drm/exynos: g2d: fix memory leak to userptr

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=c3bddbda36a74225ad3d04aaa9600a25aff6b98b
Commit:     c3bddbda36a74225ad3d04aaa9600a25aff6b98b
Parent:     27946e97108de281e0e9310965ac9a83a4aaa6fe
Author:     Inki Dae <inki.dae at samsung.com>
AuthorDate: Thu Nov 21 12:09:51 2013 +0900
Committer:  Dave Airlie <airlied at redhat.com>
CommitDate: Thu Nov 21 18:55:08 2013 +1000

    drm/exynos: g2d: fix memory leak to userptr
    
    This patch releases a vma object when cleaning up userptr resources.
    A new vma object was allocated and copied when getting userptr pages
    so the new vma object should be freed properly if the userptr pages
    aren't used anymore.
    
    Signed-off-by: Inki Dae <inki.dae at samsung.com>
    Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
    Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/exynos/exynos_drm_g2d.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index 3271fd4..7bccedc 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -383,6 +383,8 @@ out:
 					g2d_userptr->npages,
 					g2d_userptr->vma);
 
+	exynos_gem_put_vma(g2d_userptr->vma);
+
 	if (!g2d_userptr->out_of_list)
 		list_del_init(&g2d_userptr->list);