drivers/usb/host/max3421-hcd.o: warning: objtool: max3421_spi_thread() falls through to next function max3421_irq_handler()

drivers/usb/host/max3421-hcd.o: warning: objtool: max3421_spi_thread() falls through to next function max3421_irq_handler()

[kernel test robot]

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CC: linux-kernel(a)vger.kernel.org
TO: Will Deacon <will@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dea8dcf2a9fa8cc540136a6cd885c3beece16ec3
commit: a5460b5e5fb82656807840d40d3deaecad094044 READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE()
date:   9 months ago
config: x86_64-randconfig-r026-20201229 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a5460b5e5fb82656807840d40d3deaecad094044
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a5460b5e5fb82656807840d40d3deaecad094044
        # 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@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/usb/host/max3421-hcd.o: warning: objtool: max3421_spi_thread() falls through to next function max3421_irq_handler()

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

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