linux-kernel - Re: [PATCH 14/38] media: vivid: move the devnode creation logic to a separate function

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Date:   Thu, 3 Sep 2020 05:57:53 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/38] media: vivid: move the devnode creation logic to a
 separate function

Hi Mauro,

I love your patch! Yet something to improve:

[auto build test ERROR on linuxtv-media/master]
[cannot apply to v5.9-rc3 next-20200902]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Mauro-Carvalho-Chehab/media-sparse-smatch-warn-fixes/20200903-002025
base:   git://linuxtv.org/media_tree.git master
config: s390-randconfig-s031-20200902 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.2-191-g10164920-dirty
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=s390 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   drivers/media/test-drivers/vivid/vivid-core.c: In function 'vivid_create_devnodes':
   drivers/media/test-drivers/vivid/vivid-core.c:1318:11: warning: unused variable 'i' [-Wunused-variable]
    1318 |  int ret, i;
         |           ^
   drivers/media/test-drivers/vivid/vivid-core.c: In function 'vivid_create_instance':
>> drivers/media/test-drivers/vivid/vivid-core.c:1887:47: error: 'cec_tx_bus_cnt' undeclared (first use in this function)
    1887 |  ret = vivid_create_devnodes(pdev, dev, inst, cec_tx_bus_cnt,
         |                                               ^~~~~~~~~~~~~~
   drivers/media/test-drivers/vivid/vivid-core.c:1887:47: note: each undeclared identifier is reported only once for each function it appears in

# https://github.com/0day-ci/linux/commit/cd6461a9795132db179f4416123658efbf8a92b7
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Mauro-Carvalho-Chehab/media-sparse-smatch-warn-fixes/20200903-002025
git checkout cd6461a9795132db179f4416123658efbf8a92b7
vim +/cec_tx_bus_cnt +1887 drivers/media/test-drivers/vivid/vivid-core.c

  1874	
  1875		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_cap);
  1876		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_out);
  1877		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_cap);
  1878		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_out);
  1879		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_rx);
  1880		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_tx);
  1881		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_sdr_cap);
  1882		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_cap);
  1883		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_out);
  1884		v4l2_ctrl_handler_setup(&dev->ctrl_hdl_touch_cap);
  1885	
  1886		/* finally start creating the device nodes */
> 1887		ret = vivid_create_devnodes(pdev, dev, inst, cec_tx_bus_cnt,
  1888					    tvnorms_cap, tvnorms_out,
  1889					    in_type_counter, out_type_counter);
  1890		if (ret)
  1891			goto unreg_dev;
  1892	
  1893		/* Now that everything is fine, let's add it to device list */
  1894		vivid_devs[inst] = dev;
  1895	
  1896		return 0;
  1897	
  1898	unreg_dev:
  1899		vb2_video_unregister_device(&dev->touch_cap_dev);
  1900		vb2_video_unregister_device(&dev->meta_out_dev);
  1901		vb2_video_unregister_device(&dev->meta_cap_dev);
  1902		video_unregister_device(&dev->radio_tx_dev);
  1903		video_unregister_device(&dev->radio_rx_dev);
  1904		vb2_video_unregister_device(&dev->sdr_cap_dev);
  1905		vb2_video_unregister_device(&dev->vbi_out_dev);
  1906		vb2_video_unregister_device(&dev->vbi_cap_dev);
  1907		vb2_video_unregister_device(&dev->vid_out_dev);
  1908		vb2_video_unregister_device(&dev->vid_cap_dev);
  1909		cec_unregister_adapter(dev->cec_rx_adap);
  1910		for (i = 0; i < MAX_OUTPUTS; i++)
  1911			cec_unregister_adapter(dev->cec_tx_adap[i]);
  1912		if (dev->cec_workqueue) {
  1913			vivid_cec_bus_free_work(dev);
  1914			destroy_workqueue(dev->cec_workqueue);
  1915		}
  1916	free_dev:
  1917		v4l2_device_put(&dev->v4l2_dev);
  1918		return ret;
  1919	}
  1920	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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