[PATCH 06/16] drm/radeon: implement mmap access managament

[David Herrmann]

Correctly allow and revoke buffer access on each open/close via the new
VMA offset manager.

Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: David Herrmann <dh.herrmann at gmail.com>
---
 drivers/gpu/drm/radeon/radeon_gem.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c 
b/drivers/gpu/drm/radeon/radeon_gem.c
index dce99c8..58f5cc5 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -147,12 +147,17 @@ int radeon_gem_object_open(struct drm_gem_object *obj, 
struct drm_file *file_pri
        struct radeon_bo_va *bo_va;
        int r;

+       r = drm_vma_node_allow(&rbo->tbo.vma_node, file_priv->filp);
+       if (r)
+               return r;
+
        if (rdev->family < CHIP_CAYMAN) {
                return 0;
        }

        r = radeon_bo_reserve(rbo, false);
        if (r) {
+               drm_vma_node_revoke(&rbo->tbo.vma_node, file_priv->filp);
                return r;
        }

@@ -177,6 +182,8 @@ void radeon_gem_object_close(struct drm_gem_object *obj,
        struct radeon_bo_va *bo_va;
        int r;

+       drm_vma_node_revoke(&rbo->tbo.vma_node, file_priv->filp);
+
        if (rdev->family < CHIP_CAYMAN) {
                return;
        }
-- 
1.8.3.4