diff --git a/drivers/gpu/drm/nouveau/nouveau_dma.c b/drivers/gpu/drm/nouveau/nouveau_dma.c
index 9d27acda87e24b6c3ad88f9c2ca4a332c4be14a4..eb24e2b05193fd7285407ae1ff05f057a089fc55 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dma.c
@@ -214,7 +214,7 @@ nv50_dma_push_wait(struct nouveau_channel *chan, int count)
 
 		chan->dma.ib_free = get - chan->dma.ib_put;
 		if (chan->dma.ib_free <= 0)
-			chan->dma.ib_free += chan->dma.ib_max + 1;
+			chan->dma.ib_free += chan->dma.ib_max;
 	}
 
 	return 0;