diff mbox series

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

Message ID 20190806150134.104222-4-christian.koenig@amd.com (mailing list archive)
State New, archived
Headers show
Series [1/8] dma-buf: fix busy wait for new shared fences | expand

Commit Message

Christian König Aug. 6, 2019, 3:01 p.m. UTC 
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(-)

Comments

Chris Wilson Aug. 6, 2019, 7:09 p.m. UTC | #1 
Quoting Christian König (2019-08-06 16:01:30)
> Instead of open coding the sequence loop use the new helper.

I've missed something. What reservation_object_fences()?
-Chris
diff mbox series

Patch

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();