netdev - Re: [PATCH v4 2/3] net: ethernet: renesas: Add Ethernet Switch driver

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Date:   Fri, 21 Oct 2022 04:26:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: Re: [PATCH v4 2/3] net: ethernet: renesas: Add Ethernet Switch driver

Hi Yoshihiro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]
[also build test WARNING on net/master robh/for-next linus/master v6.1-rc1 next-20221020]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yoshihiro-Shimoda/net-ethernet-renesas-Add-Ethernet-Switch-driver/20221019-163806
patch link:    https://lore.kernel.org/r/20221019083518.933070-3-yoshihiro.shimoda.uh%40renesas.com
patch subject: [PATCH v4 2/3] net: ethernet: renesas: Add Ethernet Switch driver
config: powerpc-allmodconfig
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/f310f8cc37dfb090cfb06ae38530276327569464
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yoshihiro-Shimoda/net-ethernet-renesas-Add-Ethernet-Switch-driver/20221019-163806
        git checkout f310f8cc37dfb090cfb06ae38530276327569464
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash M=drivers/net/ethernet/renesas

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/renesas/rswitch.c:355:64: warning: shift count >= width of type [-Wshift-count-overflow]
           return __le32_to_cpu(desc->dptrl) | (dma_addr_t)(desc->dptrh) << 32;
                                                                         ^  ~~
   drivers/net/ethernet/renesas/rswitch.c:367:64: warning: shift count >= width of type [-Wshift-count-overflow]
           return __le32_to_cpu(desc->dptrl) | (dma_addr_t)(desc->dptrh) << 32;
                                                                         ^  ~~
   2 warnings generated.


vim +355 drivers/net/ethernet/renesas/rswitch.c

   352	
   353	static dma_addr_t rswitch_ext_desc_get_dptr(struct rswitch_ext_desc *desc)
   354	{
 > 355		return __le32_to_cpu(desc->dptrl) | (dma_addr_t)(desc->dptrh) << 32;
   356	}
   357	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

View attachment "config" of type "text/plain" (322871 bytes)