8:41 p.m.
Hi,
url:
https://github.com/0day-ci/linux/commits/james-liu-hpe-com/ACPI-OSL-Handl...
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-randconfig-m021-20211025 (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>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
smatch warnings:
drivers/acpi/osl.c:467 acpi_os_map_generic_address() error: uninitialized symbol
'addr'.
vim +/addr +467 drivers/acpi/osl.c
6915564dc5a8ab Rafael J. Wysocki 2020-09-11 453 void __iomem
*acpi_os_map_generic_address(struct acpi_generic_address *gas)
29718521237a1b Myron Stowe 2010-10-21 454 {
bc9ffce27962c0 Myron Stowe 2011-11-07 455 u64 addr;
29718521237a1b Myron Stowe 2010-10-21 456
bc9ffce27962c0 Myron Stowe 2011-11-07 457 if (gas->space_id !=
ACPI_ADR_SPACE_SYSTEM_MEMORY)
6915564dc5a8ab Rafael J. Wysocki 2020-09-11 458 return NULL;
f0340367a7885a James Liu 2021-10-22 459 /* Handle a non-register GAS (i.e., a
pointer to a data structure),
f0340367a7885a James Liu 2021-10-22 460 * whose bit width is expected to be 0
according to ACPI spec. 6.4.
f0340367a7885a James Liu 2021-10-22 461 * For example, The RegisterRegion
field in SET_ERROR_TYPE_WITH_ADDRESS
f0340367a7885a James Liu 2021-10-22 462 * points to a data structure whose
format is defined in Table 18.30 in
f0340367a7885a James Liu 2021-10-22 463 * ACPI Spec. 6.4
f0340367a7885a James Liu 2021-10-22 464 */
f0340367a7885a James Liu 2021-10-22 465 if (!gas->bit_width) {
f0340367a7885a James Liu 2021-10-22 466 pr_info("Mapping IOMEM for a
non-register GAS.\n");
f0340367a7885a James Liu 2021-10-22 @467 return acpi_os_map_iomem(addr,
sizeof(unsigned long long));
^
^^^^
Uninitialized.
f0340367a7885a James Liu 2021-10-22 468 }
29718521237a1b Myron Stowe 2010-10-21 469
bc9ffce27962c0 Myron Stowe 2011-11-07 470 /* Handle possible alignment issues */
bc9ffce27962c0 Myron Stowe 2011-11-07 471 memcpy(&addr, &gas->address,
sizeof(addr));
f0340367a7885a James Liu 2021-10-22 472 if (!addr)
6915564dc5a8ab Rafael J. Wysocki 2020-09-11 473 return NULL;
f0340367a7885a James Liu 2021-10-22 474 else
6915564dc5a8ab Rafael J. Wysocki 2020-09-11 475 return acpi_os_map_iomem(addr,
gas->bit_width / 8);
29718521237a1b Myron Stowe 2010-10-21 476 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org