drm/omap: gem: Replace struct_mutex usage with omap_obj private lock

The DRM device struct_mutex is used to protect against concurrent GEM
object operations that deal with memory allocation and pinning. All
those operations are local to a GEM object and don't need to be
serialized across different GEM objects. Replace the struct_mutex with
a local omap_obj.lock or drop it altogether where not needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_debugfs.c b/drivers/gpu/drm/omapdrm/omap_debugfs.c
index b42e286616b0..95ade441caa8 100644
--- a/drivers/gpu/drm/omapdrm/omap_debugfs.c
+++ b/drivers/gpu/drm/omapdrm/omap_debugfs.c
@@ -30,17 +30,10 @@ static int gem_show(struct seq_file *m, void *arg)
         struct drm_info_node *node = (struct drm_info_node *) m->private;
         struct drm_device *dev = node->minor->dev;
         struct omap_drm_private *priv = dev->dev_private;
-        int ret;
-
-        ret = mutex_lock_interruptible(&dev->struct_mutex);
-        if (ret)
-                return ret;
 
         seq_printf(m, "All Objects:\n");
         omap_gem_describe_objects(&priv->obj_list, m);
 
-        mutex_unlock(&dev->struct_mutex);
-
         return 0;
 }