diff options
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_gem.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c index abc0684d7e28..bedf53e02e8e 100644 --- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -604,6 +604,13 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data, args->seqno = vc4->emit_seqno; mutex_unlock(&dev->struct_mutex); + + /* To keep any client from getting too far ahead (particularly + * a problem when BO caching is involved), we wait on the + * previous rendering before returning to userspace. + */ + vc4_wait_for_seqno(dev, args->seqno - 1, ~0ull); + return 0; fail: |