etnaviv: fix submit error path

If the gpu submit fails, bail out to avoid accessing a potentially
unititalized fence.

CC: stable@vger.kernel.org #4.12+
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 6463fc2c736fd4db5881a259b21848328b7f6cea..b95362186f9c8bc927b48fe6b10f9b1d71470a92 100644 (file)
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -445,8 +445,10 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
        cmdbuf->user_size = ALIGN(args->stream_size, 8);
 
        ret = etnaviv_gpu_submit(gpu, submit, cmdbuf);
-       if (ret == 0)
-               cmdbuf = NULL;
+       if (ret)
+               goto out;
+
+       cmdbuf = NULL;
 
        if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
                /*