tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd commit: a66cbdd6573db8515735d37793c22605432c346d mt76: mt7615: introduce mt7663s support date: 4 weeks ago config: nios2-randconfig-s031-20200818 (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-183-gaa6ede3b-dirty git checkout a66cbdd6573db8515735d37793c22605432c346d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/net/wireless/mediatek/mt76/mt7615/sdio_mcu.c:110:62: sparse: sparse: Using plain integer as NULL pointer -- drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c:270:58: sparse: sparse: Using plain integer as NULL pointer # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout a66cbdd6573db8515735d37793c22605432c346d vim +78 drivers/net/wireless/mediatek/mt76/mt7615/sdio_mcu.c 65 66 int mt7663s_driver_own(struct mt7615_dev *dev) 67 { 68 struct sdio_func *func = dev->mt76.sdio.func; 69 struct mt76_phy *mphy = &dev->mt76.phy; 70 u32 status; 71 int ret; 72 73 if (!test_and_clear_bit(MT76_STATE_PM, &mphy->state)) 74 goto out; 75 76 sdio_claim_host(func); 77 79 80 ret = readx_poll_timeout(mt7663s_read_pcr, dev, status, 81 status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000); 82 if (ret < 0) { 83 dev_err(dev->mt76.dev, "Cannot get ownership from device"); 84 set_bit(MT76_STATE_PM, &mphy->state); 85 sdio_release_host(func); 86 87 return ret; 88 } 89 90 sdio_release_host(func); 91 92 out: 93 dev->pm.last_activity = jiffies; 94 95 return 0; 96 } 97 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org