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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>,
	linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] [media] ddbridge: remove unneeded an NULL check
Date: Sat, 01 Mar 2014 13:55:29 +0000	[thread overview]
Message-ID: <20140301135529.GC23929@elgon.mountain> (raw)

Static checkers complain about the inconsistent NULL check here.

There is an unchecked dereference of "intput->fe" in the call to
tuner_attach_tda18271() and there is a second unchecked dereference a
couple lines later when we do:
	input->fe2->tuner_priv = input->fe->tuner_priv;

But actually "intput->fe" can't be NULL because if demod_attach_drxk()
fails to allocate it, then we would have return an error code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index 9375f30d9a81..fb52bda8d45f 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -876,10 +876,8 @@ static int dvb_input_attach(struct ddb_input *input)
 			return -ENODEV;
 		if (tuner_attach_tda18271(input) < 0)
 			return -ENODEV;
-		if (input->fe) {
-			if (dvb_register_frontend(adap, input->fe) < 0)
-				return -ENODEV;
-		}
+		if (dvb_register_frontend(adap, input->fe) < 0)
+			return -ENODEV;
 		if (input->fe2) {
 			if (dvb_register_frontend(adap, input->fe2) < 0)
 				return -ENODEV;

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>,
	linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] [media] ddbridge: remove unneeded an NULL check
Date: Sat, 1 Mar 2014 16:55:29 +0300	[thread overview]
Message-ID: <20140301135529.GC23929@elgon.mountain> (raw)

Static checkers complain about the inconsistent NULL check here.

There is an unchecked dereference of "intput->fe" in the call to
tuner_attach_tda18271() and there is a second unchecked dereference a
couple lines later when we do:
	input->fe2->tuner_priv = input->fe->tuner_priv;

But actually "intput->fe" can't be NULL because if demod_attach_drxk()
fails to allocate it, then we would have return an error code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index 9375f30d9a81..fb52bda8d45f 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -876,10 +876,8 @@ static int dvb_input_attach(struct ddb_input *input)
 			return -ENODEV;
 		if (tuner_attach_tda18271(input) < 0)
 			return -ENODEV;
-		if (input->fe) {
-			if (dvb_register_frontend(adap, input->fe) < 0)
-				return -ENODEV;
-		}
+		if (dvb_register_frontend(adap, input->fe) < 0)
+			return -ENODEV;
 		if (input->fe2) {
 			if (dvb_register_frontend(adap, input->fe2) < 0)
 				return -ENODEV;

             reply	other threads:[~2014-03-01 13:55 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-01 13:55 Dan Carpenter [this message]
2014-03-01 13:55 ` [patch] [media] ddbridge: remove unneeded an NULL check Dan Carpenter

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