drm/amdgpu: Cache result of last reset at reset domain level.

Will be read by executors of async reset like debugfs.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -5318,6 +5318,8 @@ int amdgpu_device_gpu_recover_imp(struct amdgpu_device *adev,
 
 	if (r)
 		dev_info(adev->dev, "GPU reset end with ret = %d\n", r);
+
+	atomic_set(&adev->reset_domain->reset_res, r);
 	return r;
 }
 
@@ -5332,7 +5334,7 @@ static void amdgpu_device_queue_gpu_recover_work(struct work_struct *work)
 {
 	struct amdgpu_recover_work_struct *recover_work = container_of(work, struct amdgpu_recover_work_struct, base);
 
-	recover_work->ret = amdgpu_device_gpu_recover_imp(recover_work->adev, recover_work->job);
+	amdgpu_device_gpu_recover_imp(recover_work->adev, recover_work->job);
 }
 /*
  * Serialize gpu recover into reset domain single threaded wq
@@ -5349,7 +5351,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
 
 	flush_work(&work.base);
 
-	return work.ret;
+	return atomic_read(&adev->reset_domain->reset_res);
 }
 
 /**

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c

@@ -132,6 +132,7 @@ struct amdgpu_reset_domain *amdgpu_reset_create_reset_domain(enum amdgpu_reset_d
 	}
 
 	atomic_set(&reset_domain->in_gpu_reset, 0);
+	atomic_set(&reset_domain->reset_res, 0);
 	init_rwsem(&reset_domain->sem);
 
 	return reset_domain;

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h

@@ -82,6 +82,7 @@ struct amdgpu_reset_domain {
 	enum amdgpu_reset_domain_type type;
 	struct rw_semaphore sem;
 	atomic_t in_gpu_reset;
+	atomic_t reset_res;
 };