[PATCH v5 02/20] drm/msm: Fix drm/sched point of no return rules

[Daniel Vetter]

Originally drm_sched_job_init was the point of no return, after which
drivers must submit a job. I've split that up, which allows us to fix
this issue pretty easily.

Only thing we have to take care of is to not skip to error paths after
that. Other drivers do this the same for out-fence and similar things.

Fixes: 1d8a5ca436ee ("drm/msm: Conversion to drm scheduler")
Cc: Rob Clark <robdclark at chromium.org>
Cc: Rob Clark <robdclark at gmail.com>
Cc: Sean Paul <sean at poorly.run>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: "Christian König" <christian.koenig at amd.com>
Cc: linux-arm-msm at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: freedreno at lists.freedesktop.org
Cc: linux-media at vger.kernel.org
Cc: linaro-mm-sig at lists.linaro.org
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/msm/msm_gem_submit.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 6d6c44f0e1f3..d0ed4ddc509e 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -52,9 +52,6 @@ static struct msm_gem_submit *submit_create(struct drm_device *dev,
 		return ERR_PTR(ret);
 	}
 
-	/* FIXME: this is way too early */
-	drm_sched_job_arm(&job->base);
-
 	xa_init_flags(&submit->deps, XA_FLAGS_ALLOC);
 
 	kref_init(&submit->ref);
@@ -883,6 +880,9 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 
 	submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
 
+	/* point of no return, we _have_ to submit no matter what */
+	drm_sched_job_arm(&submit->base);
+
 	/*
 	 * Allocate an id which can be used by WAIT_FENCE ioctl to map back
 	 * to the underlying fence.
@@ -892,17 +892,16 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	if (submit->fence_id < 0) {
 		ret = submit->fence_id = 0;
 		submit->fence_id = 0;
-		goto out;
 	}
 
-	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
+	if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 		struct sync_file *sync_file = sync_file_create(submit->user_fence);
 		if (!sync_file) {
 			ret = -ENOMEM;
-			goto out;
+		} else {
+			fd_install(out_fence_fd, sync_file->file);
+			args->fence_fd = out_fence_fd;
 		}
-		fd_install(out_fence_fd, sync_file->file);
-		args->fence_fd = out_fence_fd;
 	}
 
 	submit_attach_object_fences(submit);
-- 
2.32.0