diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c
index d8ca187ae001..25d8e76489e4 100644
--- a/drivers/gpu/drm/i915/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
@@ -131,8 +131,15 @@ err:
 
 static void lpe_audio_platdev_destroy(struct drm_i915_private *dev_priv)
 {
+	/* XXX Note that platform_device_register_full() allocates a dma_mask
+	 * and never frees it. We can't free it here as we cannot guarantee
+	 * this is the last reference (i.e. that the dma_mask will not be
+	 * used after our unregister). So ee choose to leak the sizeof(u64)
+	 * allocation here - it should be fixed in the platform_device rather
+	 * than us fiddle with its internals.
+	 */
+
 	platform_device_unregister(dev_priv->lpe_audio.platdev);
-	kfree(dev_priv->lpe_audio.platdev->dev.dma_mask);
 }
 
 static void lpe_audio_irq_unmask(struct irq_data *d)