter

[ Upstream commit e95d7c6eb94c634852eaa5ff4caf3db05b5d2e86 ]

When dvb_register_adapter fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling dvb_register_adapter.

Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
[hans.verkuil@cisco.com: use pr_err and fix typo: adater -> adapter]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/media/usb/tm6000/tm6000-dvb.c b/drivers/media/usb/tm6000/tm6000-dvb.c
index 0426b210383b..ee88ae83230c 100644
--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -273,6 +273,11 @@ static int register_dvb(struct tm6000_core *dev)
 
 	ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 					THIS_MODULE, &dev->udev->dev, adapter_nr);
+	if (ret < 0) {
+		pr_err("tm6000: couldn't register the adapter!\n");
+		goto err;
+	}
+
 	dvb->adapter.priv = dev;
 
 	if (dvb->frontend) {