linux-kernel - [066/200] drm/i915: Reject bind_to_gtt() early if object

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Message-Id: <20100701174251.999488773@clark.site>
Date:	Thu, 01 Jul 2010 10:42:36 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Eric Anholt <eric@...olt.net>
Subject: [066/200] drm/i915: Reject bind_to_gtt() early if object > aperture

2.6.34-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 654fc6073f68efa3b6c466825749e73e7fbb92cd upstream.

If the object is bigger than the entire aperture, reject it early
before evicting everything in a vain attempt to find space.

v2: Use E2BIG as suggested by Owain G. Ainsworth.

Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@...olt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/i915_gem.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2688,6 +2688,14 @@ i915_gem_object_bind_to_gtt(struct drm_g
 		return -EINVAL;
 	}
 
+	/* If the object is bigger than the entire aperture, reject it early
+	 * before evicting everything in a vain attempt to find space.
+	 */
+	if (obj->size > dev->gtt_total) {
+		DRM_ERROR("Attempting to bind an object larger than the aperture\n");
+		return -E2BIG;
+	}
+
  search_free:
 	free_space = drm_mm_search_free(&dev_priv->mm.gtt_space,
 					obj->size, alignment, 0);


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