linux-kernel - [PATCH v1] drm/msm: Move fence put to where failure occurs

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Message-Id: <20181101161228.19432-1-robert.foss@collabora.com>
Date:   Thu,  1 Nov 2018 17:12:28 +0100
From:   Robert Foss <robert.foss@...labora.com>
To:     robdclark@...il.com, airlied@...ux.ie,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Chris Wilson <chris@...is-wilson.co.uk>
Cc:     Robert Foss <robert.foss@...labora.com>
Subject: [PATCH v1] drm/msm: Move fence put to where failure occurs

If dma_fence_wait fails to wait for a supplied in-fence in
msm_ioctl_gem_submit, make sure we release that in-fence.

Also remove this dma_fence_put() from the 'out' label.

Signed-off-by: Robert Foss <robert.foss@...labora.com>
---
 drivers/gpu/drm/msm/msm_gem_submit.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index a90aedd6883a..3e7704af5b24 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -411,7 +411,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	struct msm_file_private *ctx = file->driver_priv;
 	struct msm_gem_submit *submit;
 	struct msm_gpu *gpu = priv->gpu;
-	struct dma_fence *in_fence = NULL;
 	struct sync_file *sync_file = NULL;
 	struct msm_gpu_submitqueue *queue;
 	struct msm_ringbuffer *ring;
@@ -444,7 +443,8 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	ring = gpu->rb[queue->prio];
 
 	if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
-		in_fence = sync_file_get_fence(args->fence_fd);
+		struct dma_fence *in_fence = sync_file_get_fence(
+			args->fence_fd);
 
 		if (!in_fence)
 			return -EINVAL;
@@ -455,8 +455,10 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 		 */
 		if (!dma_fence_match_context(in_fence, ring->fctx->context)) {
 			ret = dma_fence_wait(in_fence, true);
-			if (ret)
+			if (ret) {
+				dma_fence_put(in_fence);
 				return ret;
+			}
 		}
 	}
 
@@ -583,8 +585,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	}
 
 out:
-	if (in_fence)
-		dma_fence_put(in_fence);
 	submit_cleanup(submit);
 	if (ret)
 		msm_gem_submit_free(submit);
-- 
2.17.1