diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
index c60d1e548800..db5cd65100fe 100644
--- a/drivers/gpu/drm/i915/gvt/mmio.c
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -49,7 +49,7 @@
  * @gpa: guest physical address
  *
  * Returns:
- * Zero on success, negative error code if failed
+ * The MMIO offset of the given GPA
  */
 int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
 {