linux-kernel - Re: [PATCH 1/5] media: mt9p031: Add support for 8 bit and 10 bit formats

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Date:   Fri, 25 Sep 2020 18:30:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Stefan Riedmueller <s.riedmueller@...tec.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     kbuild-all@...ts.01.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-kernel@...r.kernel.org, Christian Hemp <c.hemp@...tec.de>,
        Jan Luebbe <jlu@...gutronix.de>,
        Stefan Riedmueller <s.riedmueller@...tec.de>
Subject: Re: [PATCH 1/5] media: mt9p031: Add support for 8 bit and 10 bit
 formats

Hi Stefan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v5.9-rc6 next-20200924]
[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/Stefan-Riedmueller/media-mt9p031-Add-support-for-8-bit-and-10-bit-formats/20200925-155251
base:   git://linuxtv.org/media_tree.git master
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/1863bce6d7b4791c048a25ec07ff8aec8b4847cf
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Stefan-Riedmueller/media-mt9p031-Add-support-for-8-bit-and-10-bit-formats/20200925-155251
        git checkout 1863bce6d7b4791c048a25ec07ff8aec8b4847cf
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 

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

All warnings (new ones prefixed by >>):

>> drivers/media/i2c/mt9p031.c:166:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     166 | static const u32 mt9p031_find_datafmt(struct mt9p031 *mt9p031, u32 code)
         |        ^~~~~

vim +166 drivers/media/i2c/mt9p031.c

   165	
 > 166	static const u32 mt9p031_find_datafmt(struct mt9p031 *mt9p031, u32 code)
   167	{
   168		int i;
   169	
   170		for (i = 0; i < mt9p031->num_fmts; i++)
   171			if (mt9p031->fmts[i] == code)
   172				return mt9p031->fmts[i];
   173	
   174		return mt9p031->fmts[mt9p031->num_fmts-1];
   175	}
   176	

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

Download attachment ".config.gz" of type "application/gzip" (65321 bytes)