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Date:   Tue, 19 May 2020 12:40:37 -0500
From:   Dan Murphy <>
To:     kbuild test robot <>, <>,
        <>, <>,
CC:     <>, <>,
        <>, <>
Subject: Re: [PATCH net-next 2/4] net: phy: dp83869: Set opmode from straps


On 5/19/20 12:19 PM, kbuild test robot wrote:
> Hi Dan,
> I love your patch! Perhaps something to improve:
> [auto build test WARNING on net-next/master]
> [also build test WARNING on robh/for-next sparc-next/master net/master linus/master v5.7-rc6 next-20200518]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see]
> url:
> base: 5cdfe8306631b2224e3f81fc5a1e2721c7a1948b
> config: sh-allmodconfig (attached as .config)
> compiler: sh4-linux-gcc (GCC) 9.3.0
> reproduce:
>          wget -O ~/bin/make.cross
>          chmod +x ~/bin/make.cross
>          # save the attached .config to linux build tree
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <>
> All warnings (new ones prefixed by >>, old ones prefixed by <<):
> drivers/net/phy/dp83869.c: In function 'dp83869_set_strapped_mode':
>>> drivers/net/phy/dp83869.c:171:10: warning: comparison is always false due to limited range of data type [-Wtype-limits]
> 171 |  if (val < 0)

This looks to be a false positive.

phy_read_mmd will return an errno or a value from 0->15

So if errno is returned then this will be true.

Unless I have to do IS_ERR.


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