From: Eric Anholt <eric@anholt.net>
Date: Tue, 16 Apr 2019 22:58:55 +0000 (-0700)
Subject: drm/v3d: Drop reservation of a shared slot in the dma-buf reservations.
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=07fbbd66b9735fe309f3bb4ad6dbfaa767e9222e;p=openwrt%2Fstaging%2Fblogic.git

drm/v3d: Drop reservation of a shared slot in the dma-buf reservations.

We only set the excl (possible-writing) fence pointer and never add a
shared (read-only) fence.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190416225856.20264-5-eric@anholt.net
Acked-by: Rob Clark <robdclark@gmail.com>
---

diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 8bd6fa69f566..6873b14a0d38 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -253,18 +253,6 @@ v3d_lock_bo_reservations(struct drm_gem_object **bos,
 	if (ret)
 		return ret;
 
-	/* Reserve space for our shared (read-only) fence references,
-	 * before we commit the CL to the hardware.
-	 */
-	for (i = 0; i < bo_count; i++) {
-		ret = reservation_object_reserve_shared(bos[i]->resv, 1);
-		if (ret) {
-			drm_gem_unlock_reservations(bos, bo_count,
-						    acquire_ctx);
-			return ret;
-		}
-	}
-
 	return 0;
 }