Nouveau - Feb 2015 - [PATCH] gr/gf100: Clear notify interrupt

From: Lauri Peltonen <lpeltonen at nvidia.com>

Notify interrupt is only used for cyclestats. We can just clear it and
avoid an "unknown stat" error that gets printed to dmesg otherwise.

Signed-off-by: Lauri Peltonen <lpeltonen at nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau/nvkm/engine/gr/gf100.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drm/nouveau/nvkm/engine/gr/gf100.c
b/drm/nouveau/nvkm/engine/gr/gf100.c
index 34b6d4baea16..15620c716195 100644
--- a/drm/nouveau/nvkm/engine/gr/gf100.c
+++ b/drm/nouveau/nvkm/engine/gr/gf100.c
@@ -1108,6 +1108,15 @@ gf100_gr_intr(struct nvkm_subdev *subdev)
 	engctx = nvkm_engctx_get(engine, inst);
 	chid   = pfifo->chid(pfifo, engctx);
 
+	if (stat & 0x00000001) {
+		/*
+		 * notifier interrupt, only needed for cyclestats
+		 * can be safely ignored
+		 */
+		nv_wr32(priv, 0x400100, 0x00000001);
+		stat &= ~0x00000001;
+	}
+
 	if (stat & 0x00000010) {
 		handle = nvkm_handle_get_class(engctx, class);
 		if (!handle || nv_call(handle->object, mthd, data)) {
-- 
2.3.0