| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.8 144/177] drm/msm: Disable preemption on all 5xx targets | Date | Tue, 15 Sep 2020 16:13:35 +0200 |
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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 @@ -1510,7 +1510,8 @@ 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);
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