linux-kernel - [PATCH 4.4 030/113] media: tm6000: add error handling for dvb_register

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Date:   Mon,  8 Oct 2018 20:30:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhouyang Jia <jiazhouyang09@...il.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.4 030/113] media: tm6000: add error handling for dvb_register_adapter

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

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

From: Zhouyang Jia <jiazhouyang09@...il.com>

[ 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@...il.com>
[hans.verkuil@...co.com: use pr_err and fix typo: adater -> adapter]
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/media/usb/tm6000/tm6000-dvb.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -275,6 +275,11 @@ static int register_dvb(struct tm6000_co
 
 	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) {