linux-kernel - [PATCH 09/18] [media] RedRat3: Move a variable assignment in redrat3_dev

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Date:   Thu, 13 Oct 2016 18:30:48 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org, Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sean Young <sean@...s.org>,
        Wolfram Sang <wsa-dev@...g-engineering.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 09/18] [media] RedRat3: Move a variable assignment in
 redrat3_dev_probe()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 13 Oct 2016 14:07:03 +0200

* One local variable was set to an error code before a concrete
  error situation was detected. Thus move the corresponding assignment
  into three if branches to indicate a memory allocation failure there.

* Adjust a jump label according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/rc/redrat3.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c
index f6c21a1..f85117b 100644
--- a/drivers/media/rc/redrat3.c
+++ b/drivers/media/rc/redrat3.c
@@ -912,7 +912,7 @@ static int redrat3_dev_probe(struct usb_interface *intf,
 	struct usb_endpoint_descriptor *ep_out = NULL;
 	u8 addr, attrs;
 	int pipe, i;
-	int retval = -ENOMEM;
+	int retval;
 
 	uhi = intf->cur_altsetting;
 
@@ -951,21 +951,27 @@ static int redrat3_dev_probe(struct usb_interface *intf,
 
 	/* allocate memory for our device state and initialize it */
 	rr3 = kzalloc(sizeof(*rr3), GFP_KERNEL);
-	if (!rr3)
+	if (!rr3) {
+		retval = -ENOMEM;
 		goto no_endpoints;
+	}
 
 	rr3->dev = &intf->dev;
 
 	/* set up bulk-in endpoint */
 	rr3->read_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!rr3->read_urb)
-		goto error;
+	if (!rr3->read_urb) {
+		retval = -ENOMEM;
+		goto delete_rr;
+	}
 
 	rr3->ep_in = ep_in;
 	rr3->bulk_in_buf = usb_alloc_coherent(udev,
 		le16_to_cpu(ep_in->wMaxPacketSize), GFP_KERNEL, &rr3->dma_in);
-	if (!rr3->bulk_in_buf)
-		goto error;
+	if (!rr3->bulk_in_buf) {
+		retval = -ENOMEM;
+		goto delete_rr;
+	}
 
 	pipe = usb_rcvbulkpipe(udev, ep_in->bEndpointAddress);
 	usb_fill_bulk_urb(rr3->read_urb, udev, pipe, rr3->bulk_in_buf,
@@ -982,7 +988,7 @@ static int redrat3_dev_probe(struct usb_interface *intf,
 	/* might be all we need to do? */
 	retval = redrat3_enable_detector(rr3);
 	if (retval < 0)
-		goto error;
+		goto delete_rr;
 
 	/* store current hardware timeout, in µs */
 	rr3->hw_timeout = redrat3_get_timeout(rr3);
@@ -996,7 +1002,7 @@ static int redrat3_dev_probe(struct usb_interface *intf,
 	rr3->led.brightness_set = redrat3_brightness_set;
 	retval = led_classdev_register(&intf->dev, &rr3->led);
 	if (retval)
-		goto error;
+		goto delete_rr;
 
 	atomic_set(&rr3->flash, 0);
 	rr3->flash_urb = usb_alloc_urb(0, GFP_KERNEL);
@@ -1028,7 +1034,7 @@ static int redrat3_dev_probe(struct usb_interface *intf,
 
 led_free_error:
 	led_classdev_unregister(&rr3->led);
-error:
+delete_rr:
 	redrat3_delete(rr3, rr3->udev);
 
 no_endpoints:
-- 
2.10.1