X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fi915%2Fi915_gem_userptr.c;h=291a9393493dac177d4cd31ad662b354a904a878;hb=85bd5ac371c844f66918dda8c83145a26a55f9f2;hp=6be40f3ba2c79ea08b7b144b6a0de907767ddf93;hpb=d4dc3b24427f91f112b18562dac73f7af60b7a21;p=cascardo%2Flinux.git

diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
index 6be40f3ba2c7..291a9393493d 100644
--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
@@ -758,6 +758,13 @@ i915_gem_userptr_ioctl(struct drm_device *dev, void *data, struct drm_file *file
 	int ret;
 	u32 handle;
 
+	if (!HAS_LLC(dev) && !HAS_SNOOP(dev)) {
+		/* We cannot support coherent userptr objects on hw without
+		 * LLC and broken snooping.
+		 */
+		return -ENODEV;
+	}
+
 	if (args->flags & ~(I915_USERPTR_READ_ONLY |
 			    I915_USERPTR_UNSYNCHRONIZED))
 		return -EINVAL;