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Subject[PATCH 2/4] [media] usbvision-core: Use common error handling code in usbvision_set_compress_params()
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From: Markus Elfring <elfring@users.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@users.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
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