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authorTomasz Rusinowicz <tomasz.rusinowicz@intel.com>2025-10-29 08:14:51 +0100
committerKarol Wachowski <karol.wachowski@linux.intel.com>2025-10-30 08:48:00 +0100
commit00812636df370bedf4e44a0c81b86ea96bca8628 (patch)
tree3e2eef0475daedcf07bebd345f28a0d91662bc50
parent0f5b2982c3915941ab5c6637f01d531091c03ead (diff)
accel/ivpu: Fix race condition when unbinding BOs
Fix 'Memory manager not clean during takedown' warning that occurs when ivpu_gem_bo_free() removes the BO from the BOs list before it gets unmapped. Then file_priv_unbind() triggers a warning in drm_mm_takedown() during context teardown. Protect the unmapping sequence with bo_list_lock to ensure the BO is always fully unmapped when removed from the list. This ensures the BO is either fully unmapped at context teardown time or present on the list and unmapped by file_priv_unbind(). Fixes: 48aea7f2a2ef ("accel/ivpu: Fix locking in ivpu_bo_remove_all_bos_from_context()") Signed-off-by: Tomasz Rusinowicz <tomasz.rusinowicz@intel.com> Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com> Link: https://patch.msgid.link/20251029071451.184243-1-karol.wachowski@linux.intel.com
-rw-r--r--drivers/accel/ivpu/ivpu_gem.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/accel/ivpu/ivpu_gem.c b/drivers/accel/ivpu/ivpu_gem.c
index 2a159535421a..7353cfb73bcb 100644
--- a/drivers/accel/ivpu/ivpu_gem.c
+++ b/drivers/accel/ivpu/ivpu_gem.c
@@ -315,7 +315,6 @@ static void ivpu_gem_bo_free(struct drm_gem_object *obj)
mutex_lock(&vdev->bo_list_lock);
list_del(&bo->bo_list_node);
- mutex_unlock(&vdev->bo_list_lock);
drm_WARN_ON(&vdev->drm, !drm_gem_is_imported(&bo->base.base) &&
!dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ));
@@ -326,6 +325,8 @@ static void ivpu_gem_bo_free(struct drm_gem_object *obj)
ivpu_bo_unbind_locked(bo);
ivpu_bo_unlock(bo);
+ mutex_unlock(&vdev->bo_list_lock);
+
drm_WARN_ON(&vdev->drm, bo->mmu_mapped);
drm_WARN_ON(&vdev->drm, bo->ctx);