Hi Yuval, [auto build test WARNING on rdma/master] [also build test WARNING on v4.13-rc1 next-20170721] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Yuval-Shaia/IB-rxe-Remove-unneeded-check/20170723-111722 base: https://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma.git master config: xtensa-allyesconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 4.9.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=xtensa Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/infiniband/sw/rxe/rxe_av.c: In function 'rxe_av_chk_attr': >> drivers/infiniband/sw/rxe/rxe_av.c:44:30: warning: 'port' may be used uninitialized in this function [-Wmaybe-uninitialized] if (sgid_index > port->attr.gid_tbl_len) { ^ vim +/port +44 drivers/infiniband/sw/rxe/rxe_av.c 8700e3e7 Moni Shoua 2016-06-16 36 90898850 Dasaratharaman Chandramouli 2017-04-29 37 int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr) 8700e3e7 Moni Shoua 2016-06-16 38 { 8700e3e7 Moni Shoua 2016-06-16 39 struct rxe_port *port; 8700e3e7 Moni Shoua 2016-06-16 40 d8966fcd Dasaratharaman Chandramouli 2017-04-29 41 if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) { d8966fcd Dasaratharaman Chandramouli 2017-04-29 42 u8 sgid_index = rdma_ah_read_grh(attr)->sgid_index; d8966fcd Dasaratharaman Chandramouli 2017-04-29 43 d8966fcd Dasaratharaman Chandramouli 2017-04-29 @44 if (sgid_index > port->attr.gid_tbl_len) { d8966fcd Dasaratharaman Chandramouli 2017-04-29 45 pr_info("invalid sgid index = %d\n", sgid_index); 8700e3e7 Moni Shoua 2016-06-16 46 return -EINVAL; 8700e3e7 Moni Shoua 2016-06-16 47 } 8700e3e7 Moni Shoua 2016-06-16 48 } 8700e3e7 Moni Shoua 2016-06-16 49 8700e3e7 Moni Shoua 2016-06-16 50 return 0; 8700e3e7 Moni Shoua 2016-06-16 51 } 8700e3e7 Moni Shoua 2016-06-16 52 :::::: The code at line 44 was first introduced by commit :::::: d8966fcd4c25708c3a76ea7619644218373df639 IB/core: Use rdma_ah_attr accessor functions :::::: TO: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@xxxxxxxxx> :::::: CC: Doug Ledford <dledford@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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