Hi Sakari,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on next-20201015]
[cannot apply to v5.9]
[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/Sakari-Ailus/Link-frequency-helper-for-receivers/20201013-233742
base:   git://linuxtv.org/media_tree.git master
config: x86_64-randconfig-a012-20201015 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project e7b4feea8e1bf520b34ad8c116abab6677344b74)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/cf4ab5e39eb042b02f1d5660b5cbd88197a05520
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sakari-Ailus/Link-frequency-helper-for-receivers/20201013-233742
        git checkout cf4ab5e39eb042b02f1d5660b5cbd88197a05520
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/media/pci/intel/ipu3/ipu3-cio2.c:308:50: warning: format specifies type 'long' but the argument has type 's64' (aka 'long long') [-Wformat]
                   dev_err(dev, "error %ld, invalid link_freq\n", freq);
                                       ~~~                        ^~~~
                                       %lld
   include/linux/dev_printk.h:104:32: note: expanded from macro 'dev_err'
           _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
                                 ~~~     ^~~~~~~~~~~
   drivers/media/pci/intel/ipu3/ipu3-cio2.c:301:6: warning: unused variable 'r' [-Wunused-variable]
           int r;
               ^
   2 warnings generated.

vim +308 drivers/media/pci/intel/ipu3/ipu3-cio2.c

   293	
   294	/* Calculate the the delay value for termination enable of clock lane HS Rx */
   295	static int cio2_csi2_calc_timing(struct cio2_device *cio2, struct cio2_queue *q,
   296					 struct cio2_csi2_timing *timing,
   297					 unsigned int bpp, unsigned int lanes)
   298	{
   299		struct device *dev = &cio2->pci_dev->dev;
   300		s64 freq;
   301		int r;
   302	
   303		if (!q->sensor)
   304			return -ENODEV;
   305	
   306		freq = v4l2_get_link_rate(q->sensor->ctrl_handler, bpp, lanes);
   307		if (freq < 0) {
 > 308			dev_err(dev, "error %ld, invalid link_freq\n", freq);
   309			return freq;
   310		}
   311	
   312		timing->clk_termen = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_A,
   313						    CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_B,
   314						    freq,
   315						    CIO2_CSIRX_DLY_CNT_TERMEN_DEFAULT);
   316		timing->clk_settle = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_A,
   317						    CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_B,
   318						    freq,
   319						    CIO2_CSIRX_DLY_CNT_SETTLE_DEFAULT);
   320		timing->dat_termen = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_A,
   321						    CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_B,
   322						    freq,
   323						    CIO2_CSIRX_DLY_CNT_TERMEN_DEFAULT);
   324		timing->dat_settle = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_A,
   325						    CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_B,
   326						    freq,
   327						    CIO2_CSIRX_DLY_CNT_SETTLE_DEFAULT);
   328	
   329		dev_dbg(dev, "freq ct value is %d\n", timing->clk_termen);
   330		dev_dbg(dev, "freq cs value is %d\n", timing->clk_settle);
   331		dev_dbg(dev, "freq dt value is %d\n", timing->dat_termen);
   332		dev_dbg(dev, "freq ds value is %d\n", timing->dat_settle);
   333	
   334		return 0;
   335	};
   336	

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