drm/amdgpu: check flush fence context instead of same ring v2
Otherwise we can run into the following situation:
1. Process A grabs ID 1 for ring 0.
2. Process B grabs ID 1 for ring 0.
3. Process A grabs ID 1 for ring 1.
4. Process A tries to reuse ID1 for ring 0 but things he doesn't need to flush.
v2: check the context of the flush fence instead of messing with the owner field.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 2f8496d..a041168 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -195,6 +195,7 @@
struct amdgpu_job *job)
{
struct amdgpu_device *adev = ring->adev;
+ uint64_t fence_context = adev->fence_context + ring->idx;
struct fence *updates = sync->last_vm_update;
struct amdgpu_vm_id *id, *idle;
struct fence **fences;
@@ -254,7 +255,6 @@
i = ring->idx;
do {
struct fence *flushed;
- bool same_ring = ring->idx == i;
id = vm->ids[i++];
if (i == AMDGPU_MAX_RINGS)
@@ -272,8 +272,11 @@
if (job->vm_pd_addr != id->pd_gpu_addr)
continue;
- if (!same_ring &&
- (!id->last_flush || !fence_is_signaled(id->last_flush)))
+ if (!id->last_flush)
+ continue;
+
+ if (id->last_flush->context != fence_context &&
+ !fence_is_signaled(id->last_flush))
continue;
flushed = id->flushed_updates;