linux-kernel - [PATCH 1/3] [media] dvb-ttusb-budget: Use common error handling code in ttusb

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Date:   Wed, 20 Sep 2017 21:11:33 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/3] [media] dvb-ttusb-budget: Use common error handling code
 in ttusb_probe()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 20 Sep 2017 20:25:24 +0200

Add two jump targets so that a bit of exception handling can be better
reused at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index b842f367249f..38394c9ecc67 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -1675,8 +1675,7 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	if (result < 0) {
 		dprintk("%s: ttusb_alloc_iso_urbs - failed\n", __func__);
 		mutex_unlock(&ttusb->semi2c);
-		kfree(ttusb);
-		return result;
+		goto err_free_usb;
 	}
 
 	if (ttusb_init_controller(ttusb))
@@ -1687,11 +1686,9 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	result = dvb_register_adapter(&ttusb->adapter,
 				      "Technotrend/Hauppauge Nova-USB",
 				      THIS_MODULE, &udev->dev, adapter_nr);
-	if (result < 0) {
-		ttusb_free_iso_urbs(ttusb);
-		kfree(ttusb);
-		return result;
-	}
+	if (result < 0)
+		goto err_free_iso_urbs;
+
 	ttusb->adapter.priv = ttusb;
 
 	/* i2c */
@@ -1762,7 +1759,9 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	i2c_del_adapter(&ttusb->i2c_adap);
 err_unregister_adapter:
 	dvb_unregister_adapter (&ttusb->adapter);
+err_free_iso_urbs:
 	ttusb_free_iso_urbs(ttusb);
+err_free_usb:
 	kfree(ttusb);
 	return result;
 }
-- 
2.14.1