[Intel-gfx] [PATCH 4/4] drm/i915/ttm: ensure we unmap when shrinking

Matthew Auld
2022-01-05T15:00:25Z

Assuming we don't purge the pages, but instead swap them out then we
need to ensure we also unmap the object.

Fixes: 7ae034590cea ("drm/i915/ttm: add tt shmem backend")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index f148e7e48f86..adbbd57bb9bf 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -462,6 +462,8 @@ static int i915_ttm_shrinker_release_pages(struct drm_i915_gem_object *obj,
if (bo->ttm->page_flags & TTM_TT_FLAG_SWAPPED)
return 0;

+ ttm_bo_unmap_virtual(bo);
+
bo->ttm->page_flags |= TTM_TT_FLAG_SWAPPED;
ret = ttm_bo_validate(bo, &place, &ctx);
if (ret) {
--
2.31.1