Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next

- a fix from Eric for synchronization with etnaviv exported dma-bufs
- thermal throttle support for newer GPU cores
- updated module clock gating to work around GPU errata
- a fix to restore userspace buffer cache performance

* 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux:
  drm/etnaviv: restore ETNA_PREP_NOSYNC behaviour
  drm/etnaviv: implement cooling support for new GPU cores
  drm/etnaviv: update MLCG disables with info from newer Vivante driver
  drm/etnaviv: update common.xml.h
  drm/etnaviv: Expose our reservation object when exporting a dmabuf.

1 files changed, 14 insertions, 10 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
index d6fb724fc3cc..9a3bea738330 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -411,16 +411,20 @@ int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
 	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
 	struct drm_device *dev = obj->dev;
 	bool write = !!(op & ETNA_PREP_WRITE);
-	unsigned long remain =
-		op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout);
-	long lret;
-
-	lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
-						   write, true, remain);
-	if (lret < 0)
-		return lret;
-	else if (lret == 0)
-		return remain == 0 ? -EBUSY : -ETIMEDOUT;
+	int ret;
+
+	if (op & ETNA_PREP_NOSYNC) {
+		if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv,
+							  write))
+			return -EBUSY;
+	} else {
+		unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
+
+		ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
+							  write, true, remain);
+		if (ret <= 0)
+			return ret == 0 ? -ETIMEDOUT : ret;
+	}
 
 	if (etnaviv_obj->flags & ETNA_BO_CACHED) {
 		if (!etnaviv_obj->sgt) {