drm/amdgpu: cleanup coding style in amdgpu_vm_flush

Abort early if there is nothing todo and correctly indent the "if"s.
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -597,12 +597,14 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job)
 		id->gws_size != job->gws_size ||
 		id->oa_base != job->oa_base ||
 		id->oa_size != job->oa_size);
+	unsigned patch_offset = 0;
 	int r;
 
-	if (job->vm_needs_flush || gds_switch_needed ||
-		amdgpu_vm_had_gpu_reset(adev, id) ||
-		amdgpu_vm_ring_has_compute_vm_bug(ring)) {
-		unsigned patch_offset = 0;
+	if (!job->vm_needs_flush && !gds_switch_needed &&
+	    !amdgpu_vm_had_gpu_reset(adev, id) &&
+	    !amdgpu_vm_ring_has_compute_vm_bug(ring))
+		return 0;
+
 
 	if (ring->funcs->init_cond_exec)
 		patch_offset = amdgpu_ring_init_cond_exec(ring);
@@ -612,10 +614,11 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job)
 	     amdgpu_vm_ring_has_compute_vm_bug(ring)))
 		amdgpu_ring_emit_pipeline_sync(ring);
 
-		if (ring->funcs->emit_vm_flush && (job->vm_needs_flush ||
-			amdgpu_vm_had_gpu_reset(adev, id))) {
-			struct dma_fence *fence;
+	if (ring->funcs->emit_vm_flush &&
+	    (job->vm_needs_flush || amdgpu_vm_had_gpu_reset(adev, id))) {
+
 		u64 pd_addr = amdgpu_vm_adjust_mc_addr(adev, job->vm_pd_addr);
+		struct dma_fence *fence;
 
 		trace_amdgpu_vm_flush(pd_addr, ring->idx, job->vm_id);
 		amdgpu_ring_emit_vm_flush(ring, job->vm_id, pd_addr);
@@ -637,10 +640,10 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job)
 		id->gws_size = job->gws_size;
 		id->oa_base = job->oa_base;
 		id->oa_size = job->oa_size;
-			amdgpu_ring_emit_gds_switch(ring, job->vm_id,
-							job->gds_base, job->gds_size,
-							job->gws_base, job->gws_size,
-							job->oa_base, job->oa_size);
+		amdgpu_ring_emit_gds_switch(ring, job->vm_id, job->gds_base,
+					    job->gds_size, job->gws_base,
+					    job->gws_size, job->oa_base,
+					    job->oa_size);
 	}
 
 	if (ring->funcs->patch_cond_exec)
@@ -651,7 +654,6 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job)
 		amdgpu_ring_emit_switch_buffer(ring);
 		amdgpu_ring_emit_switch_buffer(ring);
 	}
-	}
 	return 0;
 }