Re: [PATCH v2] media: au0828: Fix green screen in analog

[kernel test robot <lkp@intel.com>]

Hi Bradford,

kernel test robot noticed the following build warnings:



url:    https://github.com/intel-lab-lkp/linux/commits/UPDATE-20260318-180458/Bradford-Love/si2157-Analog-format-fixes/20260314-162352
base:   the 5th patch of https://lore.kernel.org/r/20260312213532.2907276-6-brad%40nextdimension.cc
patch link:    https://lore.kernel.org/r/20260317172820.2959499-1-brad%40nextdimension.cc
patch subject: [PATCH v2] media: au0828: Fix green screen in analog
config: hexagon-randconfig-001-20260319 (https://download.01.org/0day-ci/archive/20260319/202603191517.dqbfX1as-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 4abb927bacf37f18f6359a41639a6d1b3bffffb5)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260319/202603191517.dqbfX1as-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603191517.dqbfX1as-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/usb/au0828/au0828-video.c:1676:23: warning: unused variable 'vdev' [-Wunused-variable]
    1676 |         struct video_device *vdev = video_devdata(file);
         |                              ^~~~
   1 warning generated.


vim +/vdev +1676 drivers/media/usb/au0828/au0828-video.c

  1673	
  1674	static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
  1675	{
> 1676		struct video_device *vdev = video_devdata(file);
  1677		struct au0828_dev *dev = video_drvdata(file);
  1678		int rc;
  1679	
  1680		rc = check_dev(dev);
  1681		if (rc < 0)
  1682			return rc;
  1683	
  1684		/* Workaround for a bug in the au0828 hardware design that
  1685		 * sometimes results in the colorspace being inverted
  1686		 */
  1687		if (dev->greenscreen_detected == 1) {
  1688			dprintk(1, "Detected green frame.  Resetting stream...\n");
  1689			au0828_analog_stream_reset(dev);
  1690			dev->greenscreen_detected = 0;
  1691		}
  1692	
  1693		return vb2_ioctl_dqbuf(file, priv, b);
  1694	}
  1695	

-- 
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