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drm/msm: Fix wait_fence submitqueue leak

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We weren't dropping the submitqueue reference in all paths.  In
particular, when the fence has already been signalled. Split out
a helper to simplify handling this in the various different return
paths.

Fixes: a61acbbe9c ("drm/msm: Track "seqno" fences by idr")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20211111192457.747899-2-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2021-11-11 11:24:55 -08:00
parent 3466d9e217
commit ea0006d390
1 changed files with 29 additions and 20 deletions
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49
drivers/gpu/drm/msm/msm_drv.c
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@ -967,29 +967,12 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
return ret;
}
static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
struct drm_file *file)
static int wait_fence(struct msm_gpu_submitqueue *queue, uint32_t fence_id,
ktime_t timeout)
{
struct msm_drm_private *priv = dev->dev_private;
struct drm_msm_wait_fence *args = data;
ktime_t timeout = to_ktime(args->timeout);
struct msm_gpu_submitqueue *queue;
struct msm_gpu *gpu = priv->gpu;
struct dma_fence *fence;
int ret;
if (args->pad) {
DRM_ERROR("invalid pad: %08x\n", args->pad);
return -EINVAL;
}
if (!gpu)
return 0;
queue = msm_submitqueue_get(file->driver_priv, args->queueid);
if (!queue)
return -ENOENT;
/*
* Map submitqueue scoped "seqno" (which is actually an idr key)
* back to underlying dma-fence
@ -1001,7 +984,7 @@ static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
ret = mutex_lock_interruptible(&queue->lock);
if (ret)
return ret;
fence = idr_find(&queue->fence_idr, args->fence);
fence = idr_find(&queue->fence_idr, fence_id);
if (fence)
fence = dma_fence_get_rcu(fence);
mutex_unlock(&queue->lock);
@ -1017,6 +1000,32 @@ static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
}
dma_fence_put(fence);
return ret;
}
static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct msm_drm_private *priv = dev->dev_private;
struct drm_msm_wait_fence *args = data;
struct msm_gpu_submitqueue *queue;
int ret;
if (args->pad) {
DRM_ERROR("invalid pad: %08x\n", args->pad);
return -EINVAL;
}
if (!priv->gpu)
return 0;
queue = msm_submitqueue_get(file->driver_priv, args->queueid);
if (!queue)
return -ENOENT;
ret = wait_fence(queue, args->fence, to_ktime(args->timeout));
msm_submitqueue_put(queue);
return ret;