Hi Asutosh, url: https://github.com/0day-ci/linux/commits/Asutosh-Das/Enable-power-managem... base: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next config: i386-randconfig-m021-20210415 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; New smatch warnings: drivers/scsi/ufs/ufshcd.c:9017 ufshcd_wl_resume() error: potentially dereferencing uninitialized 'hba'. drivers/scsi/ufs/ufshcd.c:9141 ufshcd_system_suspend() error: uninitialized symbol 'ret'. drivers/scsi/ufs/ufshcd.c:9166 ufshcd_system_resume() error: uninitialized symbol 'ret'. Old smatch warnings: drivers/scsi/ufs/ufshcd.c:5112 ufshcd_uic_cmd_compl() error: we previously assumed 'hba->active_uic_cmd' could be null (see line 5100) vim +/hba +9017 drivers/scsi/ufs/ufshcd.c 9bad6c1c707d2a Asutosh Das 2021-04-14 8998 9bad6c1c707d2a Asutosh Das 2021-04-14 8999 static int ufshcd_wl_resume(struct device *dev) 9bad6c1c707d2a Asutosh Das 2021-04-14 9000 { 9bad6c1c707d2a Asutosh Das 2021-04-14 9001 struct scsi_device *sdev = to_scsi_device(dev); 9bad6c1c707d2a Asutosh Das 2021-04-14 9002 struct ufs_hba *hba; ^^^ 9bad6c1c707d2a Asutosh Das 2021-04-14 9003 int ret = 0; 9bad6c1c707d2a Asutosh Das 2021-04-14 9004 ktime_t start = ktime_get(); 9bad6c1c707d2a Asutosh Das 2021-04-14 9005 9bad6c1c707d2a Asutosh Das 2021-04-14 9006 if (pm_runtime_suspended(dev)) 9bad6c1c707d2a Asutosh Das 2021-04-14 9007 goto out; ^^^^^^^^ 9bad6c1c707d2a Asutosh Das 2021-04-14 9008 9bad6c1c707d2a Asutosh Das 2021-04-14 9009 hba = shost_priv(sdev->host); 9bad6c1c707d2a Asutosh Das 2021-04-14 9010 9bad6c1c707d2a Asutosh Das 2021-04-14 9011 ret = __ufshcd_wl_resume(hba, UFS_SYSTEM_PM); 9bad6c1c707d2a Asutosh Das 2021-04-14 9012 if (ret) 9bad6c1c707d2a Asutosh Das 2021-04-14 9013 dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); 9bad6c1c707d2a Asutosh Das 2021-04-14 9014 out: 9bad6c1c707d2a Asutosh Das 2021-04-14 9015 trace_ufshcd_wl_resume(dev_name(dev), ret, 9bad6c1c707d2a Asutosh Das 2021-04-14 9016 ktime_to_us(ktime_sub(ktime_get(), start)), 9bad6c1c707d2a Asutosh Das 2021-04-14 @9017 hba->curr_dev_pwr_mode, hba->uic_link_state); ^^^^^^^^^^^^^^^^^^^^^^ Uninitialized. 9bad6c1c707d2a Asutosh Das 2021-04-14 9018 if (!ret) 9bad6c1c707d2a Asutosh Das 2021-04-14 9019 hba->is_sys_suspended = false; 9bad6c1c707d2a Asutosh Das 2021-04-14 9020 up(&hba->host_sem); 9bad6c1c707d2a Asutosh Das 2021-04-14 9021 return ret; 9bad6c1c707d2a Asutosh Das 2021-04-14 9022 } [ snip ] 57d104c153d3d6 Subhash Jadavani 2014-09-25 9131 int ufshcd_system_suspend(struct ufs_hba *hba) 7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29 9132 { 9bad6c1c707d2a Asutosh Das 2021-04-14 9133 int ret; 7ff5ab47363334 Subhash Jadavani 2016-12-22 9134 ktime_t start = ktime_get(); 57d104c153d3d6 Subhash Jadavani 2014-09-25 9135 9bad6c1c707d2a Asutosh Das 2021-04-14 9136 if (pm_runtime_suspended(hba->dev)) 57d104c153d3d6 Subhash Jadavani 2014-09-25 9137 goto out; ^^^^^^^^ 3b1d05807a9a68 Vinayak Holikatti 2013-02-25 9138 9bad6c1c707d2a Asutosh Das 2021-04-14 9139 ret = ufshcd_suspend(hba); 57d104c153d3d6 Subhash Jadavani 2014-09-25 9140 out: 7ff5ab47363334 Subhash Jadavani 2016-12-22 @9141 trace_ufshcd_system_suspend(dev_name(hba->dev), ret, ^^^ "ret" uninitialized. 7ff5ab47363334 Subhash Jadavani 2016-12-22 9142 ktime_to_us(ktime_sub(ktime_get(), start)), 73eba2be9203c0 Subhash Jadavani 2017-01-10 9143 hba->curr_dev_pwr_mode, hba->uic_link_state); 57d104c153d3d6 Subhash Jadavani 2014-09-25 9144 return ret; 57d104c153d3d6 Subhash Jadavani 2014-09-25 9145 } 57d104c153d3d6 Subhash Jadavani 2014-09-25 9146 EXPORT_SYMBOL(ufshcd_system_suspend); 57d104c153d3d6 Subhash Jadavani 2014-09-25 9147 57d104c153d3d6 Subhash Jadavani 2014-09-25 9148 /** 57d104c153d3d6 Subhash Jadavani 2014-09-25 9149 * ufshcd_system_resume - system resume routine 57d104c153d3d6 Subhash Jadavani 2014-09-25 9150 * @hba: per adapter instance 57d104c153d3d6 Subhash Jadavani 2014-09-25 9151 * 57d104c153d3d6 Subhash Jadavani 2014-09-25 9152 * Returns 0 for success and non-zero for failure 57d104c153d3d6 Subhash Jadavani 2014-09-25 9153 */ 57d104c153d3d6 Subhash Jadavani 2014-09-25 9154 57d104c153d3d6 Subhash Jadavani 2014-09-25 9155 int ufshcd_system_resume(struct ufs_hba *hba) 66ec6d59407baf Sujit Reddy Thumma 2013-07-30 9156 { 9bad6c1c707d2a Asutosh Das 2021-04-14 9157 int ret; 7ff5ab47363334 Subhash Jadavani 2016-12-22 9158 ktime_t start = ktime_get(); 7ff5ab47363334 Subhash Jadavani 2016-12-22 9159 9bad6c1c707d2a Asutosh Das 2021-04-14 9160 if (pm_runtime_suspended(hba->dev)) 7ff5ab47363334 Subhash Jadavani 2016-12-22 9161 goto out; 9bad6c1c707d2a Asutosh Das 2021-04-14 9162 9bad6c1c707d2a Asutosh Das 2021-04-14 9163 ret = ufshcd_resume(hba); 9bad6c1c707d2a Asutosh Das 2021-04-14 9164 7ff5ab47363334 Subhash Jadavani 2016-12-22 9165 out: 7ff5ab47363334 Subhash Jadavani 2016-12-22 @9166 trace_ufshcd_system_resume(dev_name(hba->dev), ret, ^^^ ret uninitialized 7ff5ab47363334 Subhash Jadavani 2016-12-22 9167 ktime_to_us(ktime_sub(ktime_get(), start)), 73eba2be9203c0 Subhash Jadavani 2017-01-10 9168 hba->curr_dev_pwr_mode, hba->uic_link_state); 9bad6c1c707d2a Asutosh Das 2021-04-14 9169 7ff5ab47363334 Subhash Jadavani 2016-12-22 9170 return ret; 57d104c153d3d6 Subhash Jadavani 2014-09-25 9171 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org