drm/nouveau: fix regression on agp boards

Extends the fix in f2f9a2cbaf019481feefe231f996d3602612fa99 to also
workaround permission issues noticed by people using AGP systems.

Cc: stable@vger.kernel.org # 3.16: f2f9a2c: drm/nouveau: fix regression
Cc: stable@vger.kernel.org # 3.16+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c
index 977fb8f15d977bc033f210ef23588e77fa27909c..77c81d6b45ee2ea34add2ffd102815269fb1c916 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_chan.c
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -395,15 +395,20 @@ nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device,
                    struct nouveau_channel **pchan)
 {
        struct nouveau_cli *cli = (void *)nvif_client(&device->base);
+       bool super;
        int ret;
 
+       /* hack until fencenv50 is fixed, and agp access relaxed */
+       super = cli->base.super;
+       cli->base.super = true;
+
        ret = nouveau_channel_ind(drm, device, handle, arg0, pchan);
        if (ret) {
                NV_PRINTK(debug, cli, "ib channel create, %d\n", ret);
                ret = nouveau_channel_dma(drm, device, handle, pchan);
                if (ret) {
                        NV_PRINTK(debug, cli, "dma channel create, %d\n", ret);
-                       return ret;
+                       goto done;
                }
        }
 
@@ -411,8 +416,9 @@ nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device,
        if (ret) {
                NV_PRINTK(error, cli, "channel failed to initialise, %d\n", ret);
                nouveau_channel_del(pchan);
-               return ret;
        }
 
-       return 0;
+done:
+       cli->base.super = super;
+       return ret;
 }