The only task of intel_gt_release_all is to zero gt table. Calling it on error path prevents intel_gt_driver_late_release_all (called from i915_driver_late_release) to cleanup GTs, causing leakage. After i915_driver_late_release GT array is not used anymore so it does not need cleaning at all.
Sample leak report: BUG i915_request (...): Objects remaining in i915_request on __kmem_cache_shutdown() ... Object 0xffff888113420040 @offset=64 Allocated in __i915_request_create+0x75/0x610 [i915] age=18339 cpu=1 pid=1454 kmem_cache_alloc+0x25b/0x270 __i915_request_create+0x75/0x610 [i915] i915_request_create+0x109/0x290 [i915] __engines_record_defaults+0xca/0x440 [i915] intel_gt_init+0x275/0x430 [i915] i915_gem_init+0x135/0x2c0 [i915] i915_driver_probe+0x8d1/0xdc0 [i915] Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8489 Fixes: bec68cc9ea42d8 ("drm/i915: Prepare for multiple GTs") Signed-off-by: Andrzej Hajda <andrzej.ha...@intel.com> --- drivers/gpu/drm/i915/i915_driver.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index 80e85cadb9a262..428ace0bebaac9 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -782,7 +782,7 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent) ret = i915_driver_mmio_probe(i915); if (ret < 0) - goto out_tiles_cleanup; + goto out_runtime_pm_put; ret = i915_driver_hw_probe(i915); if (ret < 0) @@ -842,8 +842,6 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent) i915_ggtt_driver_late_release(i915); out_cleanup_mmio: i915_driver_mmio_release(i915); -out_tiles_cleanup: - intel_gt_release_all(i915); out_runtime_pm_put: enable_rpm_wakeref_asserts(&i915->runtime_pm); i915_driver_late_release(i915); --- base-commit: c6f47b4817ee55a02359c3347a298876cfa93b0e change-id: 20231114-dont_clean_gt_on_error_path-91cd9c3caa0a Best regards, -- Andrzej Hajda <andrzej.ha...@intel.com>
