drm/vmwgfx: Make sure to unpin old and pin new framebuffer.

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
index a348fec..e1b3cf5 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
@@ -150,6 +150,15 @@ static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
        struct vmw_legacy_display_unit *entry;
        struct list_head *at;
 
+       BUG_ON(!ld->num_active && ld->fb);
+       if (vfb != ld->fb) {
+               if (ld->fb && ld->fb->unpin)
+                       ld->fb->unpin(ld->fb);
+               if (vfb->pin)
+                       vfb->pin(vfb);
+               ld->fb = vfb;
+       }
+
        if (!list_empty(&ldu->active))
                return 0;
 
@@ -162,12 +171,8 @@ static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
        }
 
        list_add(&ldu->active, at);
-       if (ld->num_active++ == 0) {
-               BUG_ON(ld->fb);
-               if (vfb->pin)
-                       vfb->pin(vfb);
-               ld->fb = vfb;
-       }
+
+       ld->num_active++;
 
        return 0;
 }