linux-kernel - Re: [PATCH v6 2/2] Input: add Imagis touchscreen driver

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Message-ID: <202202231213.Vj9yo4tW-lkp@intel.com>
Date:   Wed, 23 Feb 2022 12:59:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Markuss Broks <markuss.broks@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Markuss Broks <markuss.broks@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Henrik Rydberg <rydberg@...math.org>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 2/2] Input: add Imagis touchscreen driver

Hi Markuss,

I love your patch! Perhaps something to improve:

[auto build test WARNING on dtor-input/next]
[also build test WARNING on linux/master robh/for-next linus/master v5.17-rc5 next-20220222]
[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/Markuss-Broks/Add-support-for-Imagis-touchscreens/20220223-043645
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20220223/202202231213.Vj9yo4tW-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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/bc77ee5e0d7309edca7d65925c6afa05334b0b01
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Markuss-Broks/Add-support-for-Imagis-touchscreens/20220223-043645
        git checkout bc77ee5e0d7309edca7d65925c6afa05334b0b01
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/input/touchscreen/

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/input/touchscreen/imagis.c:300:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (input_device_enabled(ts->input_dev))
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/touchscreen/imagis.c:305:9: note: uninitialized use occurs here
           return ret;
                  ^~~
   drivers/input/touchscreen/imagis.c:300:2: note: remove the 'if' if its condition is always true
           if (input_device_enabled(ts->input_dev))
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/touchscreen/imagis.c:296:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   drivers/input/touchscreen/imagis.c:316:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (input_device_enabled(ts->input_dev))
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/touchscreen/imagis.c:321:9: note: uninitialized use occurs here
           return ret;
                  ^~~
   drivers/input/touchscreen/imagis.c:316:2: note: remove the 'if' if its condition is always true
           if (input_device_enabled(ts->input_dev))
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/touchscreen/imagis.c:312:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   2 warnings generated.


vim +300 drivers/input/touchscreen/imagis.c

   291	
   292	static int __maybe_unused imagis_suspend(struct device *dev)
   293	{
   294		struct i2c_client *client = to_i2c_client(dev);
   295		struct imagis_ts *ts = i2c_get_clientdata(client);
   296		int ret;
   297	
   298		mutex_lock(&ts->input_dev->mutex);
   299	
 > 300		if (input_device_enabled(ts->input_dev))
   301			ret = imagis_stop(ts);
   302	
   303		mutex_unlock(&ts->input_dev->mutex);
   304	
   305		return ret;
   306	}
   307	

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