[PATCH v2 2/2] nvme: Add abrupt shutdown support

[kernel test robot]

Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on pavel-linux-leds/for-next]
[also build test ERROR on linus/master v5.14-rc3 next-20210723]
[cannot apply to linux-nvme/for-next]
[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/shiva-linuxworks-gmail-com/Abrupt-Shutdown-for-NVMe-SSD/20210726-212459
base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
config: nios2-randconfig-p002-20210726 (attached as .config)
compiler: nios2-linux-gcc (GCC) 10.3.0
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
        # https://github.com/0day-ci/linux/commit/929817804ad19d2760e156c539dbec82638c35c3
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review shiva-linuxworks-gmail-com/Abrupt-Shutdown-for-NVMe-SSD/20210726-212459
        git checkout 929817804ad19d2760e156c539dbec82638c35c3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=nios2 

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 >>):

   drivers/nvme/host/core.c: In function 'nvme_shutdown_ctrl':
>> drivers/nvme/host/core.c:2164:6: error: implicit declaration of function 'pm_power_loss_imminent' [-Werror=implicit-function-declaration]
    2164 |  if (pm_power_loss_imminent())
         |      ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/pm_power_loss_imminent +2164 drivers/nvme/host/core.c

  2155	
  2156	int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl)
  2157	{
  2158		unsigned long timeout = jiffies + (ctrl->shutdown_timeout * HZ);
  2159		u32 csts;
  2160		int ret;
  2161	
  2162		ctrl->ctrl_config &= ~NVME_CC_SHN_MASK;
  2163	
> 2164		if (pm_power_loss_imminent())
  2165			ctrl->ctrl_config |= NVME_CC_SHN_ABRUPT;
  2166		else
  2167			ctrl->ctrl_config |= NVME_CC_SHN_NORMAL;
  2168	
  2169		ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config);
  2170		if (ret)
  2171			return ret;
  2172	
  2173		while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) {
  2174			if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT)
  2175				break;
  2176	
  2177			msleep(100);
  2178			if (fatal_signal_pending(current))
  2179				return -EINTR;
  2180			if (time_after(jiffies, timeout)) {
  2181				dev_err(ctrl->device,
  2182					"Device shutdown incomplete; abort shutdown\n");
  2183				return -ENODEV;
  2184			}
  2185		}
  2186	
  2187		return ret;
  2188	}
  2189	EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl);
  2190	

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