drm/nouveau: have nv_mask return original register value

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index b1be617..c684686 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -1255,12 +1255,11 @@ static inline void nv_wr32(struct drm_device *dev, unsigned reg, u32 val)
        iowrite32_native(val, dev_priv->mmio + reg);
 }
 
-static inline void nv_mask(struct drm_device *dev, u32 reg, u32 mask, u32 val)
+static inline u32 nv_mask(struct drm_device *dev, u32 reg, u32 mask, u32 val)
 {
        u32 tmp = nv_rd32(dev, reg);
-       tmp &= ~mask;
-       tmp |= val;
-       nv_wr32(dev, reg, tmp);
+       nv_wr32(dev, reg, (tmp & ~mask) | val);
+       return tmp;
 }
 
 static inline u8 nv_rd08(struct drm_device *dev, unsigned reg)