drm/msm: Ensure mmap offset is initialized

[linux-2.6-microblaze.git] / drivers / gpu / drm / msm / msm_gem_prime.c

diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index 94ab705..dcc8a57 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -11,6 +11,21 @@
 #include "msm_drv.h"
 #include "msm_gem.h"
 
+int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+       int ret;
+
+       /* Ensure the mmap offset is initialized.  We lazily initialize it,
+        * so if it has not been first mmap'd directly as a GEM object, the
+        * mmap offset will not be already initialized.
+        */
+       ret = drm_gem_create_mmap_offset(obj);
+       if (ret)
+               return ret;
+
+       return drm_gem_prime_mmap(obj, vma);
+}
+
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
 {
        struct msm_gem_object *msm_obj = to_msm_bo(obj);