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From: Dan Carpenter <error27@gmail.com>
To: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: "Antti Palosaari" <crope@iki.fi>,
	"André Goddard Rosa" <andre.goddard@gmail.com>,
	"Jiri Kosina" <jkosina@suse.cz>,
	linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] V4L/DVB: remove unneeded null check in anysee_probe()
Date: Mon, 31 May 2010 19:27:39 +0000	[thread overview]
Message-ID: <20100531192632.GZ5483@bicker> (raw)

Smatch complained because "d" is dereferenced first and then checked for
null later .  The only code path where "d" could be a invalid pointer is
if this is a cold device in dvb_usb_device_init().  I consulted Antti 
Palosaari and he explained that anysee is always a warm device.

I have added a comment and removed the unneeded null check.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/media/dvb/dvb-usb/anysee.c b/drivers/media/dvb/dvb-usb/anysee.c
index faca1ad..aa5c7d5 100644
--- a/drivers/media/dvb/dvb-usb/anysee.c
+++ b/drivers/media/dvb/dvb-usb/anysee.c
@@ -463,6 +463,11 @@ static int anysee_probe(struct usb_interface *intf,
 	if (intf->num_altsetting < 1)
 		return -ENODEV;
 
+	/*
+	 * Anysee is always warm (its USB-bridge, Cypress FX2, uploads
+	 * firmware from eeprom).  If dvb_usb_device_init() succeeds that
+	 * means d is a valid pointer.
+	 */
 	ret = dvb_usb_device_init(intf, &anysee_properties, THIS_MODULE, &d,
 		adapter_nr);
 	if (ret)
@@ -479,10 +484,7 @@ static int anysee_probe(struct usb_interface *intf,
 	if (ret)
 		return ret;
 
-	if (d)
-		ret = anysee_init(d);
-
-	return ret;
+	return anysee_init(d);
 }
 
 static struct usb_device_id anysee_table[] = {

             reply	other threads:[~2010-05-31 19:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-31 19:27 Dan Carpenter [this message]
2010-06-16 15:56 ` [patch] V4L/DVB: remove unneeded null check in anysee_probe() Jiri Kosina
2010-07-05 17:14   ` Mauro Carvalho Chehab

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