Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on media-tree/master] [also build test WARNING on vkoul-dmaengine/next linus/master v6.0-rc2 next-20220822] [cannot apply to xilinx-xlnx/master] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/martin-tuma-digiteqautomotive-com/Digiteq-Automotive-MGB4-driver/20220823-015724 base: git://linuxtv.org/media_tree.git master config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20220823/202208230454.wUB5ighv-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 12.1.0 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 # https://github.com/intel-lab-lkp/linux/commit/54f06e839ff47e3223a38eb48ab44aee9866eb30 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review martin-tuma-digiteqautomotive-com/Digiteq-Automotive-MGB4-driver/20220823-015724 git checkout 54f06e839ff47e3223a38eb48ab44aee9866eb30 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash drivers/media/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/media/pci/mgb4/mgb4_vout.c:202:5: warning: no previous prototype for 'vidioc_g_output' [-Wmissing-prototypes] 202 | int vidioc_g_output(struct file *file, void *priv, unsigned int *i) | ^~~~~~~~~~~~~~~ >> drivers/media/pci/mgb4/mgb4_vout.c:208:5: warning: no previous prototype for 'vidioc_s_output' [-Wmissing-prototypes] 208 | int vidioc_s_output(struct file *file, void *priv, unsigned int i) | ^~~~~~~~~~~~~~~ >> drivers/media/pci/mgb4/mgb4_vout.c:213:5: warning: no previous prototype for 'vidioc_enum_output' [-Wmissing-prototypes] 213 | int vidioc_enum_output(struct file *file, void *priv, struct v4l2_output *out) | ^~~~~~~~~~~~~~~~~~ vim +/vidioc_g_output +202 drivers/media/pci/mgb4/mgb4_vout.c 201 > 202 int vidioc_g_output(struct file *file, void *priv, unsigned int *i) 203 { 204 *i = 0; 205 return 0; 206 } 207 > 208 int vidioc_s_output(struct file *file, void *priv, unsigned int i) 209 { 210 return i ? -EINVAL : 0; 211 } 212 > 213 int vidioc_enum_output(struct file *file, void *priv, struct v4l2_output *out) 214 { 215 if (out->index != 0) 216 return -EINVAL; 217 218 out->type = V4L2_OUTPUT_TYPE_ANALOG; 219 strscpy(out->name, "MGB4", sizeof(out->name)); 220 221 return 0; 222 } 223 -- 0-DAY CI Kernel Test Service https://01.org/lkp
