drm/amdkfd: Add sync after creating vram bo

There will be data corruption on vram allocated by svm
if the initialization is not complete and application is
writting on the memory. Adding sync to wait for the
initialization completion is to resolve this issue.

Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 814f99888ab10b276d135319125891db0f2721f8..b94d2c1422ad824d42af5d7bffa760cc9ca453fa 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -570,6 +570,15 @@ svm_range_vram_node_new(struct amdgpu_device *adev, struct svm_range *prange,
                goto reserve_bo_failed;
        }
 
+       if (clear) {
+               r = amdgpu_bo_sync_wait(bo, AMDGPU_FENCE_OWNER_KFD, false);
+               if (r) {
+                       pr_debug("failed %d to sync bo\n", r);
+                       amdgpu_bo_unreserve(bo);
+                       goto reserve_bo_failed;
+               }
+       }
+
        r = dma_resv_reserve_fences(bo->tbo.base.resv, 1);
        if (r) {
                pr_debug("failed %d to reserve bo\n", r);