drm/etnaviv: return GPU fence through the submit structure

The next patch will need the complete dma_fence, instead of just the seqno,
to create the sync_file in etnaviv_ioctl_gem_submit, in case an
out_fence_fd is requested.

The submit needs to hold a reference to the dma_fence, to avoid raceing
with the GPU completing the fence.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
New patch in v3.

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index fb8d5be..1b6f9b8 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -294,6 +294,7 @@ static void submit_cleanup(struct etnaviv_gem_submit *submit)
 	}
 
 	ww_acquire_fini(&submit->ticket);
+	dma_fence_put(submit->fence);
 	kfree(submit);
 }
 
@@ -435,7 +436,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
 	if (ret == 0)
 		cmdbuf = NULL;
 
-	args->fence = submit->fence;
+	args->fence = submit->fence->seqno;
 
 out:
 	submit_unpin_objects(submit);