drm/etnaviv: don't put fence in case of submit failure

If we bail out of the submit before actually adding the cmdstream
to the kernel ring there is no valid fence to put. Make sure to skip
the fence_put in that case.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index e1909429837eebc2072d00d9a9f590c6e5f87bd2..de80ee1b71dfa2e8380b6e74b2d8cc6ed4aa6f25 100644 (file)
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -44,6 +44,7 @@ static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
 
                /* initially, until copy_from_user() and bo lookup succeeds: */
                submit->nr_bos = 0;
+               submit->fence = NULL;
 
                ww_acquire_init(&submit->ticket, &reservation_ww_class);
        }
@@ -294,7 +295,8 @@ static void submit_cleanup(struct etnaviv_gem_submit *submit)
        }
 
        ww_acquire_fini(&submit->ticket);
-       dma_fence_put(submit->fence);
+       if (submit->fence)
+               dma_fence_put(submit->fence);
        kfree(submit);
 }