diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 202c00b17df2..dcae0ec973a9 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2083,7 +2083,7 @@ hsw_compute_linetime_wm(const struct intel_crtc_state *cstate)
 	       PIPE_WM_LINETIME_TIME(linetime);
 }
 
-static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[8])
+static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[])
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);