Don't update the fault cache if status is 0. In the multiple
fault case, subsequent faults will return a 0 status which is
useless for userspace and replaces the useful fault status, so
only update if status is non-0.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 9294264b15745..39ea2404f38aa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2757,7 +2757,12 @@ void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
xa_lock_irqsave(&adev->vm_manager.pasids, flags);
vm = xa_load(&adev->vm_manager.pasids, pasid);
- if (vm) {
+ /* Don't update the fault cache if status is 0. In the multiple
+ * fault case, subsequent faults will return a 0 status which is
+ * useless for userspace and replaces the useful fault status, so
+ * only update if status is non-0.
+ */
+ if (vm && status) {
vm->fault_info.addr = addr;
vm->fault_info.status = status;
if (AMDGPU_IS_GFXHUB(vmhub)) {
--
2.41.0
