drm/msm: fix msm_gem_prime_get_sg_table()

We need to return a new sgt, since the caller takes ownership of it.

Reported-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index dd7a7ab..831461b 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -23,8 +23,12 @@
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
 {
        struct msm_gem_object *msm_obj = to_msm_bo(obj);
-       BUG_ON(!msm_obj->sgt);  /* should have already pinned! */
-       return msm_obj->sgt;
+       int npages = obj->size >> PAGE_SHIFT;
+
+       if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
+               return NULL;
+
+       return drm_prime_pages_to_sg(msm_obj->pages, npages);
 }
 
 void *msm_gem_prime_vmap(struct drm_gem_object *obj)