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drm/amdgpu: only move pt bos in LRU list on success 

This fixes a race condition in the error case: since the pt bos have not
necessarily been reserved in case of an error, we could move a pt bo that
is currently in the middle of being evicted/moved by another process,
which then resulted in a BUG_ON in ttm_bo_add_to_lru.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicolai Hähnle 2016-01-27 11:04:19 -05:00 committed by Alex Deucher
parent fe6fc1f132
commit 28b8d66e0c
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
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@ -478,9 +478,9 @@ static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, bo
struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
unsigned i;
amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
if (!error) {
amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
/* Sort the buffer list from the smallest to largest buffer,
* which affects the order of buffers in the LRU list.
* This assures that the smallest buffers are added first