linux-kernel - Re: [PATCH v1 2/2] media: staging: tegra-vde: Support V4L stateless video decoder API

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Date:   Thu, 13 Jan 2022 04:05:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Nicolas Dufresne <nicolas@...fresne.ca>
Cc:     kbuild-all@...ts.01.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] media: staging: tegra-vde: Support V4L stateless
 video decoder API

Hi Dmitry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on media-tree/master]
[also build test WARNING on next-20220112]
[cannot apply to v5.16]
[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/Dmitry-Osipenko/Add-V4L-stateless-video-decoder-API-support-to-NVIDIA-Tegra-driver/20220112-234115
base:   git://linuxtv.org/media_tree.git master
config: powerpc-randconfig-s031-20220112 (https://download.01.org/0day-ci/archive/20220113/202201130310.BFtsDEXe-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/3b11791070fd9de6cd368f28578ebab731386a83
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dmitry-Osipenko/Add-V4L-stateless-video-decoder-API-support-to-NVIDIA-Tegra-driver/20220112-234115
        git checkout 3b11791070fd9de6cd368f28578ebab731386a83
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/staging/media/tegra-vde/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/staging/media/tegra-vde/h264_reader.c:57:15: sparse: sparse: cast to restricted __be32
>> drivers/staging/media/tegra-vde/h264_reader.c:57:15: sparse: sparse: cast to restricted __be32
>> drivers/staging/media/tegra-vde/h264_reader.c:57:15: sparse: sparse: cast to restricted __be32
>> drivers/staging/media/tegra-vde/h264_reader.c:57:15: sparse: sparse: cast to restricted __be32

vim +57 drivers/staging/media/tegra-vde/h264_reader.c

    44	
    45	static inline u8 emulation_escape(struct bitstream_reader *reader, u32 offset,
    46					  u8 data, bool inc_offset, bool *escaped)
    47	{
    48		u32 seq;
    49	
    50		if (data != 0x03 || !reader->rbsp_mode)
    51			return data;
    52	
    53		if (offset < 2 || offset == reader->bitstream_end)
    54			return data;
    55	
    56		seq = *((u32 *)(reader->data_ptr + offset - 2));
  > 57		seq = be32_to_cpu(seq);
    58	
    59		switch (seq) {
    60		case 0x00000300:
    61		case 0x00000301:
    62		case 0x00000302:
    63		case 0x00000303:
    64			if (inc_offset)
    65				reader->data_offset++;
    66	
    67			if (escaped)
    68				*escaped = true;
    69	
    70			return seq & 0xFF;
    71		default:
    72			break;
    73		}
    74	
    75		return data;
    76	}
    77	

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