[patch] drm/udl: unlock before returning in udl_gem_mmap()

[Dan Carpenter]

If we hit an error here, then we should unlock and unreference obj
before returning.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 852642d..6de6130 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -210,7 +210,7 @@ int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
 
 	ret = udl_gem_get_pages(gobj, GFP_KERNEL);
 	if (ret)
-		return ret;
+		goto out;
 	if (!gobj->base.map_list.map) {
 		ret = drm_gem_create_mmap_offset(obj);
 		if (ret)