From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 24 Apr 2012 06:22:52 +0000 (+0200)
Subject: drm/i915: disallow gem ums init ioctl for kms
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7bb6fb8dd958ae773ac205282e3c0b56c22e01ed;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

drm/i915: disallow gem ums init ioctl for kms

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@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index b402d70dc78b..1b808d041949 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -140,6 +140,9 @@ 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;