Hi, I love your patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [cannot apply to v5.3-rc7 next-20190904] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/dongchun-zhu-mediatek-com/media-i2c-dw9768-Add-DT-support-and-MAINTAINERS-entry/20190908-044622 base: git://linuxtv.org/media_tree.git master config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sh If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/media/i2c/dw9768.c: In function 'dw9768_write_smbus': >> drivers/media/i2c/dw9768.c:82:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized] return ret; ^~~ vim +/ret +82 drivers/media/i2c/dw9768.c 70 71 static int dw9768_write_smbus(struct dw9768 *dw9768, unsigned char reg, 72 unsigned char value) 73 { 74 struct i2c_client *client = v4l2_get_subdevdata(&dw9768->sd); 75 int ret; 76 77 if (reg == DW9768_CMD_DELAY && value == DW9768_CMD_DELAY) 78 usleep_range(DW9768_CTRL_DELAY_US, 79 DW9768_CTRL_DELAY_US + 100); 80 else 81 ret = i2c_smbus_write_byte_data(client, reg, value); > 82 return ret; 83 } 84 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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