diff --git a/[refs] b/[refs]
index 5bb55c198eaf..74f014640961 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bbb8c3d8820893694a3567716adb3b6f6ba2b7d0
+refs/heads/master: 7978b9cfa59133a34aaad420e447c2a29d5c6152
diff --git a/trunk/drivers/gpu/drm/nouveau/nouveau_irq.c b/trunk/drivers/gpu/drm/nouveau/nouveau_irq.c
index 370c72c968d1..919a619ca7fa 100644
--- a/trunk/drivers/gpu/drm/nouveau/nouveau_irq.c
+++ b/trunk/drivers/gpu/drm/nouveau/nouveau_irq.c
@@ -635,6 +635,7 @@ nv50_pgraph_irq_handler(struct drm_device *dev)
 
 		if ((nv_rd32(dev, 0x400500) & isb) != isb)
 			nv_wr32(dev, 0x400500, nv_rd32(dev, 0x400500) | isb);
+		nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) & ~(1 << 31));
 	}
 
 	nv_wr32(dev, NV03_PMC_INTR_0, NV_PMC_INTR_0_PGRAPH_PENDING);