gpu: nvgpu: vgpu: fix regressions causing crashes

Client OS was accessing gpu registers directly, resulting in a crash:

- Use gk20a version of init_gpu_characteristics
- Set cbc_ctrl callback to NULL

Bug 1749990
Bug 1749896

Change-Id: I7e5eea52c5d1d0c2ca7ca5e4d34dc4fc21f4e093
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: http://git-master/r/1120473
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/vgpu.c b/drivers/gpu/nvgpu/vgpu/vgpu.c
index 4750d7ee..ab063c9b 100644
--- a/drivers/gpu/nvgpu/vgpu/vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/vgpu.c
@@ -261,6 +261,7 @@ void vgpu_init_hal_common(struct gk20a *g)
         vgpu_init_mm_ops(gops);
         vgpu_init_debug_ops(gops);
         vgpu_init_fecs_trace_ops(gops);
+        gops->chip_init_gpu_characteristics = gk20a_init_gpu_characteristics;
 }
 
 static int vgpu_init_hal(struct gk20a *g)