udl: support vmapping imported dma-bufs

This allows udl to get a vmapping of an imported buffer for scanout.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index a029ee39b0c5..ce9a61179925 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -156,8 +156,17 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
         if (!fb->active_16)
                 return 0;
 
-        if (!fb->obj->vmapping)
-                udl_gem_vmap(fb->obj);
+        if (!fb->obj->vmapping) {
+                ret = udl_gem_vmap(fb->obj);
+                if (ret == -ENOMEM) {
+                        DRM_ERROR("failed to vmap fb\n");
+                        return 0;
+                }
+                if (!fb->obj->vmapping) {
+                        DRM_ERROR("failed to vmapping\n");
+                        return 0;
+                }
+        }
 
         start_cycles = get_cycles();