[PATCH] amd/amdkfd: Set correct svm range actual loc after spliting

[Philip Yang]

After range spliting, set new range and old range actual_loc:
new range actual_loc is 0 if new->vram_pages is 0.
old range actual_loc is 0 if old->vram_pages - new->vram_pages == 0.

Signed-off-by: Philip Yang <philip.y...@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index cc24f30f88fb..cb09e1d3a643 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -362,7 +362,6 @@ svm_range *svm_range_new(struct svm_range_list *svms, 
uint64_t start,
        INIT_LIST_HEAD(&prange->child_list);
        atomic_set(&prange->invalid, 0);
        prange->validate_timestamp = 0;
-       prange->vram_pages = 0;
        mutex_init(&prange->migrate_mutex);
        mutex_init(&prange->lock);
 
@@ -980,8 +979,12 @@ svm_range_split_pages(struct svm_range *new, struct 
svm_range *old,
                if (r)
                        return r;
        }
-       if (old->actual_loc)
+       if (old->actual_loc && new->vram_pages) {
                old->vram_pages -= new->vram_pages;
+               new->actual_loc = old->actual_loc;
+               if (!old->vram_pages)
+                       old->actual_loc = 0;
+       }
 
        return 0;
 }
@@ -1058,7 +1061,6 @@ svm_range_split_adjust(struct svm_range *new, struct 
svm_range *old,
        new->flags = old->flags;
        new->preferred_loc = old->preferred_loc;
        new->prefetch_loc = old->prefetch_loc;
-       new->actual_loc = old->actual_loc;
        new->granularity = old->granularity;
        new->mapped_to_gpu = old->mapped_to_gpu;
        bitmap_copy(new->bitmap_access, old->bitmap_access, MAX_GPU_INSTANCE);
-- 
2.35.1