[PATCH 1/4] drm/msm: Take lru lock once per job_run

[Rob Clark]

From: Rob Clark <robdcl...@chromium.org>

Rather than acquiring it and dropping it for each individual obj.

Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
 drivers/gpu/drm/msm/msm_gem.c        | 3 ---
 drivers/gpu/drm/msm/msm_ringbuffer.c | 5 +++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 20cfd86d2b32..6d1dbffc3905 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -509,14 +509,11 @@ void msm_gem_unpin_locked(struct drm_gem_object *obj)
  */
 void msm_gem_unpin_active(struct drm_gem_object *obj)
 {
-       struct msm_drm_private *priv = obj->dev->dev_private;
        struct msm_gem_object *msm_obj = to_msm_bo(obj);
 
-       mutex_lock(&priv->lru.lock);
        msm_obj->pin_count--;
        GEM_WARN_ON(msm_obj->pin_count < 0);
        update_lru_active(obj);
-       mutex_unlock(&priv->lru.lock);
 }
 
 struct msm_gem_vma *msm_gem_get_vma_locked(struct drm_gem_object *obj,
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c 
b/drivers/gpu/drm/msm/msm_ringbuffer.c
index b60199184409..8b8353dcde9f 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.c
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
@@ -16,10 +16,13 @@ static struct dma_fence *msm_job_run(struct drm_sched_job 
*job)
        struct msm_gem_submit *submit = to_msm_submit(job);
        struct msm_fence_context *fctx = submit->ring->fctx;
        struct msm_gpu *gpu = submit->gpu;
+       struct msm_drm_private *priv = gpu->dev->dev_private;
        int i;
 
        msm_fence_init(submit->hw_fence, fctx);
 
+       mutex_lock(&priv->lru.lock);
+
        for (i = 0; i < submit->nr_bos; i++) {
                struct drm_gem_object *obj = &submit->bos[i].obj->base;
 
@@ -28,6 +31,8 @@ static struct dma_fence *msm_job_run(struct drm_sched_job 
*job)
                submit->bos[i].flags &= ~(BO_VMA_PINNED | BO_OBJ_PINNED);
        }
 
+       mutex_unlock(&priv->lru.lock);
+
        /* TODO move submit path over to using a per-ring lock.. */
        mutex_lock(&gpu->lock);
 
-- 
2.41.0