[Intel-gfx] [PATCH] drm/i915: disallow gem ums init ioctl for kms

[Daniel Vetter]

This ioctl used in a kms driver is only useful to create massive
havoc.

v2: Bail out with -ENODEV as suggested by Chris Wilson.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/i915_gem.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 38490cd..cf05e8e 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -141,6 +141,9 @@ i915_gem_init_ioctl(struct drm_device *dev, void *data,
 {
 	struct drm_i915_gem_init *args = data;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -ENODEV;
+
 	if (args->gtt_start >= args->gtt_end ||
 	    (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1))
 		return -EINVAL;
-- 
1.7.7.6