[PATCH] nvme-multipath: Reset bi_disk to ns head when failover

[kernel test robot]

Hi Daniel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on hch-configfs/for-next linus/master v5.12 next-20210503]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Wagner/nvme-multipath-Reset-bi_disk-to-ns-head-when-failover/20210503-210018
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1fe5501ba1abf2b7e78295df73675423bd6899a0
config: x86_64-randconfig-a006-20210503 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/603164e7d6800851ee5366bfaff31084453284bb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Wagner/nvme-multipath-Reset-bi_disk-to-ns-head-when-failover/20210503-210018
        git checkout 603164e7d6800851ee5366bfaff31084453284bb
        # save the attached .config to linux build tree
        make W=1 W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "bdget_disk" [drivers/nvme/host/nvme-core.ko] undefined!

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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