gpu: nvgpu: Add return code to fb.tlb_invalidate

  As part of MISRA 17.7 fixes for a different GPU, the tlb_invalidate
  needs to return an error code.

Change-Id: I3b8b9f112708c17457855dd1fb151168791bc6bf
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1810106
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/mm_vgpu.c b/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
index 837508bb..ae35cafc 100644
--- a/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
@@ -250,11 +250,12 @@ void vgpu_mm_l2_flush(struct gk20a *g, bool invalidate)
         vgpu_cache_maint(vgpu_get_handle(g), op);
 }
 
-void vgpu_mm_tlb_invalidate(struct gk20a *g, struct nvgpu_mem *pdb)
+int vgpu_mm_tlb_invalidate(struct gk20a *g, struct nvgpu_mem *pdb)
 {
         nvgpu_log_fn(g, " ");
 
         nvgpu_err(g, "call to RM server not supported");
+        return 0;
 }
 
 void vgpu_mm_mmu_set_debug_mode(struct gk20a *g, bool enable)
diff --git a/drivers/gpu/nvgpu/vgpu/mm_vgpu.h b/drivers/gpu/nvgpu/vgpu/mm_vgpu.h
index 41bae96d..491700fc 100644
--- a/drivers/gpu/nvgpu/vgpu/mm_vgpu.h
+++ b/drivers/gpu/nvgpu/vgpu/mm_vgpu.h
@@ -43,6 +43,6 @@ int vgpu_vm_bind_channel(struct vm_gk20a *vm,
 int vgpu_mm_fb_flush(struct gk20a *g);
 void vgpu_mm_l2_invalidate(struct gk20a *g);
 void vgpu_mm_l2_flush(struct gk20a *g, bool invalidate);
-void vgpu_mm_tlb_invalidate(struct gk20a *g, struct nvgpu_mem *pdb);
+int vgpu_mm_tlb_invalidate(struct gk20a *g, struct nvgpu_mem *pdb);
 void vgpu_mm_mmu_set_debug_mode(struct gk20a *g, bool enable);
 #endif