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drm/amdgpu: unbind in amdgpu_ttm_tt_unpopulate

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Doing this in amdgpu_ttm_backend_destroy() is to late.

It turned out that this is not a good idea at all because it leaves pointers
to freed up system memory pages in the GART tables of the drivers.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210728130552.2074-2-christian.koenig@amd.com
This commit is contained in:
Christian König 2021-07-28 15:05:49 +02:00 • committed by Christian König
parent e54163e918
commit b7e8b086ff
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@ -1066,7 +1066,6 @@ static void amdgpu_ttm_backend_destroy(struct ttm_device *bdev,
{
struct amdgpu_ttm_tt *gtt = (void *)ttm;
amdgpu_ttm_backend_unbind(bdev, ttm);
ttm_tt_destroy_common(bdev, ttm);
if (gtt->usertask)
put_task_struct(gtt->usertask);
@ -1148,6 +1147,8 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
struct amdgpu_ttm_tt *gtt = (void *)ttm;
struct amdgpu_device *adev;
amdgpu_ttm_backend_unbind(bdev, ttm);
if (gtt && gtt->userptr) {
amdgpu_ttm_tt_set_user_pages(ttm, NULL);
kfree(ttm->sg);