On Tue, Dec 4, 2018 at 11:56 AM Robert Foss <robert.foss@xxxxxxxxxxxxx> wrote:
>
> If dma_fence_wait fails to wait for a supplied in-fence in
> msm_ioctl_gem_submit, make sure we release that in-fence.
>
> Also remove this dma_fence_put() from the 'out' label.
>
> Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxxxxx>
> Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
Fyi, this is queued up in msm-next/fixes
BR,
-R
> ---
> drivers/gpu/drm/msm/msm_gem_submit.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
> index a90aedd6883a..d5e6665a4c8f 100644
> --- a/drivers/gpu/drm/msm/msm_gem_submit.c
> +++ b/drivers/gpu/drm/msm/msm_gem_submit.c
> @@ -411,7 +411,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> struct msm_file_private *ctx = file->driver_priv;
> struct msm_gem_submit *submit;
> struct msm_gpu *gpu = priv->gpu;
> - struct dma_fence *in_fence = NULL;
> struct sync_file *sync_file = NULL;
> struct msm_gpu_submitqueue *queue;
> struct msm_ringbuffer *ring;
> @@ -444,6 +443,8 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> ring = gpu->rb[queue->prio];
>
> if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
> + struct dma_fence *in_fence;
> +
> in_fence = sync_file_get_fence(args->fence_fd);
>
> if (!in_fence)
> @@ -453,11 +454,13 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> * Wait if the fence is from a foreign context, or if the fence
> * array contains any fence from a foreign context.
> */
> - if (!dma_fence_match_context(in_fence, ring->fctx->context)) {
> + ret = 0;
> + if (!dma_fence_match_context(in_fence, ring->fctx->context))
> ret = dma_fence_wait(in_fence, true);
> - if (ret)
> - return ret;
> - }
> +
> + dma_fence_put(in_fence);
> + if (ret)
> + return ret;
> }
>
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> @@ -583,8 +586,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> }
>
> out:
> - if (in_fence)
> - dma_fence_put(in_fence);
> submit_cleanup(submit);
> if (ret)
> msm_gem_submit_free(submit);
> --
> 2.17.1
>
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