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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Zwlh9rxuEcxSu37C@vamoirid-laptop>
Date: Fri, 11 Oct 2024 19:35:50 +0200
From: Vasileios Aoiridis <vassilisamir@...il.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: kernel test robot <lkp@...el.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 01:53:21PM +0300, Andy Shevchenko wrote:
> 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 '='.

Hi Andy,

I though exactly the same, thanks for confirming my thoughts and thanks
for taking the time to suggest it!

Cheers,
Vasilis

> 
> -- 
> With Best Regards,
> Andy Shevchenko
> 
>