Re: [v2] [media] Use common error handling code in 20 functions

[SF Markus Elfring <elfring@users.sourceforge.net>]

>> +put_isp:
>> +	omap3isp_put(video->isp);
>> +delete_fh:
>> +	v4l2_fh_del(&handle->vfh);
>> +	v4l2_fh_exit(&handle->vfh);
>> +	kfree(handle);
> 
> Please prefix the error labels with error_.

How often do you really need such an extra prefix?


>> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
>> @@ -994,10 +994,8 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file,
>> void *fh, struct v4l2_queryctrl qc = { .id = ctrl->id };
>>
>>  			ret = uvc_query_v4l2_ctrl(chain, &qc);
>> -			if (ret < 0) {
>> -				ctrls->error_idx = i;
>> -				return ret;
>> -			}
>> +			if (ret < 0)
>> +				goto set_index;
>>
>>  			ctrl->value = qc.default_value;
>>  		}
>> @@ -1013,14 +1011,17 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file,
>> void *fh, ret = uvc_ctrl_get(chain, ctrl);
>>  		if (ret < 0) {
>>  			uvc_ctrl_rollback(handle);
>> -			ctrls->error_idx = i;
>> -			return ret;
>> +			goto set_index;
>>  		}
>>  	}
>>
>>  	ctrls->error_idx = 0;
>>
>>  	return uvc_ctrl_rollback(handle);
>> +
>> +set_index:
>> +	ctrls->error_idx = i;
>> +	return ret;
>>  }
> 
> For uvcvideo I find this to hinder readability

I got an other development view.


> without adding much added value.

There can be a small effect for such a function implementation.


> Please drop the uvcvideo change from this patch.

Would it be nice if this source code adjustment could be integrated also?

Regards,
Markus