tree: git://git.infradead.org/users/hch/misc.git nvme-pr-fix head: d5eadfcdbeb0e4f09c22b02955b587321c6300b1 commit: b0e4e1fe3d0665fdd93e9d1f84ab52f24bb8dae8 [4/5] nvme: factor out a is_multipath_disk helper config: x86_64-randconfig-r033-20200816 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e) 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 git checkout b0e4e1fe3d0665fdd93e9d1f84ab52f24bb8dae8 # 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(a)intel.com&gt; All error/warnings (new ones prefixed by >>): ns = nvme_find_path(*head); ^ ns = nvme_find_path(*head); ^ ~~~~~~~~~~~~~~~~~~~~~ 1 warning and 1 error generated. vim +/nvme_find_path +1647 drivers/nvme/host/core.c b0e4e1fe3d0665 Christoph Hellwig 2020-08-14 1634 32acab3181c705 Christoph Hellwig 2017-11-02 1635 /* 32acab3181c705 Christoph Hellwig 2017-11-02 1636 * Issue ioctl requests on the first available path. Note that unlike normal 32acab3181c705 Christoph Hellwig 2017-11-02 1637 * block layer requests we will not retry failed request on another controller. 32acab3181c705 Christoph Hellwig 2017-11-02 1638 */ 240e6ee272c07a Keith Busch 2020-06-29 1639 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk, 32acab3181c705 Christoph Hellwig 2017-11-02 1640 struct nvme_ns_head **head, int *srcu_idx) 1673f1f08c8876 Christoph Hellwig 2015-11-26 1641 { b0e4e1fe3d0665 Christoph Hellwig 2020-08-14 1642 if (is_multipath_disk(disk)) { 100c815cbd5648 Christoph Hellwig 2019-05-17 1643 struct nvme_ns *ns; 100c815cbd5648 Christoph Hellwig 2019-05-17 1644 32acab3181c705 Christoph Hellwig 2017-11-02 1645 *head = disk->private_data; 32acab3181c705 Christoph Hellwig 2017-11-02 1646 *srcu_idx = srcu_read_lock(&(*head)->srcu); 100c815cbd5648 Christoph Hellwig 2019-05-17 @1647 ns = nvme_find_path(*head); 100c815cbd5648 Christoph Hellwig 2019-05-17 1648 if (!ns) 100c815cbd5648 Christoph Hellwig 2019-05-17 1649 srcu_read_unlock(&(*head)->srcu, *srcu_idx); 100c815cbd5648 Christoph Hellwig 2019-05-17 1650 return ns; 32acab3181c705 Christoph Hellwig 2017-11-02 1651 } b0e4e1fe3d0665 Christoph Hellwig 2020-08-14 1652 32acab3181c705 Christoph Hellwig 2017-11-02 1653 *head = NULL; 32acab3181c705 Christoph Hellwig 2017-11-02 1654 *srcu_idx = -1; 32acab3181c705 Christoph Hellwig 2017-11-02 1655 return disk->private_data; 32acab3181c705 Christoph Hellwig 2017-11-02 1656 } 1673f1f08c8876 Christoph Hellwig 2015-11-26 1657 :::::: The code at line 1647 was first introduced by commit :::::: 100c815cbd56480b3e31518475b04719c363614a nvme: fix srcu locking on error return in nvme_get_ns_from_disk :::::: TO: Christoph Hellwig <hch(a)lst.de&gt; :::::: CC: Keith Busch <keith.busch(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org