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drm/amdgpu: refine fault cache updates 

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.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2023-07-26 17:09:40 -04:00
parent 7a41ed8b59
commit 7d3f1d76f3
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -2753,7 +2753,12 @@ 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)) {