CC: [email protected] BCC: [email protected] CC: [email protected] TO: Wesley Chalmers <[email protected]> CC: Alex Deucher <[email protected]> CC: Jun Lei <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b08968f196d498b19e9d0841d76a03862258f2d8 commit: 9cf9498f668d4c78616ebd2fe2e5f3850b189c5b drm/amd/display: Partition DPCD address space and break up transactions date: 9 months ago :::::: branch date: 5 hours ago :::::: commit date: 9 months ago config: powerpc-randconfig-m031-20220301 (https://download.01.org/0day-ci/archive/20220304/[email protected]/config) compiler: powerpc-linux-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpcd.c:195 core_link_read_dpcd() error: uninitialized symbol 'status'. drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpcd.c:217 core_link_write_dpcd() error: uninitialized symbol 'status'. vim +/status +195 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpcd.c 30adeee52d1ebad Wesley Chalmers 2021-04-01 164 30adeee52d1ebad Wesley Chalmers 2021-04-01 165 enum dc_status core_link_read_dpcd( 30adeee52d1ebad Wesley Chalmers 2021-04-01 166 struct dc_link *link, 30adeee52d1ebad Wesley Chalmers 2021-04-01 167 uint32_t address, 30adeee52d1ebad Wesley Chalmers 2021-04-01 168 uint8_t *data, 30adeee52d1ebad Wesley Chalmers 2021-04-01 169 uint32_t size) 30adeee52d1ebad Wesley Chalmers 2021-04-01 170 { 30adeee52d1ebad Wesley Chalmers 2021-04-01 171 uint32_t extended_address; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 172 uint32_t partitioned_address; 30adeee52d1ebad Wesley Chalmers 2021-04-01 173 uint8_t *extended_data; 30adeee52d1ebad Wesley Chalmers 2021-04-01 174 uint32_t extended_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 175 /* size of the remaining partitioned address space */ 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 176 uint32_t size_left_to_read; 30adeee52d1ebad Wesley Chalmers 2021-04-01 177 enum dc_status status; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 178 /* size of the next partition to be read from */ 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 179 uint32_t partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 180 uint32_t data_index = 0; 30adeee52d1ebad Wesley Chalmers 2021-04-01 181 30adeee52d1ebad Wesley Chalmers 2021-04-01 182 dpcd_extend_address_range(address, data, size, &extended_address, &extended_data, &extended_size); 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 183 partitioned_address = extended_address; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 184 size_left_to_read = extended_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 185 while (size_left_to_read) { 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 186 partition_size = dpcd_get_next_partition_size(partitioned_address, size_left_to_read); 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 187 status = internal_link_read_dpcd(link, partitioned_address, &extended_data[data_index], partition_size); 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 188 if (status != DC_OK) 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 189 break; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 190 partitioned_address += partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 191 data_index += partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 192 size_left_to_read -= partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 193 } 30adeee52d1ebad Wesley Chalmers 2021-04-01 194 dpcd_reduce_address_range(extended_address, extended_data, extended_size, address, data, size); 30adeee52d1ebad Wesley Chalmers 2021-04-01 @195 return status; 30adeee52d1ebad Wesley Chalmers 2021-04-01 196 } 30adeee52d1ebad Wesley Chalmers 2021-04-01 197 30adeee52d1ebad Wesley Chalmers 2021-04-01 198 enum dc_status core_link_write_dpcd( 30adeee52d1ebad Wesley Chalmers 2021-04-01 199 struct dc_link *link, 30adeee52d1ebad Wesley Chalmers 2021-04-01 200 uint32_t address, 30adeee52d1ebad Wesley Chalmers 2021-04-01 201 const uint8_t *data, 30adeee52d1ebad Wesley Chalmers 2021-04-01 202 uint32_t size) 30adeee52d1ebad Wesley Chalmers 2021-04-01 203 { 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 204 uint32_t partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 205 uint32_t data_index = 0; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 206 enum dc_status status; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 207 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 208 while (size) { 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 209 partition_size = dpcd_get_next_partition_size(address, size); 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 210 status = internal_link_write_dpcd(link, address, &data[data_index], partition_size); 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 211 if (status != DC_OK) 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 212 break; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 213 address += partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 214 data_index += partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 215 size -= partition_size; 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 216 } 9cf9498f668d4c7 Wesley Chalmers 2021-04-08 @217 return status; :::::: The code at line 195 was first introduced by commit :::::: 30adeee52d1ebadd8e4e594a54c7cf77250b91db drm/amd/display: Enforce DPCD Address ranges :::::: TO: Wesley Chalmers <[email protected]> :::::: CC: Alex Deucher <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected] _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
