Commit 352c83fb authored by Rob Clark's avatar Rob Clark
Browse files

drm/msm/gpu: make ringbuffer readonly 



The GPU has no business writing into the ringbuffer, let's make it
readonly to the GPU.

Fixes: 7198e6b0 ("drm/msm: add a3xx gpu support")
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Reviewed-by: default avatarJordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent f228af11

drivers/gpu/drm/msm/msm_ringbuffer.c

+2 −1
Original line number Diff line number Diff line
@@ -27,7 +27,8 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, 
	ring->id = id;



	ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,

		MSM_BO_WC, gpu->aspace, &ring->bo, &ring->iova);

		MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->aspace, &ring->bo,

		&ring->iova);



	if (IS_ERR(ring->start)) {

		ret = PTR_ERR(ring->start);