tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 16fa1cf1ed2a652a483cf8f1ea65c703693292e8 commit: 1b3fa5cf859bce7094ac18d32f54af8a7148ad51 [35/39] net: ll_temac: Cleanup multicast filter on change config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 1b3fa5cf859bce7094ac18d32f54af8a7148ad51 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sh
If you fix the issue, kindly add following tag Reported-by: kbuild test robot <l...@intel.com> 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/net/ethernet/xilinx/ll_temac_main.c: In function 'temac_device_reset': >> drivers/net/ethernet/xilinx/ll_temac_main.c:456:6: warning: 'i' may be used >> uninitialized in this function [-Wmaybe-uninitialized] int i; ^ vim +/i +456 drivers/net/ethernet/xilinx/ll_temac_main.c 8ea7a37c5a drivers/net/ll_temac_main.c Steven J. Magnani 2010-02-17 451 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 452 static void temac_set_multicast_list(struct net_device *ndev) 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 453 { 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 454 struct temac_local *lp = netdev_priv(ndev); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 455 u32 multi_addr_msw, multi_addr_lsw; 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 @456 int i; 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 457 unsigned long flags; 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 458 bool promisc_mode_disabled = false; 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 459 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 460 if (ndev->flags & (IFF_PROMISC | IFF_ALLMULTI) || 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 461 (netdev_mc_count(ndev) > MULTICAST_CAM_TABLE_NUM)) { 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 462 temac_indirect_out32(lp, XTE_AFM_OFFSET, XTE_AFM_EPPRM_MASK); 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 463 dev_info(&ndev->dev, "Promiscuous mode enabled.\n"); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 464 return; 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 465 } 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 466 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 467 spin_lock_irqsave(lp->indirect_lock, flags); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 468 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 469 if (!netdev_mc_empty(ndev)) { 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 470 struct netdev_hw_addr *ha; 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 471 f9dcbcc9e3 drivers/net/ll_temac_main.c Jiri Pirko 2010-02-23 472 i = 0; 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 473 netdev_for_each_mc_addr(ha, ndev) { 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 474 if (WARN_ON(i >= MULTICAST_CAM_TABLE_NUM)) 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 475 break; 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 476 multi_addr_msw = ((ha->addr[3] << 24) | 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 477 (ha->addr[2] << 16) | 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 478 (ha->addr[1] << 8) | 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 479 (ha->addr[0])); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 480 temac_indirect_out32_locked(lp, XTE_MAW0_OFFSET, 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 481 multi_addr_msw); 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 482 multi_addr_lsw = ((ha->addr[5] << 8) | 22bedad3ce drivers/net/ll_temac_main.c Jiri Pirko 2010-04-01 483 (ha->addr[4]) | (i << 16)); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 484 temac_indirect_out32_locked(lp, XTE_MAW1_OFFSET, 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 485 multi_addr_lsw); f9dcbcc9e3 drivers/net/ll_temac_main.c Jiri Pirko 2010-02-23 486 i++; 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 487 } 1b3fa5cf85 drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 488 } 1b3fa5cf85 drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 489 1b3fa5cf85 drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 490 /* Clear all or remaining/unused address table entries */ 1b3fa5cf85 drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 491 while (i < MULTICAST_CAM_TABLE_NUM) { 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 492 temac_indirect_out32_locked(lp, XTE_MAW0_OFFSET, 0); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 493 temac_indirect_out32_locked(lp, XTE_MAW1_OFFSET, i << 16); 1b3fa5cf85 drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 494 i++; 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 495 } 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 496 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 497 /* Enable address filter block if currently disabled */ 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 498 if (temac_indirect_in32_locked(lp, XTE_AFM_OFFSET) 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 499 & XTE_AFM_EPPRM_MASK) { 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 500 temac_indirect_out32_locked(lp, XTE_AFM_OFFSET, 0); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 501 promisc_mode_disabled = true; 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 502 } 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 503 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 504 spin_unlock_irqrestore(lp->indirect_lock, flags); 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 505 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 506 if (promisc_mode_disabled) 1bd33bf0fe drivers/net/ethernet/xilinx/ll_temac_main.c Esben Haabendal 2019-05-23 507 dev_info(&ndev->dev, "Promiscuous mode disabled.\n"); 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 508 } 9274498953 drivers/net/ll_temac_main.c Grant Likely 2009-04-25 509 :::::: The code at line 456 was first introduced by commit :::::: 92744989533cbe85e8057935d230e128810168ce net: add Xilinx ll_temac device driver :::::: TO: Grant Likely <grant.lik...@secretlab.ca> :::::: CC: David S. Miller <da...@davemloft.net> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: application/gzip
