linux-kernel - drivers/net/ethernet/renesas/rswitch.c:355:71: warning: left shift count >= width of type

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Date:   Sat, 22 Oct 2022 23:23:02 +0800
From:   kernel test robot <lkp@...el.com>
To:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        0day robot <lkp@...el.com>
Subject: drivers/net/ethernet/renesas/rswitch.c:355:71: warning: left shift
 count >= width of type

tree:   https://github.com/intel-lab-lkp/linux/commits/Yoshihiro-Shimoda/net-phy-marvell10g-Add-host-speed-setting-by-an-ethernet-driver/20221020-091402
head:   54882d9015d6bc070075b3ab4eab5cf4d75cf56e
commit: 77bfe15a20a8c80e2150e86970e1157acfca24f8 net: ethernet: renesas: Add Ethernet Switch driver
date:   3 days ago
config: parisc64-allyesconfig
compiler: hppa-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/77bfe15a20a8c80e2150e86970e1157acfca24f8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yoshihiro-Shimoda/net-phy-marvell10g-Add-host-speed-setting-by-an-ethernet-driver/20221020-091402
        git checkout 77bfe15a20a8c80e2150e86970e1157acfca24f8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/media/platform/chips-media/ drivers/net/ethernet/renesas/ drivers/staging/vt6655/

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: In function 'rswitch_ext_desc_get_dptr':
>> drivers/net/ethernet/renesas/rswitch.c:355:71: warning: left shift count >= width of type [-Wshift-count-overflow]
     355 |         return __le32_to_cpu(desc->dptrl) | (dma_addr_t)(desc->dptrh) << 32;
         |                                                                       ^~
   drivers/net/ethernet/renesas/rswitch.c: In function 'rswitch_ext_ts_desc_get_dptr':
   drivers/net/ethernet/renesas/rswitch.c:367:71: warning: left shift count >= width of type [-Wshift-count-overflow]
     367 |         return __le32_to_cpu(desc->dptrl) | (dma_addr_t)(desc->dptrh) << 32;
         |                                                                       ^~


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" (315985 bytes)