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 8bd6fa6..6873b14 100644 (file)
--- 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;
 }