diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c
index 254094ab7fb8f9c4d3dce31f581bbb8f76cbb27e..5da2aa8cc33307702898b4b4a91833c068d41ab9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c
@@ -141,9 +141,8 @@ gk20a_pllg_calc_rate(struct gk20a_clk *clk)
 
 	rate = clk->parent_rate * clk->n;
 	divider = clk->m * pl_to_div[clk->pl];
-	do_div(rate, divider);
 
-	return rate / 2;
+	return rate / divider / 2;
 }
 
 static int