Am 01.06.21 um 02:06 schrieb Eric Huang:
table_freed will be always true when mapping a memory with size
bigger than 2MB. The problem is page table's entries are always
existed, but existing mapping depends on page talbe's bo, so
using a check of page table's bo existed will resolve the issue.
Signed-off-by: Eric Huang <jinhuieric.huang@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx> for this one.
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 539c117906cc..2c20bba7dc1a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1582,9 +1582,12 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params,
* completely covered by the range and so potentially still in use.
*/
while (cursor.pfn < frag_start) {
- amdgpu_vm_free_pts(adev, params->vm, &cursor);
+ /* Make sure previous mapping is freed */
+ if (cursor.entry->base.bo) {
+ params->table_freed = true;
+ amdgpu_vm_free_pts(adev, params->vm, &cursor);
+ }
amdgpu_vm_pt_next(adev, &cursor);
- params->table_freed = true;
}
} else if (frag >= shift) {
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