tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4b358aabb93a2c654cd1dcab1a25a589f6e2b153 commit: 3f5dff6c18aa0473158686f363184a1bdae0116b [3464/7963] drm/i915/selftest: Better error reporting from hangcheck selftest config: x86_64-randconfig-a011-20210814 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 62df4df41c939205b2dc0a2a3bfb75b8c1ed74fa) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 3f5dff6c18aa0473158686f363184a1bdae0116b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/gt/intel_reset.c:1514: pr_err("[%s] Create context failed: %d!\n", engine->name, err); ^~~ include/linux/printk.h:390:33: note: expanded from macro 'pr_err' printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ drivers/gpu/drm/i915/gt/selftest_hangcheck.c:451:10: note: initialize the variable 'err' to silence this warning int err; ^ = 0 drivers/gpu/drm/i915/gt/selftest_hangcheck.c:566:62: error: variable 'err' is uninitialized when used here [-Werror,-Wuninitialized] pr_err("[%s] Create context failed: %d!\n", engine->name, err); ^~~ include/linux/printk.h:390:33: note: expanded from macro 'pr_err' printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ drivers/gpu/drm/i915/gt/selftest_hangcheck.c:562:10: note: initialize the variable 'err' to silence this warning int err; ^ = 0 2 errors generated. vim +/err +455 drivers/gpu/drm/i915/gt/selftest_hangcheck.c 434 435 static int igt_reset_nop_engine(void *arg) 436 { 437 struct intel_gt *gt = arg; 438 struct i915_gpu_error *global = &gt->i915->gpu_error; 439 struct intel_engine_cs *engine; 440 enum intel_engine_id id; 441 442 /* Check that we can engine-reset during non-user portions */ 443 444 if (!intel_has_reset_engine(gt)) 445 return 0; 446 447 for_each_engine(engine, gt, id) { 448 unsigned int reset_count, reset_engine_count, count; 449 struct intel_context *ce; 450 IGT_TIMEOUT(end_time); 451 int err; 452 453 ce = intel_context_create(engine); 454 if (IS_ERR(ce)) { 456 return PTR_ERR(ce); 457 } 458 459 reset_count = i915_reset_count(global); 460 reset_engine_count = i915_reset_engine_count(global, engine); 461 count = 0; 462 463 st_engine_heartbeat_disable(engine); 464 set_bit(I915_RESET_ENGINE + id, &gt->reset.flags); 465 do { 466 int i; 467 468 if (!wait_for_idle(engine)) { 469 pr_err("%s failed to idle before reset\n", 470 engine->name); 471 err = -EIO; 472 break; 473 } 474 475 for (i = 0; i < 16; i++) { 476 struct i915_request *rq; 477 478 rq = intel_context_create_request(ce); 479 if (IS_ERR(rq)) { 480 struct drm_printer p = 481 drm_info_printer(gt->i915->drm.dev); 482 intel_engine_dump(engine, &p, 483 "%s(%s): failed to submit request\n", 484 __func__, 485 engine->name); 486 487 GEM_TRACE("%s(%s): failed to submit request\n", 488 __func__, 489 engine->name); 490 GEM_TRACE_DUMP(); 491 492 intel_gt_set_wedged(gt); 493 494 err = PTR_ERR(rq); 495 break; 496 } 497 498 i915_request_add(rq); 499 } 500 err = intel_engine_reset(engine, NULL); 501 if (err) { 502 pr_err("intel_engine_reset(%s) failed, err:%d\n", 503 engine->name, err); 504 break; 505 } 506 507 if (i915_reset_count(global) != reset_count) { 508 pr_err("Full GPU reset recorded! (engine reset expected)\n"); 509 err = -EINVAL; 510 break; 511 } 512 513 if (i915_reset_engine_count(global, engine) != 514 reset_engine_count + ++count) { 515 pr_err("%s engine reset not recorded!\n", 516 engine->name); 517 err = -EINVAL; 518 break; 519 } 520 } while (time_before(jiffies, end_time)); 521 clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags); 522 st_engine_heartbeat_enable(engine); 523 524 pr_info("%s(%s): %d resets\n", __func__, engine->name, count); 525 526 intel_context_put(ce); 527 if (igt_flush_test(gt->i915)) 528 err = -EIO; 529 if (err) 530 return err; 531 } 532 533 return 0; 534 } 535 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org