linux-kernel - Re: sound/soc/intel/catpt/loader.c:654 catpt_first_boot_firmware() warn: consider using resource

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Date:   Mon, 23 Nov 2020 12:53:17 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Cezary Rojewski <cezary.rojewski@...el.com>,
        kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: Re: sound/soc/intel/catpt/loader.c:654 catpt_first_boot_firmware()
 warn: consider using resource_size() here

On Sun, Nov 22, 2020 at 03:52:27AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   27bba9c532a8d21050b94224ffd310ad0058c353
> commit: 6cbfa11d2694b8a1e46d6834fb9705d5589e3ef1 ASoC: Intel: Select catpt and deprecate haswell
> date:   7 weeks ago
> config: x86_64-randconfig-m001-20201122 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> smatch warnings:
> sound/soc/intel/catpt/loader.c:654 catpt_first_boot_firmware() warn: consider using resource_size() here

...

> a9aa6fb3eb6c7e Cezary Rojewski 2020-09-29  652  	for (res = cdev->dram.child; res->sibling; res = res->sibling)
> a9aa6fb3eb6c7e Cezary Rojewski 2020-09-29  653  		;
> a9aa6fb3eb6c7e Cezary Rojewski 2020-09-29 @654  	__request_region(&cdev->dram, res->end + 1,


This sounds like false positive. From where it gets the idea of resource_size()
for the *start* offset?!

-- 
With Best Regards,
Andy Shevchenko