From: Jordan Crouse jcrouse@codeaurora.org
commit 7b3f3948c8b7053d771acc9f79810cc410f5e2e0 upstream.
Temporarily disable preemption on a5xx targets pending some improvements to protect the RPTR shadow from being corrupted.
Cc: stable@vger.kernel.org Signed-off-by: Jordan Crouse jcrouse@codeaurora.org Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -1518,7 +1518,8 @@ struct msm_gpu *a5xx_gpu_init(struct drm
check_speed_bin(&pdev->dev);
- ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 4); + /* Restricting nr_rings to 1 to temporarily disable preemption */ + ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1); if (ret) { a5xx_destroy(&(a5xx_gpu->base.base)); return ERR_PTR(ret);