Hi Jacopo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v4.16-rc2 next-20180220] [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/Jacopo-Mondi/Renesas-Capture-Engine-Unit-CEU-V4L2-driver/20180220-101027 base: git://linuxtv.org/media_tree.git master reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) >> drivers/media/i2c/ov772x.c:386:3: sparse: symbol 'ov772x_pll' was not declared. Should it be >> drivers/media/i2c/ov772x.c:535:14: sparse: symbol 'ov772x_frame_intervals' was not declared. Should it be drivers/media/i2c/ov772x.c: In function 'ov772x_set_frame_rate.isra.2': drivers/media/i2c/ov772x.c:643:7: warning: 'fsize' may be used uninitialized in this function pclk = fps COPYING CREDITS Documentation Kbuild Kconfig LICENSES MAINTAINERS Makefile README arch block certs crypto drivers firmware fs include init ipc kernel lib mm net samples scripts security sound tools usr virt fsize; ~~~~~^~~~~~~~~~~~~ Please review and possibly fold the followup patch. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation