drm/radeon: add radeon_bo_ref function

To be consistent with radeon_bo_unref, needed in the following patch.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 9505766e46dd..480c87d8edc5 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -236,6 +236,15 @@ void radeon_bo_kunmap(struct radeon_bo *bo)
         ttm_bo_kunmap(&bo->kmap);
 }
 
+struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
+{
+        if (bo == NULL)
+                return NULL;
+
+        ttm_bo_reference(&bo->tbo);
+        return bo;
+}
+
 void radeon_bo_unref(struct radeon_bo **bo)
 {
         struct ttm_buffer_object *tbo;
diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h
index 972ec0f2d851..98a47fdf3625 100644
--- a/drivers/gpu/drm/radeon/radeon_object.h
+++ b/drivers/gpu/drm/radeon/radeon_object.h
@@ -129,6 +129,7 @@ extern int radeon_bo_create(struct radeon_device *rdev,
                             struct radeon_bo **bo_ptr);
 extern int radeon_bo_kmap(struct radeon_bo *bo, void **ptr);
 extern void radeon_bo_kunmap(struct radeon_bo *bo);
+extern struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo);
 extern void radeon_bo_unref(struct radeon_bo **bo);
 extern int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr);
 extern int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain,