drm/amdgpu/userq: call dma_resv_wait_timeout without test for signalled

In function amdgpu_userq_gem_va_unmap_validate call
dma_resv_wait_timeout directly. Also since we are waiting
forever we should not be having any return value and hence
no handling needed.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: amd-sukhatri

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

@@ -1462,17 +1462,16 @@ int amdgpu_userq_start_sched_for_enforce_isolation(struct amdgpu_device *adev,
 	return ret;
 }
 
-int amdgpu_userq_gem_va_unmap_validate(struct amdgpu_device *adev,
-				       struct amdgpu_bo_va_mapping *mapping,
-				       uint64_t saddr)
+void amdgpu_userq_gem_va_unmap_validate(struct amdgpu_device *adev,
+					struct amdgpu_bo_va_mapping *mapping,
+					uint64_t saddr)
 {
 	u32 ip_mask = amdgpu_userq_get_supported_ip_mask(adev);
 	struct amdgpu_bo_va *bo_va = mapping->bo_va;
 	struct dma_resv *resv = bo_va->base.bo->tbo.base.resv;
-	int ret = 0;
 
 	if (!ip_mask)
-		return 0;
+		return;
 
 	dev_warn_once(adev->dev, "now unmapping a vital queue va:%llx\n", saddr);
 	/**
@@ -1483,14 +1482,8 @@ int amdgpu_userq_gem_va_unmap_validate(struct amdgpu_device *adev,
 	 * unmap is only for one kind of userq VAs, so at this point suppose
 	 * the eviction fence is always unsignaled.
 	 */
-	if (!dma_resv_test_signaled(resv, DMA_RESV_USAGE_BOOKKEEP)) {
-		ret = dma_resv_wait_timeout(resv, DMA_RESV_USAGE_BOOKKEEP, true,
-					    MAX_SCHEDULE_TIMEOUT);
-		if (ret <= 0)
-			return -EBUSY;
-	}
-
-	return 0;
+	dma_resv_wait_timeout(resv, DMA_RESV_USAGE_BOOKKEEP,
+			      false, MAX_SCHEDULE_TIMEOUT);
 }
 
 void amdgpu_userq_pre_reset(struct amdgpu_device *adev)

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

@@ -160,7 +160,7 @@ void amdgpu_userq_start_hang_detect_work(struct amdgpu_usermode_queue *queue);
 int amdgpu_userq_input_va_validate(struct amdgpu_device *adev,
 				   struct amdgpu_usermode_queue *queue,
 				   u64 addr, u64 expected_size);
-int amdgpu_userq_gem_va_unmap_validate(struct amdgpu_device *adev,
-				       struct amdgpu_bo_va_mapping *mapping,
-				       uint64_t saddr);
+void amdgpu_userq_gem_va_unmap_validate(struct amdgpu_device *adev,
+					struct amdgpu_bo_va_mapping *mapping,
+					uint64_t saddr);
 #endif

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

@@ -1978,7 +1978,6 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
 	struct amdgpu_bo_va_mapping *mapping;
 	struct amdgpu_vm *vm = bo_va->base.vm;
 	bool valid = true;
-	int r;
 
 	saddr /= AMDGPU_GPU_PAGE_SIZE;
 
@@ -2003,12 +2002,8 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
 	 * during user requests GEM unmap IOCTL except for forcing the unmap
 	 * from user space.
 	 */
-	if (unlikely(atomic_read(&bo_va->userq_va_mapped) > 0)) {
-		r = amdgpu_userq_gem_va_unmap_validate(adev, mapping, saddr);
-		if (unlikely(r == -EBUSY))
-			dev_warn_once(adev->dev,
-				      "Attempt to unmap an active userq buffer\n");
-	}
+	if (unlikely(atomic_read(&bo_va->userq_va_mapped) > 0))
+		amdgpu_userq_gem_va_unmap_validate(adev, mapping, saddr);
 
 	list_del(&mapping->list);
 	amdgpu_vm_it_remove(mapping, &vm->va);