[PATCH] drm/rockchip: Check iommu itself instead of it's parent for device_is_available

When iommu itself is disabled in dts, we should fallback to non-iommu buffer, check iommu parent is meanless here.

Signed-off-by: Andy Yan andy.yan@rock-chips.com ---

drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index 212bd87c0c4a..0d20c8cc1ffa 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -366,7 +366,7 @@ static int rockchip_drm_platform_of_probe(struct device *dev) }

iommu = of_parse_phandle(port->parent, "iommus", 0); - if (!iommu || !of_device_is_available(iommu->parent)) { + if (!iommu || !of_device_is_available(iommu)) { DRM_DEV_DEBUG(dev, "no iommu attached for %pOF, using non-iommu buffers\n", port->parent);