drm/armada: use unlocked gem unreferencing

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index cebcab560626..7ea35bee7cd5 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -972,7 +972,7 @@ static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
         struct armada_private *priv = crtc->dev->dev_private;
 
         if (dcrtc->cursor_obj)
-                drm_gem_object_unreference(&dcrtc->cursor_obj->obj);
+                drm_gem_object_unreference_unlocked(&dcrtc->cursor_obj->obj);
 
         priv->dcrtc[dcrtc->num] = NULL;
         drm_crtc_cleanup(&dcrtc->crtc);
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index 60a688ef81c7..aaf88641bfc5 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -352,13 +352,13 @@ int armada_gem_mmap_ioctl(struct drm_device *dev, void *data,
                 return -ENOENT;
 
         if (!dobj->obj.filp) {
-                drm_gem_object_unreference(&dobj->obj);
+                drm_gem_object_unreference_unlocked(&dobj->obj);
                 return -EINVAL;
         }
 
         addr = vm_mmap(dobj->obj.filp, 0, args->size, PROT_READ | PROT_WRITE,
                        MAP_SHARED, args->offset);
-        drm_gem_object_unreference(&dobj->obj);
+        drm_gem_object_unreference_unlocked(&dobj->obj);
         if (IS_ERR_VALUE(addr))
                 return addr;