linux-kernel - [PATCH 2/4] [media] usbvision-core: Use common error handling code in usbvision_set_compress

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Date:   Thu, 21 Sep 2017 17:07:06 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org, Davidlohr Bueso <dave@...olabs.net>,
        Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 2/4] [media] usbvision-core: Use common error handling code in
 usbvision_set_compress_params()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 21 Sep 2017 12:45:49 +0200

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

* Replace the local variable "proc" by the identifier "__func__".

* Use the interface "dev_err" instead of "printk".

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/usb/usbvision/usbvision-core.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/media/usb/usbvision/usbvision-core.c b/drivers/media/usb/usbvision/usbvision-core.c
index 16b76c85eeec..bb6f4f69165f 100644
--- a/drivers/media/usb/usbvision/usbvision-core.c
+++ b/drivers/media/usb/usbvision/usbvision-core.c
@@ -1857,7 +1857,6 @@ int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
 
 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
 {
-	static const char proc[] = "usbvision_set_compresion_params: ";
 	int rc;
 	unsigned char *value = usbvision->ctrl_urb_buffer;
 
@@ -1882,12 +1881,8 @@ static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
 			     USB_DIR_OUT | USB_TYPE_VENDOR |
 			     USB_RECIP_ENDPOINT, 0,
 			     (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
-
-	if (rc < 0) {
-		printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
-		       proc, rc);
-		return rc;
-	}
+	if (rc < 0)
+		goto report_failure;
 
 	if (usbvision->bridge_type == BRIDGE_NT1004) {
 		value[0] =  20; /* PCM Threshold 1 */
@@ -1913,11 +1908,12 @@ static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
 			     USB_DIR_OUT | USB_TYPE_VENDOR |
 			     USB_RECIP_ENDPOINT, 0,
 			     (__u16) USBVISION_PCM_THR1, value, 6, HZ);
+	if (rc < 0)
+report_failure:
+		dev_err(&usbvision->dev->dev,
+			"%s: ERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
+			__func__, rc);
 
-	if (rc < 0) {
-		printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
-		       proc, rc);
-	}
 	return rc;
 }
 
-- 
2.14.1