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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Zhouyang Jia <jiazhouyang09@gmail.com>,
        Hans Verkuil <hans.verkuil@cisco.com>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.14 58/87] media: tm6000: add error handling for
 dvb_register_adapter
Thread-Topic: [PATCH AUTOSEL 4.14 58/87] media: tm6000: add error handling for
 dvb_register_adapter
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Date:   Mon, 17 Sep 2018 03:03:01 +0000
Message-ID: <20180917030220.245686-58-alexander.levin@microsoft.com>
References: <20180917030220.245686-1-alexander.levin@microsoft.com>
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From: Zhouyang Jia <jiazhouyang09@gmail.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@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>
---
 drivers/media/usb/tm6000/tm6000-dvb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/usb/tm6000/tm6000-dvb.c b/drivers/media/usb/tm60=
00/tm6000-dvb.c
index 097ac321b7e1..349f578273b6 100644
--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -267,6 +267,11 @@ static int register_dvb(struct tm6000_core *dev)
=20
 	ret =3D 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 =3D dev;
=20
 	if (dvb->frontend) {
--=20
2.17.1