drm/exynos: Fix potential NULL pointer dereference

Pointer was being dereferenced after freeing.

Fixes the following error:
drivers/gpu/drm/exynos/exynos_drm_g2d.c:323 g2d_userptr_put_dma_addr() error:
dereferencing freed memory 'g2d_userptr'

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index c1054cb2fe06070923344654b4b2f5500ede8cb8..6ffa0763c0789e2f36cf0cf9076f4583a0ed03f3 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -319,8 +319,8 @@ out:
        g2d_userptr->sgt = NULL;
 
        kfree(g2d_userptr->pages);
-       kfree(g2d_userptr);
        g2d_userptr->pages = NULL;
+       kfree(g2d_userptr);
        g2d_userptr = NULL;
 }