On Mon, Nov 29, 2021 at 10:18 AM Rob Clark <robdclark@xxxxxxxxx> wrote:
>
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> Elsewhere we treat zero as "no fence" and __msm_gem_submit_destroy()
> skips removal from fence_idr. We could alternately change this to use
> negative values for "no fence" but I think it is more clear to not allow
> zero as a valid fence_id.
>
probably should have added:
Fixes: a61acbbe9cf8 ("drm/msm: Track "seqno" fences by idr")
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/msm_gem_submit.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
> index 282628d6b72c..6cfa984dee6a 100644
> --- a/drivers/gpu/drm/msm/msm_gem_submit.c
> +++ b/drivers/gpu/drm/msm/msm_gem_submit.c
> @@ -881,7 +881,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> * to the underlying fence.
> */
> submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
> - submit->user_fence, 0, INT_MAX, GFP_KERNEL);
> + submit->user_fence, 1, INT_MAX, GFP_KERNEL);
> if (submit->fence_id < 0) {
> ret = submit->fence_id = 0;
> submit->fence_id = 0;
> --
> 2.33.1
>
