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

diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index e3bdc8b1c32c0786aacea4261351ef9fc5e92ef1..f0357f525f56ef7de27161c3f0393289d589970f 100644 (file)
--- 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;
 }