drm/rockchip: gem: add mutex lock for drm mm

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / rockchip / rockchip_drm_drv.c

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 915ca8606ee2d1fe1efebe46093e90f98edf1827..c3969fdc47f2b796b5c290c0e6583c50314f497c 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -754,6 +754,7 @@ static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
        DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
                  start, end);
        drm_mm_init(&private->mm, start, end - start + 1);
+       mutex_init(&private->mm_lock);
 
        return 0;
 }