Hi Sreekanth, url: https://github.com/0day-ci/linux/commits/Sreekanth-Reddy/mpt3sas-Add-supp... base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: s390-randconfig-m031-20201009 (attached as .config) compiler: s390-linux-gcc (GCC) 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/mpt3sas/mpt3sas_scsih.c:5940 _scsih_look_and_get_matched_port_entry() error: uninitialized symbol 'matched_code'. Old smatch warnings: drivers/scsi/mpt3sas/mpt3sas_scsih.c:5949 _scsih_look_and_get_matched_port_entry() error: uninitialized symbol 'matched_code'. drivers/scsi/mpt3sas/mpt3sas_scsih.c:5961 _scsih_look_and_get_matched_port_entry() error: uninitialized symbol 'matched_code'. drivers/scsi/mpt3sas/mpt3sas_scsih.c:6472 _scsih_expander_add() warn: returning -1 instead of -ENOMEM is sloppy drivers/scsi/mpt3sas/mpt3sas_scsih.c:10234 _mpt3sas_fw_work() warn: inconsistent indenting vim +/matched_code +5940 drivers/scsi/mpt3sas/mpt3sas_scsih.c 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5909 static enum hba_port_matched_codes 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5910 _scsih_look_and_get_matched_port_entry(struct MPT3SAS_ADAPTER *ioc, 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5911 struct hba_port *port_entry, 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5912 struct hba_port **matched_port_entry, int *count) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5913 { 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5914 struct hba_port *port_table_entry, *matched_port = NULL; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5915 enum hba_port_matched_codes matched_code; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5916 int lcount = 0; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5917 *matched_port_entry = NULL; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5918 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5919 list_for_each_entry(port_table_entry, &ioc->port_table_list, list) { 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5920 if (!(port_table_entry->flags & HBA_PORT_FLAG_DIRTY_PORT)) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5921 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5922 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5923 if ((port_table_entry->sas_address == port_entry->sas_address) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5924 && (port_table_entry->phy_mask == port_entry->phy_mask)) { 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5925 matched_code = MATCHED_WITH_ADDR_AND_PHYMASK; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5926 matched_port = port_table_entry; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5927 break; This is a break statement. 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5928 } 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5929 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5930 if ((port_table_entry->sas_address == port_entry->sas_address) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5931 && (port_table_entry->phy_mask & port_entry->phy_mask) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5932 && (port_table_entry->port_id == port_entry->port_id)) { This is only true if "port_table_entry->port_id == port_entry->port_id" 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5933 matched_code = MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5934 matched_port = port_table_entry; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5935 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5936 } 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5937 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5938 if ((port_table_entry->sas_address == port_entry->sas_address) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5939 && (port_table_entry->phy_mask & port_entry->phy_mask)) { 2756bd46f6fdde Sreekanth Reddy 2020-10-09 @5940 if (matched_code == ^^^^^^^^^^^^ Possibly uninitialized. Smatch only complains about the first intance otherwise it would probably complain about after the loop as well. 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5941 MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5942 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5943 matched_code = MATCHED_WITH_ADDR_AND_SUBPHYMASK; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5944 matched_port = port_table_entry; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5945 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5946 } 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5947 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5948 if (port_table_entry->sas_address == port_entry->sas_address) { 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5949 if (matched_code == 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5950 MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5951 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5952 if (matched_code == MATCHED_WITH_ADDR_AND_SUBPHYMASK) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5953 continue; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5954 matched_code = MATCHED_WITH_ADDR; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5955 matched_port = port_table_entry; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5956 lcount++; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5957 } 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5958 } 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5959 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5960 *matched_port_entry = matched_port; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5961 if (matched_code == MATCHED_WITH_ADDR) 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5962 *count = lcount; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5963 return matched_code; 2756bd46f6fdde Sreekanth Reddy 2020-10-09 5964 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org