Quoting Robert Foss (2018-11-01 16:12:28)
> 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>
> ---
> drivers/gpu/drm/msm/msm_gem_submit.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
> index a90aedd6883a..3e7704af5b24 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;
> @@ -444,7 +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) {
> - in_fence = sync_file_get_fence(args->fence_fd);
> + struct dma_fence *in_fence = sync_file_get_fence(
> + args->fence_fd);
>
> if (!in_fence)
> return -EINVAL;
> @@ -455,8 +455,10 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> */
> if (!dma_fence_match_context(in_fence, ring->fctx->context)) {
> ret = dma_fence_wait(in_fence, true);
> - if (ret)
> + if (ret) {
> + dma_fence_put(in_fence);
> return ret;
> + }
> }
Careful, we need to keep the put for the normal path. Maybe,
if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
struct dma_fence *in_fence;
in_fence = sync_file_get_fence(args->fence_fd); // keep line breaks natural
if (!in_fence)
return -EINVAL;
ret = 0;
if (!dma_fence_match_match_context(in_fence, ring->fctx->context)
ret = dma_fence_wait(in_fence, true);
dma_fence_put(in_fence);
if (ret)
return ret;
}
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