Messages in this thread | | | Date | Thu, 3 Jun 2021 03:32:46 +0800 | From | kernel test robot <> | Subject | drivers/net/ethernet/micrel/ks8851_common.c:995:6: warning: variable 'ret' set but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 231bc539066760aaa44d46818c85b14ca2f56d9f commit: 797047f875b5463719cc70ba213eb691d453c946 net: ks8851: Implement Parallel bus operations date: 1 year ago config: x86_64-randconfig-a004-20210601 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d41cb6bb2607fa5c7a9df2b3dab361353657d225) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=797047f875b5463719cc70ba213eb691d453c946 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 797047f875b5463719cc70ba213eb691d453c946 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/net/ethernet/micrel/ks8851_common.c:995:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] int ret = 0; ^ 1 warning generated.
vim +/ret +995 drivers/net/ethernet/micrel/ks8851_common.c
3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 985 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 986 /** 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 987 * ks8851_read_selftest - read the selftest memory info. 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 988 * @ks: The device state 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 989 * 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 990 * Read and check the TX/RX memory selftest information. 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 991 */ 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 992 static int ks8851_read_selftest(struct ks8851_net *ks) 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 993 { 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 994 unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 @995 int ret = 0; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 996 unsigned rd; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 997 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 998 rd = ks8851_rdreg16(ks, KS_MBIR); 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 999 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1000 if ((rd & both_done) != both_done) { 0dc7d2b3cbfcf4 drivers/net/ks8851.c Joe Perches 2010-02-27 1001 netdev_warn(ks->netdev, "Memory selftest not finished\n"); 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1002 return 0; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1003 } 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1004 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1005 if (rd & MBIR_TXMBFA) { 0dc7d2b3cbfcf4 drivers/net/ks8851.c Joe Perches 2010-02-27 1006 netdev_err(ks->netdev, "TX memory selftest fail\n"); 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1007 ret |= 1; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1008 } 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1009 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1010 if (rd & MBIR_RXMBFA) { 0dc7d2b3cbfcf4 drivers/net/ks8851.c Joe Perches 2010-02-27 1011 netdev_err(ks->netdev, "RX memory selftest fail\n"); 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1012 ret |= 2; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1013 } 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1014 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1015 return 0; 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1016 } 3ba81f3ece3cfa drivers/net/ks8851.c Ben Dooks 2009-07-16 1017
:::::: The code at line 995 was first introduced by commit :::::: 3ba81f3ece3cfa4ffb06d21ac93b8cad7fbe6a73 net: Micrel KS8851 SPI network driver
:::::: TO: Ben Dooks <ben@simtec.co.uk> :::::: CC: David S. Miller <davem@davemloft.net>
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