linux-kernel - Re: [PATCH v8 1/4] iio: pressure: bmp280: Use sleep and forced mode for oneshot captures

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Message-ID: <ZwkDoSeXA1T4VD0L@smile.fi.intel.com>
Date: Fri, 11 Oct 2024 13:53:21 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: kernel test robot <lkp@...el.com>
Cc: Vasileios Amoiridis <vassilisamir@...il.com>, jic23@...nel.org,
	lars@...afoo.de, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, llvm@...ts.linux.dev,
	oe-kbuild-all@...ts.linux.dev, ang.iglesiasg@...il.com,
	linus.walleij@...aro.org, biju.das.jz@...renesas.com,
	javier.carrasco.cruz@...il.com, semen.protsenko@...aro.org,
	579lpy@...il.com, ak@...klinger.de, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	christophe.jaillet@...adoo.fr
Subject: Re: [PATCH v8 1/4] iio: pressure: bmp280: Use sleep and forced mode
 for oneshot captures

On Fri, Oct 11, 2024 at 12:32:12PM +0800, kernel test robot wrote:
> Hi Vasileios,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on 96be67caa0f0420d4128cb67f07bbd7a6f49e03a]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Vasileios-Amoiridis/iio-pressure-bmp280-Use-sleep-and-forced-mode-for-oneshot-captures/20241008-035238
> base:   96be67caa0f0420d4128cb67f07bbd7a6f49e03a
> patch link:    https://lore.kernel.org/r/20241007194945.66192-2-vassilisamir%40gmail.com
> patch subject: [PATCH v8 1/4] iio: pressure: bmp280: Use sleep and forced mode for oneshot captures
> config: i386-randconfig-006-20241011 (https://download.01.org/0day-ci/archive/20241011/202410111221.YIeXHxOv-lkp@intel.com/config)
> compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241011/202410111221.YIeXHxOv-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202410111221.YIeXHxOv-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/iio/pressure/bmp280-core.c:1051:3: warning: variable 'meas_time_us' is uninitialized when used here [-Wuninitialized]
>     1051 |                 meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET +
>          |                 ^~~~~~~~~~~~
>    drivers/iio/pressure/bmp280-core.c:1046:32: note: initialize the variable 'meas_time_us' to silence this warning
>     1046 |         unsigned int reg, meas_time_us;
>          |                                       ^
>          |                                        = 0
>    drivers/iio/pressure/bmp280-core.c:2452:2: warning: variable 'offset' is uninitialized when used here [-Wuninitialized]
>     2452 |         offset += sizeof(s32);
>          |         ^~~~~~
>    drivers/iio/pressure/bmp280-core.c:2437:17: note: initialize the variable 'offset' to silence this warning
>     2437 |         int ret, offset;
>          |                        ^
>          |                         = 0

Rarely, but looks like this suggestion is okay, rather I would do it as 'else'
branch and convert '+=' in the 'if' part to be '='.

-- 
With Best Regards,
Andy Shevchenko