Hi Laurent, I love your patch! Perhaps something to improve: [auto build test WARNING on v5.6-rc6] [also build test WARNING on next-20200318] [cannot apply to linuxtv-media/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Laurent-Pinchart/v4l2-dev-ioctl-... base: fb33c6510d5595144d585aa194d377cf74d31911 config: x86_64-randconfig-s1-20200319 (attached as .config) compiler: gcc-7 (Debian 7.5.0-5) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/media/pci/ivtv/ivtv-ioctl.c: In function 'ivtv_enum_fmt_vid_cap': { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:925:3: note: (near initialization for 'hm12.mbus_code') { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:925:8: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:925:11: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:925:11: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:925:14: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:925:14: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:930:3: warning: braces around scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:930:3: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:930:8: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:930:8: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:930:11: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:930:11: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:930:14: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:930:14: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c: In function 'ivtv_enum_fmt_vid_out': drivers/media/pci/ivtv/ivtv-ioctl.c:951:3: warning: braces around scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:951:3: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:951:8: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:951:8: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:951:11: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:951:11: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:951:14: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:951:14: note: (near initialization for 'hm12.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:956:3: warning: braces around scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:956:3: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:956:8: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:956:8: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:956:11: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:956:11: note: (near initialization for 'mpeg.mbus_code') drivers/media/pci/ivtv/ivtv-ioctl.c:956:14: warning: excess elements in scalar initializer { 0, 0, 0, 0 } ^ drivers/media/pci/ivtv/ivtv-ioctl.c:956:14: note: (near initialization for 'mpeg.mbus_code') vim +925 drivers/media/pci/ivtv/ivtv-ioctl.c 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 919 3f038d80039f60 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2008-05-29 920 static int ivtv_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) 3f038d80039f60 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2008-05-29 921 { bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 922 static const struct v4l2_fmtdesc hm12 = { bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 923 0, V4L2_BUF_TYPE_VIDEO_CAPTURE, 0, 368f080b6870e6 drivers/media/video/ivtv/ivtv-ioctl.c Ian Armstrong 2007-11-05 924 "HM12 (YUV 4:2:0)", V4L2_PIX_FMT_HM12, 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 @925 { 0, 0, 0, 0 } bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 926 }; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 927 static const struct v4l2_fmtdesc mpeg = { bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 928 0, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FMT_FLAG_COMPRESSED, 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 929 "MPEG", V4L2_PIX_FMT_MPEG, 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 930 { 0, 0, 0, 0 } 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 931 }; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 932 struct ivtv *itv = fh2id(fh)->itv; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 933 struct ivtv_stream *s = &itv->streams[fh2id(fh)->type]; 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 934 bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 935 if (fmt->index) bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 936 return -EINVAL; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 937 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 938 *fmt = mpeg; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 939 else if (s->type == IVTV_ENC_STREAM_TYPE_YUV) bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 940 *fmt = hm12; bfd063cebb75d3 drivers/media/pci/ivtv/ivtv-ioctl.c Hans Verkuil 2012-10-01 941 else 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 942 return -EINVAL; 3f038d80039f60 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2008-05-29 943 return 0; 1a0adaf37c30e8 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2007-04-27 944 } 3f038d80039f60 drivers/media/video/ivtv/ivtv-ioctl.c Hans Verkuil 2008-05-29 945 :::::: The code at line 925 was first introduced by commit :::::: 1a0adaf37c30e89e44d1470ef604a930999a5826 V4L/DVB (5345): ivtv driver for Conexant cx23416/cx23415 MPEG encoder/decoder :::::: TO: Hans Verkuil <hverkuil(a)xs4all.nl&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)infradead.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org