drm/gma500: Drop dev->struct_mutex from mmap offset function

Simply forgotten about this when I was doing my general cleansing of
simple gem mmap offset functions. There's nothing but core functions
called here, and they all have their own protection already.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1448271183-20523-20-git-send-email-daniel.vetter@ffwll.ch

1 files changed, 3 insertions, 10 deletions

diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index e3bdc8b1c32c..f0357f525f56 100644
--- a/drivers/gpu/drm/gma500/gem.c
+++ b/drivers/gpu/drm/gma500/gem.c
@@ -62,15 +62,10 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev,
         int ret = 0;
         struct drm_gem_object *obj;
 
-        mutex_lock(&dev->struct_mutex);
-
         /* GEM does all our handle to object mapping */
         obj = drm_gem_object_lookup(dev, file, handle);
-        if (obj == NULL) {
-                ret = -ENOENT;
-                goto unlock;
-        }
-        /* What validation is needed here ? */
+        if (obj == NULL)
+                return -ENOENT;
 
         /* Make it mmapable */
         ret = drm_gem_create_mmap_offset(obj);
@@ -78,9 +73,7 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev,
                 goto out;
         *offset = drm_vma_node_offset_addr(&obj->vma_node);
 out:
-        drm_gem_object_unreference(obj);
-unlock:
-        mutex_unlock(&dev->struct_mutex);
+        drm_gem_object_unreference_unlocked(obj);
         return ret;
 }