[PATCH 4/8] drm/i915: use new reservation_object_fences helper

From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: intel-gfx@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
	dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk
Subject: [PATCH 4/8] drm/i915: use new reservation_object_fences helper
Date: Tue,  6 Aug 2019 17:01:30 +0200	[thread overview]
Message-ID: <20190806150134.104222-4-christian.koenig@amd.com> (raw)
In-Reply-To: <20190806150134.104222-1-christian.koenig@amd.com>

Instead of open coding the sequence loop use the new helper.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_busy.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_busy.c b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
index 6ad93a09968c..8da0594eda88 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_busy.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
@@ -83,7 +83,7 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
 	struct drm_i915_gem_busy *args = data;
 	struct drm_i915_gem_object *obj;
 	struct reservation_object_list *list;
-	unsigned int seq;
+	struct dma_fence *excl;
 	int err;
 
 	err = -ENOENT;
@@ -109,15 +109,12 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
 	 * to report the overall busyness. This is what the wait-ioctl does.
 	 *
 	 */
-retry:
-	seq = raw_read_seqcount(&obj->base.resv->seq);
+	reservation_object_fences(obj->base.resv, &excl, &list);
 
 	/* Translate the exclusive fence to the READ *and* WRITE engine */
-	args->busy =
-		busy_check_writer(rcu_dereference(obj->base.resv->fence_excl));
+	args->busy = busy_check_writer(excl);
 
 	/* Translate shared fences to READ set of engines */
-	list = rcu_dereference(obj->base.resv->fence);
 	if (list) {
 		unsigned int shared_count = list->shared_count, i;
 
@@ -129,9 +126,6 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
 		}
 	}
 
-	if (args->busy && read_seqcount_retry(&obj->base.resv->seq, seq))
-		goto retry;
-
 	err = 0;
 out:
 	rcu_read_unlock();
-- 
2.17.1

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