From: Ben Skeggs <bskeggs@redhat.com>
Date: Thu, 4 Sep 2014 23:01:21 +0000 (+1000)
Subject: drm/nouveau/core: don't leak oclass type bits to user
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2acc868319ed03c0e4b2f747c104d7e2ec0a841f;p=linux-beck.git

drm/nouveau/core: don't leak oclass type bits to user

Fixes not being able to init fence subsystem when multiple boards are
present.

Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/core/core/parent.c b/drivers/gpu/drm/nouveau/core/core/parent.c
index 8701968a9743..30a2911878f8 100644
--- a/drivers/gpu/drm/nouveau/core/core/parent.c
+++ b/drivers/gpu/drm/nouveau/core/core/parent.c
@@ -86,7 +86,7 @@ nouveau_parent_lclass(struct nouveau_object *parent, u32 *lclass, int size)
 	sclass = nv_parent(parent)->sclass;
 	while (sclass) {
 		if (++nr < size)
-			lclass[nr] = sclass->oclass->handle;
+			lclass[nr] = sclass->oclass->handle & 0xffff;
 		sclass = sclass->sclass;
 	}
 
@@ -96,7 +96,7 @@ nouveau_parent_lclass(struct nouveau_object *parent, u32 *lclass, int size)
 		if (engine && (oclass = engine->sclass)) {
 			while (oclass->ofuncs) {
 				if (++nr < size)
-					lclass[nr] = oclass->handle;
+					lclass[nr] = oclass->handle & 0xffff;
 				oclass++;
 			}
 		}