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drm/msm: Disable preemption on all 5xx targets 

commit 7b3f3948c8 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>
This commit is contained in:
Jordan Crouse 2020-09-03 20:03:12 -06:00 committed by Greg Kroah-Hartman
parent 404ab35baa
commit becb3bbb29
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/msm/adreno/a5xx_gpu.c
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@ -1451,7 +1451,8 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
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);