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Wysocki" Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: drivers/acpi/x86/s2idle.c:395:13: sparse: sparse: restricted suspend_state_t degrades to integer Message-ID: <202204221808.8QMBRC91-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d569e86915b7f2f9795588591c8d5ea0b66481cb commit: fef98671194be005853cbbf51b164a3927589b64 ACPI: PM: s2idle: Move x86-specific code to the x86 directory date: 1 year, 4 months ago config: x86_64-randconfig-s022 (https://download.01.org/0day-ci/archive/20220422/202204221808.8QMBRC91-lkp@intel.com/config) compiler: gcc-11 (Debian 11.2.0-20) 11.2.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fef98671194be005853cbbf51b164a3927589b64 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fef98671194be005853cbbf51b164a3927589b64 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ drivers/ kernel// net/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> drivers/acpi/x86/s2idle.c:395:13: sparse: sparse: restricted suspend_state_t degrades to integer drivers/acpi/x86/s2idle.c:395:33: sparse: sparse: restricted suspend_state_t degrades to integer vim +395 drivers/acpi/x86/s2idle.c 348 349 static int lps0_device_attach(struct acpi_device *adev, 350 const struct acpi_device_id *not_used) 351 { 352 union acpi_object *out_obj; 353 354 if (lps0_device_handle) 355 return 0; 356 357 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) 358 return 0; 359 360 if (acpi_s2idle_vendor_amd()) { 361 guid_parse(ACPI_LPS0_DSM_UUID_AMD, &lps0_dsm_guid); 362 out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 0, 0, NULL); 363 rev_id = 0; 364 } else { 365 guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); 366 out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); 367 rev_id = 1; 368 } 369 370 /* Check if the _DSM is present and as expected. */ 371 if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) { 372 acpi_handle_debug(adev->handle, 373 "_DSM function 0 evaluation failed\n"); 374 return 0; 375 } 376 377 lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer; 378 379 ACPI_FREE(out_obj); 380 381 acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", 382 lps0_dsm_func_mask); 383 384 lps0_device_handle = adev->handle; 385 386 if (acpi_s2idle_vendor_amd()) 387 lpi_device_get_constraints_amd(); 388 else 389 lpi_device_get_constraints(); 390 391 /* 392 * Use suspend-to-idle by default if the default suspend mode was not 393 * set from the command line. 394 */ > 395 if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3) 396 mem_sleep_current = PM_SUSPEND_TO_IDLE; 397 398 /* 399 * Some LPS0 systems, like ASUS Zenbook UX430UNR/i7-8550U, require the 400 * EC GPE to be enabled while suspended for certain wakeup devices to 401 * work, so mark it as wakeup-capable. 402 */ 403 acpi_ec_mark_gpe_for_wake(); 404 405 return 0; 406 } 407 -- 0-DAY CI Kernel Test Service https://01.org/lkp