[Intel-gfx] [PATCH] drm: Ensure universal_planes is set for atomic

[Daniel Vetter]

Atomic doesn't really work without universal planes anyway. But make
sure that evil userspace doesn't pull the kernel over the table
because we didn't consider a cornercase that just doesn't make sense,
just for safety.

v2: Just force ->universal_planes to the same value to avoid imposing
restrictions on userspace.

Cc: Rob Clark <robdclark at gmail.com>
Reviewed-by: Rob Clark <robdclark at gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/drm_ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 5cb405812245..3785d66721f2 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -355,6 +355,7 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
 		if (req->value > 1)
 			return -EINVAL;
 		file_priv->atomic = req->value;
+		file_priv->universal_planes = req->value;
 		break;
 	default:
 		return -EINVAL;
-- 
2.1.3