[PATCH] media: bcm2835-unicam: Fix querycap multiple caps

[kernel test robot]

Hi Eugen,

kernel test robot noticed the following build errors:

[auto build test ERROR on a87737435cfa134f9cdcc696ba3080759d04cf72]

url:    https://github.com/intel-lab-lkp/linux/commits/Eugen-Hristev/media-bcm2835-unicam-Fix-querycap-multiple-caps/20260611-141320
base:   a87737435cfa134f9cdcc696ba3080759d04cf72
patch link:    https://lore.kernel.org/r/20260611-bcmpiqcap-v1-1-10cf7fb438df%40kernel.org
patch subject: [PATCH] media: bcm2835-unicam: Fix querycap multiple caps
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20260612/202606121013.RsnqIwho-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260612/202606121013.RsnqIwho-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606121013.RsnqIwho-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/media/platform/broadcom/bcm2835-unicam.c:33:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/media/platform/broadcom/bcm2835-unicam.c:1836:20: error: use of undeclared identifier 'node'
    1836 |         if (is_image_node(node))
         |                           ^
   1 warning and 1 error generated.


vim +/node +1836 drivers/media/platform/broadcom/bcm2835-unicam.c

  1825	
  1826	/* -----------------------------------------------------------------------------
  1827	 *  V4L2 video device operations
  1828	 */
  1829	
  1830	static int unicam_querycap(struct file *file, void *priv,
  1831				   struct v4l2_capability *cap)
  1832	{
  1833		strscpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
  1834		strscpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
  1835	
> 1836		if (is_image_node(node))
  1837			cap->capabilities |= V4L2_CAP_VIDEO_CAPTURE;
  1838		else
  1839			cap->capabilities |= V4L2_CAP_META_CAPTURE;
  1840	
  1841		return 0;
  1842	}
  1843	

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